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Secure transmission system

DC
  • US 6,760,752 B1
  • Filed: 06/28/1999
  • Issued: 07/06/2004
  • Est. Priority Date: 06/28/1999
  • Status: Expired due to Term
First Claim
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1. A method for transferring a message securely from a sender to a recipient over a network, the method comprising:

  • at each transfer creating a message;

    retrieving a current public key of the recipient from an external public key server just prior to sending the message;

    signing the message using a private key of the sender;

    encrypting the signed message using a public key encryption algorithm and the current public key of the recipient producing an encrypted signed message;

    generating a message addressed to the recipient;

    attaching the encrypted signed message as an attachment to the generated message; and

    transmitting the generated message to the recipient.

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