Encrypting variable-length passwords to yield fixed-length encrypted passwords
US8284933B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2009 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Mar 19, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, encrypting passwords includes performing the following for each input password of a plurality of input passwords to yield encrypted passwords, where at least two input passwords have different lengths and the encrypted passwords have the same length. An input password and a random number are received at logic configured to perform a key derivation operation comprising a pseudorandom function. An encryption key is derived from the input password and the random number according to the key derivation operation. The encryption key and a user identifier are received at logic configured to perform a cipher-based message authentication code (CMAC) function. An encrypted password is generated from the encryption key and the user identifier according to the CMAC function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.