Authenticator code generator
AssigneeBurroughs Corporation
InventorCarl M. Campbell, Jr.
Life of this patent
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Abstract
A device for generating an authenticator code by encrypting the contents of a plain text message in accordance with a unique user supplied authenticator key variable. The device operates in two phases, the first of which processes every character in the plain text message and produces a first sequence of 16 check bits. The second phase processes this first 16 check bit sequence and transforms it into a second sequence of 16 check bits which may be utilized as an authenticator code.
Claims15
A system for generating an authenticator code for a message comprised of n plain text characters under control of an authenticator key, said authenticator code key variable comprised of a sequence of k digits, selected ones of said k digits for controlling various operations within said system, each of said n plain text characters having p digits, each of said k digits composed of q binary digits, said system comprising:
- first stage processing means, sequentially responsive to each of said n plain text characters, said first stage processing means for carrying out a plurality of linear and non-linear transformations on each of said n plain text characters, whereby the combined transformation executed on cond stage processing means for encrypting said first residue as a function of said authenticator key, whereby the encryption process performed on said first residue develops said authenticator code, said authenticator code including a second sequence of check digits generated as a result of the encryption process performed on said first residue.
Dependencies are inferred from the claim text.