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:
Sep. 21, 2010
Filed:
Nov. 15, 2004
Applicants:
Takehiro Ida, Yokosuka, JP;
Mitsuo Iwanaga, Yokohama, JP;
Yasushi Sakamoto, Yokohama, JP;
Inventors:
Assignee:
NTT DoCoMo, Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A communication device comprises a receiver configured to receive a notification of a cipher parameter used for encryption of data and a requested start time at which the encryption starts; and a correction unit configured to determine whether the cipher parameter needs to be corrected in response to the notification having been retransmitted based on the requested start time and an actual start time at which the encryption actually starts, and correct the cipher parameter.