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.

NuCypher fully homomorphic encryption (NuFHE) library implemented in Python

A framework for Backdoor development!

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.

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

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

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

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

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