Blosc is a high performance compressor optimized for binary data. It has been designed to transmit data to the processor cache faster than the traditional, non-compressed, direct memory fetch approach via a memcpy() system call.

Blosc works well for compressing numerical arrays that contains data with relatively low entropy, like sparse data, time series, grids with regular-spaced values, etc.

This Python package wraps the Blosc library.

In data compression, BCJ, short for Branch-Call-Jump, refers to a technique that improves the compression of machine code of executable binaries by replacing relative branch addresses with absolute ones. This allows a LZMA compressor to identify duplicate targets and archive higher compression rate. BCJ is used in the 7-zip compression utility as the default filter for executable binaries.

pybcj provides Python bindings to a BCJ implementation in C.

Bitshuffle is an algorithm that rearranges typed, binary data for improving compression, as well as a python/C package that implements this algorithm within the Numpy framework.

pyzopfli is a straight forward wrapper around the ZlibCompress method of the the zopfli library.

PPMd is a compression algorithm library using the Prediction by Partial Matching statistical technique. It is used in RAR and 7-Zip as one of several possible methods.

This package provides python bindings for the lz4 compression library by Yann Collet. The project contains bindings for the LZ4 block format and the LZ4 frame format.

python-python-snappy provides bindings to the Snappy library and can be used to compress and decompress files and streams. It can also be used directly from the command line.

This package aims to provide faster zlib and gzip compatible compression and decompression by implementing Python bindings for the ISA-L library.

This package provides a Python interface to the brotli package, an implementation of the Brotli lossless compression algorithm.

This module provides an xopen function that works like Python's built-in open function, but can also deal with compressed files. Supported compression formats are gzip, bzip2 and, xz, and are automatically recognized by their file extensions. The focus is on being as efficient as possible on all supported Python versions.

Lz-string is a string compressor library for Python.

This package contains a very thin Python wrapper for libdeflate.

Pyppmd provides classes and functions for compressing and decompressing text data, using the Prediction by partial matching (PPM) compression algorithm variation H and I.2. It provides an API similar to Python's zlib/bz2/lzma modules.

This package provides utilities to handle AR files in Python.

This package provides a Python implementation of the JOSE protocol (Javascript Object Signing and Encryption).

Argon2 is a secure password hashing algorithm. It is designed to have both a configurable runtime as well as memory consumption. This means that you can decide how long it takes to hash a password and how much memory is required.

MCUboot is a secure bootloader for 32-bit MCUs. This package provides a tool to securely sign firmware images for booting by MCUboot.

Pyu2f is a Python-based U2F host library. It provides functionality for interacting with a U2F device over USB.

This package is a set of Python bindings for the scrypt key derivation function.

This package contains test vectors for the cryptography package.

This is a low-level, pure Python DBus protocol client. It has an I/O-free core, and integration modules for different event loops.

PyNaCl is a Python binding to libsodium, which is a fork of the Networking and Cryptography library. These libraries have a stated goal of improving usability, security and speed.

This package provides a Python implementation of the HMAC Key Derivation function (HKDF) defined in RFC 5869.

This package provides another Scrypt module for Python.