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System and method for secure access

  • US 8,762,726 B2
  • Filed: 03/21/2011
  • Issued: 06/24/2014
  • Est. Priority Date: 09/30/2003
  • Status: Active Grant
First Claim
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1. A method, performed by an authorization server, of securing access between a client having temporary connection to a computer via an access controller, said access controller for selectively passing instructions received from said client to said computer if a verification protocol utilizing a set of keys is met, said method comprising:

  • receiving a request from said access controller for an updated first key;

    authenticating said request;

    determining said updated first key and a second key corresponding to said updated first key;

    delivering said updated first key to said access controller; and

    wherein said verification protocol includes a generation of a random number by said client, an encryption of said random number by said client using said second key, a delivery of said random number and said encrypted random number from said client to said access controller, a decryption of said encrypted number using said updated first key by said access controller, a comparison of said random number and said decrypted number, and a decision to pass at least a portion of said instructions if said comparison finds a match of said random number with said decrypted number, and a decision not to pass said at least a portion of said instructions if no match is found.

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