Electrical computers and digital processing systems: support – Multiple computer communication using cryptography
Reexamination Certificate
2011-03-08
2011-03-08
Arani, Taghi T (Department: 2438)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
C713S151000, C713S152000, C713S153000, C713S165000, C380S259000, C380S270000, C380S277000, C380S278000, C380S279000, C380S280000, C380S281000, C380S283000, C380S284000, C709S237000
Reexamination Certificate
active
07904709
ABSTRACT:
A system and method for controlling data communications between a server and a client device, such as a mobile device. Embodiments relate generally to a technique where stop data is provided to the client device. This stop data can be transmitted (e.g. by the client device) to the server. When processed by the server, the stop data indicates to the server that at least some of the encrypted data received by the client device from the server was not decrypted using the second key (e.g. as may be the case when the second key has been deleted). Upon receiving the stop data, the server may, for example, withhold the transmission of data encrypted with the first key to the client device until the second key is restored on the client device. In one embodiment, the stop data is provided to the client device in an encoded (e.g. encrypted) form.
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Bajar Dave
Brown Michael K.
Luk Philip
May Darrell
Arani Taghi T
Bereskin & Parr LLP / S.E.N.C.R.L., s.r.l.
Mehrmanesh Amir
Research In Motion Limited
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