Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate
2008-07-15
2008-07-15
Zia, Syed A. (Department: 2131)
Cryptography
Communication system using cryptography
Symmetric key cryptography
C380S255000, C380S277000, C380S042000, C380S037000
Reexamination Certificate
active
07400730
ABSTRACT:
An RNC server issues an encryption start instruction to a media gateway (MG) and a terminal. The MG and terminal, which have received the encryption start instruction, encrypt U-Plane information using a predetermined secret key, and adds a predetermined encryption start bit to the encrypted U-Plane information for transmission to a communication partner. The communication partner, upon detection of the encryption start information, decrypts the received U-Plane information using the predetermined secret key.
REFERENCES:
patent: 7058042 (2006-06-01), Bontempi et al.
patent: 2004/0122956 (2004-06-01), Myers et al.
patent: 1 049 287 (2000-11-01), None
patent: 1 085 778 (2001-03-01), None
patent: 01-120143 (1989-05-01), None
patent: 06-164573 (1994-06-01), None
patent: 06-237248 (1994-08-01), None
patent: 10-145351 (1998-05-01), None
patent: 11239125 (1999-08-01), None
patent: 2001-189721 (2001-07-01), None
patent: WO 99/26420 (1999-05-01), None
patent: WO 03/007569 (2003-01-01), None
patent: WO 03/028027 (2003-04-01), None
United Kingdom Search Report dated Sep. 29, 2004.
DoCoMo Techical Journal, vol. 9, No. 1, pp. 61-79.
Dickstein , Shapiro, LLP.
NEC Corporation
Zia Syed A.
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