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Use of encryption for secure communication exchanges

  • US 7,788,491 B1
  • Filed: 11/10/2005
  • Issued: 08/31/2010
  • Est. Priority Date: 10/21/2005
  • Status: Expired due to Fees
First Claim
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1. A computer-implemented method for exchanging secure communications between an access control device and a client device, the method comprising:

  • transmitting, by said access control device, a broadcast message that includes a first public key, wherein said broadcast message is transmitted via an unsecure transmission and wherein said client device is not in possession of said first public key prior to receiving said broadcast message;

    receiving, by said access control device, a response to said broadcast message from said client device, wherein said response is encrypted with said first public key and contains a second public key;

    utilizing a first private key to decrypt said response so as to retrieve said second public key;

    communicating one or more messages to said client device, wherein said one or more messages are encrypted with said second public key, andutilizing said first public key and said second public key to establish a secure communication channel between said client device and said access control device.

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