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System and method of sort-order preserving tokenization

  • US 8,739,265 B2
  • Filed: 04/19/2012
  • Issued: 05/27/2014
  • Est. Priority Date: 04/27/2011
  • Status: Active Grant
First Claim
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1. A method of obfuscating data in a data object, comprising:

  • receiving, by an intercepting proxy server computer, the data object from a client device;

    at the intercepting proxy server computer, generating a modified data object for transmission to a server computer in a cloud, comprising;

    (i) identifying a real data element in the data object;

    (ii) creating a token having a token value;

    (iii) generating a sort-order preserving prefix based on the real data element;

    (iv) concatenating the sort-order preserving prefix and the token value to generate a replacement value; and

    (v) replacing the real data element with the replacement value, thus generating the modified data object;

    further comprising;

    receiving a returned data object, comprising a returned data element, from the server computer in the cloud;

    identifying the returned data element as a token-to-be-replaced;

    replacing the token-to-be-replaced with the real data element, thereby generating a modified returned data object; and

    transmitting the modified returned data object to the client device.

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