The American Data Encryption Standard DES was proposed in 1976 and used thru the end of the 20th century. During this time, the DES algorithm and its transmutations dominated the research and development of the block cipher algorithm.

• 从1976年美国数据加密标准算法DES公布以来，到20世纪末，DES算法或其某种变形基本主宰了对称算法的研究和发展。