数据加密标准：过去与未来

数据加密标准：过去与未来(中文6300字,英文4000字)
数据加密标准（DES）是首个，也是至今为止唯一一个由美国政府批准的公开可用的加密算法标准。这篇文章涉及到了DES的过去与未来，它讨论了在上世纪70年代早期的一些影响了DES加密标准发展的引导力量，关于在70年代中期被提出的标准一些争议，在80年代时的被接受和应用，以及一些可能影响到加密标准的未来的最近的发展。
The Data Encryption Standard: Past and Future
The Data Encryption Standard (DES) is the first, and to the pres-ent date, only, publicly available cryptographic algorithm that has been endorsed by the US.Government. This paper deals with the past and future of the DES. It discusses the forces leading to the development of the standard during the early 1970s, the contro-versy regarding the proposed standard during the mid-I970s, the growing acceptance and use of the standard in the 1980s, and some recent developments that could affect the future of the standard.