Trusted platform module supported one time passwords
US8296841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2009 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Sep 7, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/34
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A Trusted Platform Module (TPM) can be utilized to implement One Time Password (OTP) mechanisms. One or more delegation blobs can be created by the TPM and the delegation authentication values of the delegation blobs can be based on the version number of the delegation blobs. A data blob with a protected secret can comprise a pointer to the delegation table of the TPM. The version number can be provided to an authority from which an OTP (a delegation authentication value) can be received. The OTP can be utilized to gain access to the secret and an authentication value of the key blob, which can be utilized to increase the version number of all associated delegation blobs. Policy limitations can be associated with the delegation blobs and can be enforced by policy enforcement mechanisms that can reference the TPM tick counter to enforce temporal policy restrictions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.