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Efficient methods for protecting identity in authenticated transmissions

  • US 10,313,110 B2
  • Filed: 03/13/2018
  • Issued: 06/04/2019
  • Est. Priority Date: 01/13/2014
  • Status: Active Grant
First Claim
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1. An access device comprising:

  • a processor; and

    a non-transitory computer-readable storage medium comprising code executable by the processor for implementing a method comprising;

    receiving a message including a blinded user device public key and encrypted user device data from a user device, wherein the blinded user device public key is generated by the user device obfuscating a user device public key using a cryptographic nonce, the cryptographic nonce being a randomly generated value or a pseudo-randomly generated value, and wherein user device data is encrypted by the user device using a shared secret to obtain the encrypted user device data, the shared secret being different from the cryptographic nonce;

    generating the shared secret using an access device private key and the blinded user device public key, the access device private key associated with an access device public key; and

    decrypting the encrypted user device data using the shared secret.

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