2 results about "Format-preserving encryption" patented technology

Disclosed herein are system, method, and computer program product embodiments for tokenization by obfuscating a length of personal information through addition of one or more digits and modifying a base of the input string before encryption. In one process, a security string is added to a user information input string of a first length and first base to generate a second string of a longer length, a format preserving encryption (FPE) is performed to generate a new string of the another length and base, and converted into a token of the first length but different base.

A computer-implemented method of tokenisation is described. A first value for a data field is provided, which is determined in accordance with a set of data field rules - this is carried out for a set of first values which are or represent account numbers for payment devices. These are stored in a secure database. For each of this set of first values, some or all places in the data field of the first value are encrypted using format preserving encryption to provide an encrypted first token also complying with the set of data field rules. The set of encrypted first tokens is used in place of the set of first values in one or more operations associated with the data field in performance or authorisation of a digital transaction in a computing environment, within a transaction processing system, that is directly accessible to human operators. A computing device adapted to implement such a method is also described.