Cryptographic method and system for double encryption of...

Details Cryptographic method and system for double encryption of... Cryptographic method and system for double encryption of...

2005-06-07

2005-06-07

Barron, Gilberto (Department: 2132)

Cryptography

Particular algorithmic function encoding

C380S030000, C714S752000

Reexamination Certificate

active

06904150

ABSTRACT:
A method and system for encrypting and decrypting a message. A message is created by appending an error detection code to an information block. The binary value of the resulting message is then compared to the sender's encryption modulus. If the binary value of the message is greater than or equal to the sender's encryption modulus, at least one bit of the error detection code is altered to reduce the binary value of the message below the sender's encryption modulus. The potentially modified message is then encrypted once using the sender's private key to generate a once encrypted message referred to herein as the signed message. The signed message is then encrypted using the recipient's public key to produce a doubly encrypted bitstring. The recipient deciphers and decodes the doubly encrypted bitstring. If an decoding failure occurs, the recipient assumes that the error is due to an intentional bit change by the sender and attempts to restore the presumably altered bit or bits to their presumed original value.

REFERENCES:
patent: 5703948 (1997-12-01), Yanovsky
Schneier, B., Applied Cryptography, 1996, John Wiley & Sons, Inc., 2ndEdition, pp. 41-44, 466-74.
Computer Dictionary, 1997, Microsoft Press, 3rdEdition, pp. 122-123.

Affiliated with

Also associated with

Rating

Cryptographic method and system for double encryption of... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cryptographic method and system for double encryption of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cryptographic method and system for double encryption of... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3505694