Efficient packet encryption method

Details Efficient packet encryption method Efficient packet encryption method

2006-02-28

2006-02-28

Smithers, Matthew (Department: 2137)

Cryptography

Communication system using cryptography

Data stream/substitution enciphering

C380S037000

Reexamination Certificate

active

07006628

ABSTRACT:
The present efficient packet encryption method decreases the computation time to encrypt and decrypt successive packets of plaintext data. An S-vector is generated and the S-vector is used to encrypt successive packets of plaintext, thus reducing the per packet encryption/decryption time. The formula for encrypting successive packets includes use of the packet sequence number with a third variable injected to eliminate the predictability of the variables, thus making the present efficient packet encryption method more secure. A fourth variable is injected into the calculations to generate an encryption stream that does not repeat as frequently to provide additional security from hackers. For encrypting a packet having a long payload of plaintext, a packet byte sequence number is used to generate an encryption stream that is less likely to repeat within a particular packet.

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