Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1987-09-10
1990-10-09
Buczinski, Stephen C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 9, 380 24, 380 52, 341 23, 341175, 340543, 340712, 34082531, 34082534, G06F 302
Patent
active
049625306
ABSTRACT:
According to the invention, the keyboard consists of a matrix of keys and variable visible indicia. Each of the variable visible indicia is associated with a key. Upon each keystroke on the keyboard, the system randomly changes the positions of all of the indicia on the matrix. Because the true value of any particular key is independent of the value displayed on the variable visible indicia, a casual observer can not learn the keystrokes being entered into the keyboard. If the code entered at the keyboard matches a stored value, the user is granted access.
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Buczinski Stephen C.
Computer Security Corporation
Gregory Bernarr Earl
LandOfFree
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