Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1997-04-01
2000-05-09
Hayes, Gail O.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 49, 380 25, H04L 900
Patent
active
06061448&
ABSTRACT:
A method and system are provided for secure document delivery over a wide area network, such as the Internet. A sender directs a Delivery Server to retrieve an intended recipient's public key. The Delivery Server dynamically queries a certificate authority and retrieves the public key. The public key is transmitted from the Delivery Server to the sender. The sender encrypts the document using a secret key and then encrypts the secret key using the public key. Both encrypted document and encrypted secret key are uploaded to the Delivery Server, and transmitted to the intended recipient. The intended recipient then uses the private key associated with the public key to decrypt the secret key, and uses the secret key to decrypt the document. In an alternative, equally preferred embodiment of the invention, the sender uses the public key to encrypt the document. In yet another embodiment, the server transmits the document to the Delivery Server for encryption.
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Bandini Jean-Christophe
Smith Jeffrey C.
Glenn Michael A.
Hayes Gail O.
Ivey James D.
Song Ho S.
Tumbleweed Communications Corp.
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