Data masking with an encrypted seed
US8375224B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2009 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | May 15, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/6218
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided for generating a masked value from a cryptographically transformed value by using the cryptographically transformed value as a random seed, without decrypting the cryptographically transformed value. A query is evaluated against a set of data to produce a result. The result may be cryptographically transformed or unencrypted. If the result is unencrypted, the result may be cryptographically transformed to produce a random seed. If the result is already cryptographically transformed, then the result is used as the random seed. The random seed is used to generate a masked value, without decrypting the cryptographically transformed random seed value. The masked value conforms to a particular data characteristic such as a data format or a data type, which may be determined from metadata stored in a database, received with a query, or gleaned from unencrypted data. The masked value is returned as a result of the query.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.