Cryptography – Communication system using cryptography – Symmetric key cryptography
Patent
1997-08-28
2000-04-18
Barron, Jr., Gilberto
Cryptography
Communication system using cryptography
Symmetric key cryptography
380285, 380 44, H04L 922
Patent
active
060524669
ABSTRACT:
A first cipher stream generated from a private key negotiated as a result of a public key exchange is partitioned to form a sequence of secondary keys. The secondary keys are then indexed. In one instance, each plaintext data packet is encrypted with a second cipher streams generated from a different one of the secondary keys. In another instance, a second cipher stream generated from a single secondary key is used to encrypt a plurality of plaintext data packets. A new second cipher stream generated from another one of the secondary keys is then used for encryption following each instance of the loss of a ciphertext data packet. The index is communicated with the ciphertext to identify which secondary key is to be used in generating the second cipher stream needed for decryption. With knowledge of the secondary key to be used, re-synchronization (along with new private key negotiation) at each instance of a ciphertext data packet loss is obviated.
REFERENCES:
patent: 4200770 (1980-04-01), Hellman et al.
patent: 4218582 (1980-08-01), Hellman et al.
patent: 4956863 (1990-09-01), Goss
patent: 5148485 (1992-09-01), Dent
patent: 5222140 (1993-06-01), Beller et al.
patent: 5253294 (1993-10-01), Maurer
patent: 5299263 (1994-03-01), Beller et al.
patent: 5319712 (1994-06-01), Finkelstein et al.
patent: 5438622 (1995-08-01), Normile et al.
patent: 5515441 (1996-05-01), Faucher
patent: 5546464 (1996-08-01), Raith et al.
Diffie, "The First Ten Years of Public-Key Cryptography", Proceedings of the IEEE vol. 76, No. 5, May 1988.
European Patent Office, Standard Search Report, Jun. 10, 1998, File No. RS 100645 US.
Barron Jr. Gilberto
Telefonaktiebolaget L M Ericsson (publ)
LandOfFree
Encryption of data packets using a sequence of private keys gene does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Encryption of data packets using a sequence of private keys gene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Encryption of data packets using a sequence of private keys gene will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2342834