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:
May. 01, 2012
Filed:
Sep. 17, 2004
Akira Jinzaki, Kawasaki, JP;
Jun Kawai, Kawasaki, JP;
Osamu Shimokuni, Kawasaki, JP;
Junichiro Shitami, Kawasaki, JP;
Akira Jinzaki, Kawasaki, JP;
Jun Kawai, Kawasaki, JP;
Osamu Shimokuni, Kawasaki, JP;
Junichiro Shitami, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A transmitter and a receiver each have an apparatus for carrying out retransmission processing at a TCP layer and an apparatus for carrying out encrypted-data communication at an IPSec layer. The apparatus operating at the IPSec layer has a buffer for storing encrypted data transmitted by the transmitter. When a request for retransmission of data is received from the receiver, in spite of an operation carried out at an IP layer, information available at the TCP layer is obtained and data corresponding to the encrypted data stored in the buffer is returned to the receiver in response to the request.