US 8,897,441 B2Granted

Packet transmitting and receiving apparatus and packet transmitting and receiving method

AssigneeFujitsu Limited

InventorsToshifumi Inoue, Isamu Fukuda, Kenji Fukuda, Kiyohisa Hoshino, Nobuyuki Fukuda, Yoshiaki Fukunaga, Satoru Hirasawa

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Abstract

When being triggered by a call setting request that has been made, dummy information that is different from information to be transmitted and is information used for creating a path on which encrypted communication is to be performed is generated. The path on which the encrypted communication is to be performed is established by using the generated dummy information. A responding process of responding to the call setting request is performed after the path on which the encrypted communication is to be performed has been established. Thus, in the case where information that is obtained after the responding process of responding to the call setting request is encrypted and transmitted, it is possible to transmit the information while maintaining the real-time characteristics of the information to be transmitted.

Claims4

Dependent claims

A packet transmitting and receiving apparatus comprising:

a memory;
and
a processor coupled to the memory, wherein
the processor executes a process comprising:
generating dummy data to establish a security association for user data;
transmitting the dummy data to a transmission destination of the user data when the transmitting and receiving apparatus performs encrypted communication with the transmission destination of the user data bidirectionally, the dummy data making the transmission destination of the user data exchange an encryption key with the packet transmitting and receiving apparatus and the dummy data containing information which requests the transmission destination of the user that the transmission destination of the user return the dummy data to the transmitting and receiving apparatus, and not transmitting the dummy data to the transmission destination of the user data when the transmitting and receiving apparatus performs the encrypted communication with the transmission destination of the user data one-way;
establishing the security association for the user data in accordance with the dummy data.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/781,435Filed 17 May 2010
Priority: JP 2009-12678926 May 2009
Published: US 2010/0303233 A12 Dec 2010
Granted: 25 Nov 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04L 9/0841
Key agreement, i.e. key establishment technique in which a shared key is derived by parties as a function of information contributed by, or…:…
H04W 12/041
Key management, e.g. using generic bootstrapping architecture [GBA]: key generation or derivation
H04W 12/0471
Without using a trusted network node as an anchor: key exchange
H04L 63/0272
For separating internal from external traffic, e.g. firewalls: virtual private networks