Cryptography – Cryptanalysis
Patent
1991-09-09
1993-05-04
Cangialosi, Salvatore
Cryptography
Cryptanalysis
380 46, 380 47, 380 50, H04L 904
Patent
active
052088537
ABSTRACT:
A split key encryption system to crypto-seal a data file comprising a method for unique variable entry (e.g., terminal serial number), random number generation, key storage device, encryption function for combining the unique variable and the random number to generate an encryption variable in an exclusive-OR function using a variable tap linear feedback shift register, and storage function for receiving the encryption variable and the unencrypted data file. A split key decryption system to unseal the crypto-sealed data file comprises a key storage device, terminal, terminal input, and storage function, with decryption again using an exclusive-OR function using a variable tap linear feedback shift register. A comparator allows use of the unencrypted data file only if the decrypted unique variable matches the terminal serial number.
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Armbruster Peter J.
Kennedy Paul R.
Cangialosi Salvatore
Motorola Inc.
Nehr Jeffrey D.
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