MD5的全称是message-digest algorithm 5（信息-摘要算法），在90年代初由mit laboratory for computer science和rsa data security inc的ronald l. rivest开发出来，经md2、md3和md4发展而来。-The full name is the MD5 message-digest algorithm 5 (Information- digest algorithm), in the early 90s by the mit laboratory for computer science and the rsa data security inc the ronald l. rivest developed by md2, md3 and md4 evolved.