The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2016
Filed:
Apr. 22, 2009
Chunyan HU, Kowloon, HK;
Shek Duncan Wong, Kowloon, HK;
Xiaotie Deng, Hong Kong, HK;
Qiong Huang, Kowloon, HK;
Guomin Yang, Kowloon, HK;
Chunyan Hu, Kowloon, HK;
Shek Duncan Wong, Kowloon, HK;
Xiaotie Deng, Hong Kong, HK;
Qiong Huang, Kowloon, HK;
Guomin Yang, Kowloon, HK;
CITY UNIVERSITY OF HONG KONG, Kowloon, HK;
Abstract
Transaction systems and methods for advancing a committed time in the future are described herein. In the present transaction systems and methods, the first end can be permitted to pre-hatch a time capsule signature before the committed time. The time capsule signature scheme here is conducted based on an identity-based trapdoor relation (IDTR). Moreover, an extended time capsule signature scheme is conducted based on an extended identity-based trapdoor relation (IDTR). By using an extended IDTR primitive, the present transaction systems and methods can distinguish the time capsule signature is validated before or after the committed time t.