A pure-Python implementation of the Data Encryption Standard (DES) block cipher. This repository provides: A DataEncryptionStandard class that can encrypt and decrypt 64‑bit (8‑character) blocks.

An acronym for Data Encryption Standard, DES was developed by IBM. The algorithm expands a single message by up to 8 bytes. DES is a block cipher that encrypts data in blocks of 64 bits by using a ...

The 64-bit A5/1 crypto standard was developed in the late 1980s in preparation for the first GSM digital phones when they appeared in the early 1990s. The good news is that the ageing standard - on ...

The National Institute of Standards and Technology says the advent of massively parallel computing has rendered the Data Encryption Standard inadequate to protect federal government information.

The DES is a symmetric block cipher that operates on 64-bit data blocks using a 56-bit key (plus 8 parity bits). The encryption process follows four main phases ...