Patent · US Active

Revocation of cryptographic digital certificates

US8024562B2 · kind B2 · utility

112Cited by

24References

17Claims

0Family size

Assignee

NTT DOCOMO, INC. · JP

Inventors

Craig B. Gentry · Mountain View, US
Zulfikar Ramzan · San Mateo, US
Bernhard Bruhn · Stuttgart, DE

Key dates

Filing date	Jun 26, 2009
Grant date	Sep 20, 2011
Priority date	—
Expiry date	Jul 21, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/80
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

In the setup phase, the certification authority (CA 120) generates validation proof data structures for greater time than the maximum validity period of any digital certificate. Therefore, new certificates can be added to the existing data structures after the setup phase.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.