Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol.

Easy to use cryptographic framework for data protection: secure messaging with forward secrecy and secure data storage. Has unified APIs across 14 platforms.

An automated, modular cryptanalysis tool; i.e., a Weapon of Math Destruction

A library for doing homomorphic encryption operations on tensors

A library for Partially Homomorphic Encryption in Python

Python tool and library for decrypting and encrypting MS Office files using passwords or other keys

A Python implementation of the Wiener attack on RSA public-key encryption scheme.

PYthon For Homomorphic Encryption Libraries, perform encrypted computations such as sum, mult, scalar product or matrix multiplication in Python, with NumPy compatibility. Uses SEAL/PALISADE as backends, implemented using Cython.

NuCypher fully homomorphic encryption (NuFHE) library implemented in Python

7zip in python3 with ZStandard, PPMd, LZMA2, LZMA1, Delta, BCJ, BZip2, and Deflate compressions, and AES encryption.

A framework for Backdoor development!

Paaster is a secure and user-friendly pastebin application that prioritizes privacy and simplicity. With end-to-end encryption and paste history, Paaster ensures that your pasted code remains confidential and accessible.

NXcrypt - 'python backdoor' framework

Python library for the https://mega.nz/ API.

Ransom0 is a open source ransomware made with Python, designed to find and encrypt user data.

Crypter in Python 3 with advanced functionality, Bypass VM, Encrypt Source with AES & Base64 Encoding | Evil Code is executed by bruteforcing the decryption key, and then executing the decrypted evil code

Microsoft SEAL 4.X For Python

Python Webpush Data encryption library

A performant NumPy extension for Galois fields and their applications

Simple, secure encryption and decryption for Python 2.7 and 3