Blind encryption

Details Blind encryption Blind encryption

1997-04-09

1998-06-09

Cangialogi, Salvatore

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 30, H04L 930

Patent

active

057647682

ABSTRACT:
A method of processing encrypted communications sent by a first party, the method including the steps of: receiving from the first party a message that has a first part, a second part, a third part and a fourth part, wherein the first part includes a first block of information that is encrypted by using a key k1, the second part includes a second block of information that is encrypted by using a key k2, the third part includes a third block of information that is encrypted by using a key R, and the fourth part includes a fourth block of information that is encrypted by using the key R, wherein the third block of information includes k1 and the fourth block of information includes k2; blinding the fourth part; sending the third part and the blinded fourth part to a recryptor; receiving from the recryptor the k1 key re-encrypted by using a first key; and receiving from the recryptor a fifth block of information which is the blinded fourth block of information that has been encrypted by using a second key.

REFERENCES:
patent: 4759063 (1988-07-01), Chaum
patent: 4949380 (1990-08-01), Chaum
patent: 4987593 (1991-01-01), Chaum
patent: 5200999 (1993-04-01), Matyas et al.
patent: 5557678 (1996-09-01), Ganesan
patent: 5633933 (1997-05-01), Aziz
patent: 5638445 (1997-06-01), Spelman et al.

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