Patent ID: 6023689
Filing Date: 2000-02-08
Classification: G06Q,H04L

Abstract:
In a telecommunications system having a first and second transceiving device, wherein each of the first and second transceiving devices is assigned a decryption key and a public encryption key, and said second transceiving device is assigned identifying information, a method for providing secure communications, said method comprising the steps of:selecting a first session key at the second transceiving device;encrypting the first session key using the public encryption key of said first transceiving device to generate a first message in the second transceiving device;transmitting the first message to the first transceiving device;decrypting the first message, at the first transceiving device using the decryption key of the first transceiving device to generate said first session key;encrypting the identifying information in said second transceiving device using said first session key to generate a second message;transmitting said second message from the second transceiving device to the first transceiving device;decrypting the second message at the first transceiving device using said first session key to generate the identifying information;verifying the identity of the second transceiving device using the identifying information; andin response to a positive verification in said step of verifying the identity of the second transceiving device:selecting a second session key at said first transceiving device;encrypting said second session key using the public encryption key of the second transceiving device to generate a third message in the first transceiving device;transmitting said third message to the second transceiving device;decrypting said third message, at the second transceiving device using the decryption key of the second transceiving device to generate said second session key; andusing said second session key to encrypt subsequent communications between the first and second transceiving devices.