GOST (ГОСТ) stands for Gosudarstvennyi Standard, which translates to "Government Standard" in Russian. The GOST block cipher is a symmetric key block cipher that was developed by the Soviet Union and later adopted as a national standard in Russia and other countries of the former Soviet Union.
The GOST block cipher (Magma), defined in the standard GOST 28147-89 (RFC 5830), is a Soviet and Russian government standard symmetric key block cipher with a block size of 64 bits. The original standard, published in 1989, did not give the cipher any name, but the most recent revision of the standard, GOST R 34.12-2015 (RFC 7801, RFC 8891), specifies that it may be referred to as Magma. The GOST hash function is based on this cipher. The new standard also specifies a new 128-bit block cipher called Kuznyechik.
Developed in the 1970s, the standard had been marked 'Top Secret' and then downgraded to 'Secret' in 1990. Shortly after the dissolution of the USSR, it was declassified and it was released to the public in 1994. GOST 28147 was a Soviet alternative to the United States standard algorithm, DES. Thus, the two are very similar in structure.
Encrypt
Decrypt
Sign: Sign a plaintext message using one of the GOST block ciphers.
https://wikipedia.org/wiki/GOST_(block_cipher)