Method and system for the generation and validation of personal identification numbers
US8870084B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2012 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Jul 19, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0869
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for encoding and decoding sequential index numbers to pseudo-random Personal Identification Codes (PINs) of varying word size in disclosed. The word size is defined by a word size control variable. The encoding and decoding process utilizes a symmetric, secret key, block encryption/decryption method. The index numbers are encrypted and the output result produces the PIN numbers. The encryption process may be reversed to a decryption process using a mode control input. When reversed to decryption, the PIN numbers are translated back into the original index numbers utilizing the same secret key for encryption. The block size of the encryption/decryption method is matched to the word size control variable. The word size defines the maximum number of index number/PIN code pairs. There is a one-to-one correspondence between a single index number and the resulting PIN number, thus forming a unique ordered pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.