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Encrypted message communication

  • US 10,356,058 B2
  • Filed: 10/01/2015
  • Issued: 07/16/2019
  • Est. Priority Date: 10/01/2015
  • Status: Active Grant
First Claim
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1. A computer-implemented method for communicating message data from a sender computer to a receiver computer via a network, the method comprising, at the sender computer:

  • encrypting, by a processor, the message data in dependence on a cryptographic key to produce a ciphertext;

    establishing, by the processor, an access password for the ciphertext with a host computer connected to the network and sending the access password to the host computer with the ciphertext;

    sending, by the processor, the ciphertext via the network to the host computer for storage in association with the access password by the host computer; and

    sending, by the processor, over the network, an email message containing said cryptographic key in cleartext, to the receiver computer via the network without requiring said processor to encrypt said cryptographic key;

    wherein the cryptographic key comprises a random cryptographic value which is independent of the access password, said receiver computer configured to decrypt the ciphertext using said cryptographic key to obtain said message data.

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