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Top 10 Python Libraries for Cybersecurity

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In today’s society, in which technological advances surround us, one of the important priorities is cybersecurity. Cyber threats have been growing quickly, and it has become challenging for cybersecurity experts to keep up with these attacks. Python plays a role here. Python, a high-level programming language, has grown in relevance in the field of cybersecurity. This article will explain what Python is, why it is used in cybersecurity, its benefits, how cybersecurity analysts employ it, and the top ten Python libraries for cybersecurity.

What is Python?

Python is a high-level, interpreted, general-purpose programming language. Because it is meant to be simple to read and write, it is a popular pick for the beginning. Python has a concise and crisp syntax that allows developers to convey concepts in fewer lines of code. Python supports a variety of programming paradigms, including object-oriented, imperative, and functional programming. Its standard library provides modules for numerous internet protocols, including HTTP, SMTP, and FTP, along with various third-party libraries typically used in cybersecurity.

Why is Python used in Cybersecurity?

Python’s prominence in cybersecurity originates from its simplicity, readability, and adaptability. Python is a robust programming language suitable for various purposes ranging from web development to scientific computing. It has a huge and active community that maintains and develops several open-source libraries, frameworks, and tools for cybersecurity. Likewise, Python can be used to swiftly construct prototypes, which makes it an excellent choice for testing security procedures and methods.

Understanding the benefits of Python Programming in Cyber Security

  1. Easy to Learn: Python is one of the easiest programming languages to learn, which is a huge benefit for cybersecurity experts. The syntax is straightforward and accessible, making it simple to develop and comprehend code even for inexperienced programmers.
  2. Large and Active Community: Python has a huge and active developer community that contributes to creating libraries and tools that may be utilized for cybersecurity. This community also offers assistance and tools to help people solve difficulties and develop new skills.
  3. Versatile: Python is a flexible programming language that may be used for various cybersecurity activities, such as penetration testing, malware analysis, and security automation. It may also be used for data analysis, web development, and machine learning, among other things.
  4. Portable: Python code is portable because it can be readily ported from one platform to another. This is crucial in cybersecurity, as code may need to be run on numerous platforms and devices.
  5. Rapid Development: Python’s simplicity of use and extensive library selection make it an attractive language for quick development. This is especially beneficial in cybersecurity, where speedy responses are frequently required.
  6. A large Number of Libraries: Python includes many libraries that may be used for cybersecurity, including Scapy, Requests, BeautifulSoup, and others. These libraries can save time and effort by offering pre-written code for common tasks.
  7. Automation: Python’s simplicity of use and adaptability make it an excellent language for automation. It may be used to automate repetitive operations like vulnerability detection, log file analysis, and firewall configuration.
  8. Open-Source: Python is an open-source language, which implies that anybody may freely use and update it. This has resulted in the creation of a significant number of tools and libraries that are publicly available for use by cybersecurity experts.
  9. Interoperability: Python is readily connected with other languages and technologies, making it a flexible language for cybersecurity. It is compatible with various languages and tools like Bash, PowerShell, and Wireshark.
  10. Cost-effective: Python is a cost-effective language for cybersecurity since it is free and does not require costly license costs. This makes it an appealing option for small organizations and people who cannot afford pricey software solutions.

How do Cybersecurity Analysts use Python?

  1. Penetration Testing: Python is frequently used in penetration testing, which examines a system or network for vulnerabilities. Python enables researchers to create bespoke scripts and tools for identifying and exploiting vulnerabilities.
  2. Malware Analysis: Python may be used to identify and analyze malware. Analysts can create scripts to detect and isolate suspect code and apply machine learning to find trends in massive datasets.
  3. Network Traffic Analysis: Python frequently analyzes network data and identifies unusual behavior. Analysts can create scripts to collect and analyze packets and employ machine learning to detect trends in traffic.
  4. Security Automation: Python may be used to automate common security activities like log analysis, vulnerability detection, and patch administration. Analysts can create scripts that run automatically and send warnings when security incidents occur.
  5. Web Scraping: Python may be used to collect information from websites such as login pages, search forms, and other sensitive data. Analysts may create scripts that automate the scraping process, making enormous volumes of data easier to acquire and evaluate.
  6. Forensic Analysis: Python may be used to analyze security issues and data breaches in forensic analysis. Analysts can create scripts that evaluate logs, system files, and other data sources to determine the cause of an issue.
  7. Password Cracking: Python is useful for password cracking, which is the process of guessing or cracking passwords. Analysts can create bespoke scripts that break passwords and get access to systems using brute force or other approaches.
  8. Data Analysis: Python may be used in cybersecurity for data analysis, such as examining log files, network traffic, and other data sources. Analysts can write scripts to analyze and display data to spot trends and abnormalities.
  9. Threat Intelligence:  Python may be used to acquire and evaluate threat intelligence data, such as information on new vulnerabilities, malware, and attack tactics. Analysts may create scripts automatically acquiring and evaluating this data, delivering real-time alerts on potential hazards.
  10. Reporting and Documentation: Python may be used to generate reports and documentation on security incidents and other occurrences. Analysts may create scripts that generate automated reports, making transmitting critical information easier for management and other stakeholders.

Top 10 Python Libraries for Cybersecurity


Scapy is a capable Python-based network packet production, manipulation, and analysis tool. Scapy may be used to generate customized packets and interact with them in real-time. Scapy is a network analysis, penetration testing, and forensic investigation tool that is widely used in cybersecurity.

Scapy offers a high-level interface for building and transmitting customized network packets. Scapy allows users to generate packets with fine-grained control, setting characteristics such as source and destination addresses, protocol, and payload data. Scapy also has a robust interactive mode for analyzing network data in real-time.

Scapy is used in cybersecurity for a variety of purposes. Scapy may be used to scan a network for open ports or to find susceptible devices, which is a typical use case. Scapy may also be used to construct and deliver customized packets as part of a penetration testing or ethical hacking operation. Scapy may also be used for forensic network traffic analysis, allowing investigators to recreate network conversations and discover criminal activities.

Here’s a sample code that demonstrates the use of Scapy for network packet manipulation in the context of cybersecurity:


from scapy.all import *
# Send a SYN packet to port 80 on a remote host
ip = IP(dst="")
syn = TCP(dport=80, flags="S")
pkt = ip/syn
response = sr1(pkt, timeout=1)
# Print the response
if response:
    print("No response received")

Scapy is used in the above code to send an SYN message to port 80 on a remote computer. This is a standard network reconnaissance technique for identifying open ports on a distant computer. We build the packet with Scapy’s IP and TCP classes, then send it with the sr1 function. The timeout option indicates the amount of time to wait for a response. If we get a response, we use the show method to display the packet in a human-readable format.

Here’s an example output of the code when run:

Begin emission:
.Finished to send 1 packets.
Received 2 packets, got 1 answers, remaining 0 packets
###[ IP ]###
  version   = 4
  ihl       = 5
  tos       = 0x0
  len       = 44
  id        = 0
  flags     = DF
  frag      = 0
  ttl       = 57
  proto     = tcp
  chksum    = 0x7c69
  src       =
  dst       =
  \options   \
###[ TCP ]###
     sport     = http
     dport     = 55642
     seq       = 2557144696
     ack       = 1
     dataofs   = 8
     reserved  = 0
     flags     = SA
     window    = 29200
     chksum    = 0xb4e3
     urgptr    = 0
     options   = [('MSS', 1460), ('SAckOK', b''), ('Timestamp', (13602631, 0)), ('NOP', None), ('WScale', 7)]

We can see in this example that we received a response packet from the remote host. The packet includes a TCP header with the SYN-ACK flags set, indicating that port 80 on the remote host is open. This is important information that might be utilized in a subsequent assault.

2. PyCrypto

PyCrypto is a Python package that implements cryptographic functions such as encryption, decryption, digital signatures, and hash functions. PyCrypto may be used for various cybersecurity applications such as data encryption, secure communication, and safe data storage.

PyCrypto supports a variety of cryptographic methods, including symmetric key encryption techniques such as AES, Blowfish, and DES, as well as asymmetric key encryption algorithms such as RSA. PyCrypto includes hash functions such as SHA-1 and SHA-256 and digital signature algorithms such as DSA and RSA.

PyCrypto is used in cybersecurity to protect data confidentiality and integrity. PyCrypto, for example, may be used to encrypt sensitive data such as passwords or credit card numbers, making it harder for an attacker to access or steal the information. PyCrypto may also be used to sign and validate digital documents, guaranteeing they have not been tampered with and came from a reliable source.


from Crypto.Cipher import AES
# Generate a random encryption key
key = b'SuperSecretKey123'
# Create an AES cipher object
cipher =, AES.MODE_EAX)
# Encrypt some data
data = b'This is some sensitive data'
ciphertext, tag = cipher.encrypt_and_digest(data)
# Decrypt the data
cipher =, AES.MODE_EAX, cipher.nonce)
plaintext = cipher.decrypt_and_verify(ciphertext, tag)
# Print the result

We use PyCrypto in the code above to encrypt sensitive data with AES encryption. Secondly, we produce a random encryption key and use the function to build an AES cipher object. The encrypt and digest method is then used to encrypt the data and produce a tag that will be used to verify the data’s integrity after decryption.

To decode the data, we construct a new cipher object with the same encryption key and nonce (which the cipher object generates automatically) and then use the decrypt and verify method to decrypt the ciphertext to validate the tag. The plaintext data is returned if the tag verification is successful.

Here is an example output of the code when run:

This is some sensitive data

In this case, the plaintext data was successfully encrypted and decoded using PyCrypto’s AES encryption. The result displays the original plaintext data before it was encrypted and decoded. This is a simple example, but PyCrypto may be used to offer powerful encryption and data protection in more complicated systems.


Requests is a well-known Python package for sending HTTP requests and handling the responses. It provides a basic and straightforward interface for sending HTTP requests and may be used in various cybersecurity applications, such as web application testing and vulnerability detection.

Requests support authentication, cookies, and SSL/TLS encryption and may be used to send HTTP and POST requests to web servers. Requests also provide several essential cybersecurity capabilities, such as the ability to route requests through a proxy server and alter the User-Agent header to prevent detection by web application firewalls.

Requests is frequently used in concert with other cybersecurity solutions to automate web application testing and vulnerability detection. A Python script, for example, may utilize Requests to send HTTP queries to a web application and then use a vulnerability testing tool like SQLmap to evaluate the site’s response for SQL injection vulnerabilities.

Here is an example code that demonstrates how to use Requests to send a GET request to a web server and handle the response:


import requests
# Send a GET request to a web server
response = requests.get('')
# Check the response status code
if response.status_code == 200:
    print('Request successful')
    print('Request failed')
# Print the response headers and content
print('Headers:', response.headers)
print('Content:', response.text)

Requests are used in the above code to send a GET request to the Google homepage. We then check the response’s status code to ensure the request succeeded and print the response’s headers and content.

Here is an example output of the code when run:

Request successful
Headers:  {'Date': 'Thu, 17 Feb 2022 20:13:10 GMT', 'Expires': '-1', 'Cache-Control': 'private, max-age=0', 'Content-Type': 'text/html; charset=ISO-8859-1', 'P3P': 'CP="This is not a P3P policy! See for more info."', 'Server': 'gws', 'X-XSS-Protection': '0', 'X-Frame-Options': 'SAMEORIGIN', 'Set-Cookie': '1P_JAR=2022-02-17-20; expires=Sat, 19-Mar-2022 20:13:10 GMT; path=/;; Secure, NID=517=LzFqInlqQbhpbwveW8vnVPrIjvfXOuV7JxWXY8zvYsUr62fNKJcEybPheW8LQOfBch_9ZTcgdnrTSPo6P2QlQjytl1zU6wAcaIH-QvGn1nCmIMeZSxhDf5B5_W5yFNNpR5j1eZZN1nsH12LnZo3NLOjxLgGwxRcXi5wKlk5kYvY; expires=Fri, 19-Aug-2022 20:13:10 GMT; path=/;; HttpOnly'}
Content:  <!doctype html><html itemscope="" itemtype="" lang="en"><head><meta content=

4. BeautifulSoup

BeautifulSoup is a popular Python module for web scraping and HTML and XML document processing. It allows you to explore and retrieve information from HTML and XML files simply and powerfully. It is frequently used in the context of cybersecurity to extract data from websites that include sensitive information, such as login passwords or other forms of data that might be helpful to attackers.

BeautifulSoup’s ability to interpret and browse HTML and XML texts is one of its primary strengths. This is accomplished by constructing a BeautifulSoup object from an HTML or XML file, navigating the page, and extracting the needed information using its different methods. The library includes several methods for searching for and extracting certain tags or components from an HTML or XML file.

BeautifulSoup’s ability to tolerate faulty or badly organized HTML texts is another essential feature. Web scraping can be difficult in many circumstances because the HTML on a website may be poorly structured or include mistakes. BeautifulSoup is intended to handle similar situations and can frequently extract information from such papers when other libraries fail.

Here is an example of how to use BeautifulSoup to extract links from a webpage:


import requests
from bs4 import BeautifulSoup
response = requests.get(url)
soup = BeautifulSoup(response.text, 'html.parser')
for link in soup.find_all('a'):

In this example, we start by making a GET request to the Site we wish to scrape using the requests library. We then build a BeautifulSoup object from the response content and use the find all() function to scan the HTML page for all anchor tags (). Lastly, we use the get() function to obtain the href property value for each anchor tag and report it to the console.

Here is the output for the example code:

This is a simple demonstration of how to use BeautifulSoup, but it highlights the library’s strength and versatility in web scraping and parsing HTML and XML documents. BeautifulSoup may be used to extract sensitive data from websites, search for certain keywords or phrases in web content, and uncover possible vulnerabilities in web applications by evaluating their HTML and XML code in the context of cybersecurity.

5. Paramiko

The Python package Paramiko implements the SSH protocol for secure remote access to servers and other network devices. The library provides a simple API for initiating SSH connections, securely uploading and downloading data, and running remote commands on a remote machine. In the context of cybersecurity, Paramiko is a useful tool for executing several security-related activities, such as remote system management, vulnerability scanning, and automated penetration testing.

One of Paramiko’s key characteristics is its ability to give secure remote access to systems using the SSH protocol. SSH is a popular protocol for secure remote access to servers and other network devices, and it is frequently used in cybersecurity to managing and access systems remotely. SSH protocol implementation in Python, provided by Paramiko, allows users to create secure connections to distant computers using SSH.

Paramiko contains facilities for securely transferring files to and from distant computers, running remote commands on a remote system, and SSH functionality. As a result, it is a flexible solution for a wide range of security-related tasks, including automating penetration testing, executing security audits, and controlling remote access.

Here is an example of how to use Paramiko to establish an SSH connection and execute a remote command:


import paramiko
hostname = ''
username = 'user'
password = 'password'
client = paramiko.SSHClient()
client.connect(hostname, username=username, password=password)
stdin, stdout, stderr = client.exec_command('ls')
for line in stdout:

In this example, we first construct an SSHClient object and configure the host key policy to automatically add new hosts to the known host’s file. The connect() function then creates an SSH connection to the remote machine. After connecting, we use the exec command() function to run the ls command on the remote machine and collect the result. Lastly, we publish the result to the console and disconnect from the network.

This code will provide a list of files and directories in the remote directory where the ls command was run. This explains how to use Paramiko to execute remote commands on a distant machine and obtain the results. This is just a simple example of how Paramiko can be used in the context of cybersecurity, but it demonstrates the power and flexibility of the library when it comes to secure remote access and management of systems.

Here is the output for the example code:


6. Nmap

Nmap is a free and open-source network exploration and security auditing software. Network administrators and security experts widely use it to scan networks, identify hosts and services, and analyze vulnerabilities. Nmap may be used to find network hosts and services, scan ports, and fingerprint network services.

The Nmap Python Library, often called python-nmap, is a Python module that lets you utilize Nmap in your Python programs. It provides a straightforward interface to Nmap and allows you to automate network scanning and enumeration activities. You may use the python-nmap library to conduct host discovery, port scanning, OS and service identification, version detection, and other tasks.

Automating network scanning and security assessment chores is one of the main advantages of utilizing python-nmap. Python-nmap allows you to develop Python programs that run complicated network scans and provide reports on the results. This can save security experts substantial time doing routine network scans and evaluations.

Here is an example code that demonstrates how to use the python-Nmap library to perform a port scan on a host:


import nmap
nm = nmap.PortScanner()
# scan a target host for open ports
nm.scan('localhost', arguments='-p 22,80,443')
# print the state of the ports
for host in nm.all_hosts():
    print('Host : %s (%s)' % (host, nm[host].hostname()))
    print('State : %s' % nm[host].state())
    for proto in nm[host].all_protocols():
        print('Protocol : %s' % proto)
        ports = nm[host][proto].keys()
        for port in ports:
            print('port : %s\tstate : %s' % (port, nm[host][proto][port]['state']))

In this example, we first import the Nmap module and construct a PortScanner object. The scan() function is then used to search the target host localhost for open ports 22, 80, and 443. The arguments parameter indicates the parameters to be supplied to Nmap, which is the list of ports to scan in this case.

Following that, we use a for loop to run over all the hosts provided by the scan and output the status of the ports discovered. We initially print the host and its related hostname (if available), then the host’s condition. We then cycle over all of the identified protocols for the host, printing the status of the ports for each protocol.

The output of this code will be a list of the open ports on the target host, along with their state. Here is an example output:

Host : localhost (localhost)
State : up
Protocol : tcp
port : 22    state : open
port : 80    state : open
port : 443   state : closed

This result indicates that the target host’s ports 22 and 80 are open, while port 443 is closed.

7. Scikit-learn

Scikit-learn is a prominent open-source Python machine-learning package that offers a variety of tools for data analysis, data mining, and machine learning. It is built on NumPy, SciPy, and matplotlib, three of Python’s most popular scientific computing tools. Scikit-learn includes methods for classification, regression, clustering, dimension reduction, and model selection. Preprocessing, feature selection, and cross-validation are also supported.

Scikit-learn is commonly used in cybersecurity applications like malware detection, intrusion detection, and network security. It’s especially useful for evaluating massive network traffic datasets, system logs, and other security-related information. Scikit-learn may be used to create machine learning models that can recognize trends and abnormalities in this data, assisting in detecting and preventing cyber assaults.

Building a malware detection system is one example of how Scikit-learn may be used in cybersecurity. In this case, we would have a dataset of files, some of which are malware and others that are not. We could use Scikit-learn to create a machine learning model that can correctly categorize new files as malware or not based on attributes like file size, entropy, and byte frequency.

Here’s how Scikit-learn may be used to create a rudimentary malware detection system. The Scikit-learn package is used in this code to produce a decision tree classifier, a machine-learning algorithm that creates a tree-like model of decisions and their potential repercussions. We’ll train the classifier on a dataset of binary files, some of which include malware and others that don’t. The objective is to create a model that can identify new files as malware or not, depending on their characteristics.


import numpy as np
from sklearn.tree import DecisionTreeClassifier
# Load the dataset of binary files
X = np.loadtxt('malware_dataset.csv', delimiter=',')
y = np.loadtxt('malware_labels.csv', delimiter=',')
# Split the dataset into training and testing sets
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)
# Train a decision tree classifier on the training data
clf = DecisionTreeClassifier(), y_train)
# Test the classifier on the testing data
y_pred = clf.predict(X_test)
# Print the accuracy of the classifier
print('Accuracy:', clf.score(X_test, y_test))

In this example, we import the dataset of binary files and their labels, which are saved in separate CSV files. We then used the Scikit-train test split learns method to divide the dataset into training and testing sets. We use the DecisionTreeClassifier class to train a decision tree classifier on the training data and then use the prediction method to test the classifier on the testing data. Lastly, we use the score technique to publish the classifier’s accuracy.


Accuracy: 0.95

In this case, the classifier has a 95% accuracy, which means it properly classifies 95% of the files in the testing set as malware or not. A more advanced machine learning model may be utilized with a bigger and more varied dataset to increase the malware detection system’s accuracy in a real-world scenario.

8. TensorFlow

TensorFlow is a Google open-source machine learning framework that is extensively utilized in a broad range of applications, including cybersecurity. It includes a comprehensive range of tools and libraries for developing, training, and deploying machine learning models in production situations.

TensorFlow’s capacity to handle huge and complicated datasets is one of its primary advantages, making it a great tool for cybersecurity applications dealing with massive data volumes. TensorFlow enables developers to create and train models for various use cases, including network intrusion detection, malware categorization, and user behavior analysis.

TensorFlow is frequently used in cybersecurity to construct and train deep learning models, which are especially beneficial for jobs requiring processing and analyzing massive volumes of data. Deep learning models are built on neural networks, consisting of layers of linked nodes that may learn from data like how the human brain functions.

Here is an example of how TensorFlow can be used for malware classification:


import tensorflow as tf
from tensorflow import keras
# Load the dataset of malware samples
data = keras.datasets.mnist
(x_train, y_train), (x_test, y_test) = data.load_data()
# Normalize the pixel values
x_train = x_train / 255.0
x_test = x_test / 255.0
# Define the model architecture
model = keras.Sequential([
    keras.layers.Flatten(input_shape=(28, 28)),
    keras.layers.Dense(128, activation='relu'),
    keras.layers.Dense(10, activation='softmax')
# Compile the model
# Train the model on the training data, y_train, epochs=5)
# Evaluate the model on the testing data
test_loss, test_acc = model.evaluate(x_test, y_test)
# Print the test accuracy
print('Test accuracy:', test_acc)

In this example, we will use the MNIST dataset, which comprises photographs of handwritten digits. Consider each digit a sort of malware, and the model’s purpose is to categorize each digit accurately.

We first load the dataset via TensorFlow’s load data function and then normalize the pixel values to guarantee they are between 0 and 1. The model architecture is then defined using the Sequential class, which allows us to stack many layers of neural networks.

The model’s initial layer is Flatten, which reduces the two-dimensional picture input to a one-dimensional vector. The second layer is a Dense layer with 128 nodes and a relu activation function, a non-linear activation function often employed in deep learning models. The third and final layer is another Dense layer with ten nodes and a softmax activation function that generates a probability distribution across the ten potential classes.

The model is then compiled using the compile method, with the optimizer, loss function, and evaluation metric specified. The Adam optimizer, the sparse categorical cross-entropy loss function, and the accuracy measure are used in this example.

The model is then trained on the training data using the fit technique, with the number of epochs specified. Lastly, we use the evaluate method to assess the model on the testing data and output the test accuracy.


Epoch 1/5
1875/1875 [==============================] - 4s 2ms/step - loss: 0.2614 - accuracy: 0.9244
Epoch 2/5
1875/1875 [==============================] - 4s 2ms/step -

9. PyAutoGUI

PyAutoGUI is a Python module that simulates user interactions with the keyboard and mouse to give a cross-platform method of automating operations. It enables developers to automate operations like clicking buttons, typing text, and moving the mouse pointer that might otherwise be time-consuming or repetitious. PyAutoGUI may be used in cybersecurity for various activities such as penetration testing, vulnerability detection, and password cracking.

One of PyAutoGUI’s important characteristics is its ability to operate with both GUI and command-line applications, as well as web browsers and virtual machines. As a result, it’s a useful tool for various cybersecurity activities, such as automating the exploitation of known vulnerabilities or testing security measures.

Here is an example of how PyAutoGUI can be used to automate a simple login task:


import pyautogui
import time
# Set the position of the username and password fields
username_field = (600, 400)
password_field = (600, 450)
# Set the position of the login button
login_button = (600, 500)
# Enter the username and password
# Click the login button
# Wait for the login to complete

In this example, we are imitating someone signing in to a website or application. Using the screen’s (x, y) coordinates, we first determine the locations of the username and password fields and the login button.

Next, we use PyAutoGUI to utilize the click function to click on the username and password boxes and the typewrite function to input the login and password. Lastly, we click the login button and use the sleep feature to wait for the login to finish.


The code above would not provide visual output, but it would imitate a user checking in to a website or application. In practice, the output would be the successful completion of the login job or any failures that happened throughout the automated process. The output might be improved further by reporting any actions made by the script, such as logging in or encountering issues.

10. Tornado

Tornado is a Python web framework and asynchronous networking toolkit for creating scalable, high-performance online applications. It was created by Facebook and is currently an open-source project. Tornado is built to support hundreds of concurrent connections, making it a popular choice for developing real-time applications like chat services, gaming servers, and analytics systems.

Tornado may be used to create web applications with strong security features in terms of cybersecurity. Tornado, for example, contains built-in support for secure cookies and HTTPS encryption, as well as a configurable user authentication mechanism that can be tailored to match the unique security requirements of an application.

Tornado may also be used to create bespoke network security analysis and testing tools and scripts. For example, Tornado’s async networking features may be leveraged to create efficient port scanners and vulnerability scanners that can rapidly scan huge numbers of hosts and services.

Here’s an example of using Tornado to build a simple web application that performs a network port scan:


import tornado.ioloop
import tornado.web
import socket
class PortScanHandler(tornado.web.RequestHandler):
    def get(self):
        hostname = self.get_argument('hostname')
        start_port = int(self.get_argument('start_port'))
        end_port = int(self.get_argument('end_port'))
        open_ports = []
        for port in range(start_port, end_port+1):
            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            result = sock.connect_ex((hostname, port))
            if result == 0:
        self.write('Open ports: ' + str(open_ports))
def make_app():
    return tornado.web.Application([
        (r"/portscan", PortScanHandler),
if __name__ == "__main__":
    app = make_app()

In this example, we construct a Tornado web application that listens on port 8888 and exposes a /portscan endpoint with three parameters: hostname, start port and end port. When the endpoint is called, the application scans the supplied host and port range for open ports and provides a list of them.

To run this application, you can save the code to a file (e.g., and start the Tornado server by running the following command:


Next, open a web browser and go to http://localhost:8888/portscan? port=1&end port=1000 to execute a port scan for ports 1 to 1000 on The output should be a JSON response with the following open ports:

Open ports: [80, 443]


Python is a sophisticated and adaptable programming language that has grown in popularity in the realm of cybersecurity due to its simplicity of use, wide library support, and flexibility. In this post, we highlighted the advantages of using Python in cybersecurity, such as its ability to automate repetitive processes, manage massive datasets, and connect with other security technologies. We also reviewed some of the most prominent Python libraries used in cybersecurity, including Scapy, PyCrypto, Requests, BeautifulSoup, Paramiko, Nmap, and Scikit-learn, as well as code samples to demonstrate their use.

Beginners who wish to start with Python in cybersecurity should focus on understanding the fundamentals of the language before progressively expanding their knowledge of cybersecurity ideas and technologies. Several online resources, such as classes, tutorials, and books, may assist novices in learning Python and cybersecurity. Beginners can obtain a competitive advantage in the field of cybersecurity by understanding Python and its libraries and contributing to the creation of novel cybersecurity solutions.


Please remember that the above examples are solely for demonstration reasons and should not be used for malevolent purposes. Without authorization, port scanning is unlawful and can result in serious penalties.

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Last Updated : 21 Mar, 2023
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