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Password protection

  • US 7,602,910 B2
  • Filed: 11/17/2004
  • Issued: 10/13/2009
  • Est. Priority Date: 11/17/2004
  • Status: Active Grant
First Claim
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1. A method comprising:

  • concatenating a password with other data;

    generating a value based on the concatenated password and the other data;

    forming a first asymmetric key pair having a security level by performing a key generation computation on the value, the security level determined by the number of bits of a cryptography algorithm used to perform the key generation computation;

    formulating a self-signing pseudo public key certificate that includes the first asymmetric key pair, the self-signing pseudo public key certificate having a Public Key Infrastructure (PKI) format and is not issued by a PKI central certificate server;

    exporting the self signing pseudo public key certificate to an external device; and

    responsive to an authentication session, forming a second asymmetric key pair by performing a key generation computation as part of a digital signature logon process wherein the process relies at least in part on the self-signing pseudo public key certificate as exported to the external device.

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