Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2011-04-19
2011-04-19
Song, Hosuk (Department: 2435)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S173000, C713S189000, C726S010000
Reexamination Certificate
active
07930541
ABSTRACT:
An E-mail communication apparatus relays an E-mail transmitted from a source to a destination, stores information indicating a destination and an electronic certificate of the destination in a correspondence, receives the E-mail in which an address of the source and an address of the destination are specified; refers a certificate storage unit when a transmit command for the E-mail is issued for the E-mail received by a receiving unit, determines whether or not the electronic certificate of the destination of the E-mail is stored and, when the electronic certificate is stored, encrypts the E-mail with the electronic certificate, requests the destination to transmit the electronic certificate when it is determined that the electronic certificate is not stored, and transmits the encrypted request mail to the destination.
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Official communication issued in couterpart Japanese Application No. 2006-351274, mailed on Oct. 21, 2008.
Official communication issued in counterpart Japanese Application No. 2006-351274, mailed on Mar. 10, 2009.
Official Communication issued in corresponding European Patent Application No. 07023378.8, mailed on Sep. 4, 2009.
Stallings, “Cryptography and Network Security: Principles and Practice”, Cryptography and Network Security: Principles and Practice, Jan. 1, 1998, pp. 182-185.
Keating & Bennett LLP
Murata Machinery Ltd.
Song Hosuk
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