Multics Security Evaluation: Password and File Encryption Techniques.
Peter J Downey · Defense Technical Information Center (DTIC) · 1977
Passwords are stored in enciphered form in the Multics system. There is no clear text listing of the password file. In 1972, as part of a security analysis of Multics, an ESD team successfuly inverted the enciphering algorithm in use on Multics. This report documents the team's efforts. As a result of the ESD analysis, an improved encryption algorithm is now in use on Multics. (Author)