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Password-based generation and management of secret cryptographic keys

  • US 10,057,060 B2
  • Filed: 08/18/2017
  • Issued: 08/21/2018
  • Est. Priority Date: 08/26/2014
  • Status: Active Grant
First Claim
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1. A user computer, comprising:

  • a memory having computer readable program instructions;

    a processor, wherein the processor, in response to retrieval and execution of the computer readable program instructions, causes the user computer to perform operations comprising;

    communicating by the user computer with a server via a network to generate a secret cryptographic key of the user computer,the server storing a secret server value and a check value which encodes a secret user value of the user computer and a user password,the communicating comprising;

    encoding, in response to input via the user interface of an input password, the secret user value and the input password to produce a first value corresponding to the check value, and to communicate the first value to the server via the communications interface;

    generating,in response to receiving from the server a second value produced by encoding the first value and the secret server value when the first value and the check value are compared to determine that the input password equals the user password,the secret cryptographic key by encoding the second value, the input password and the secret user value;

    and performing, using the secret cryptographic key, a cryptographic operation on data.

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