Providing user notification signals in phones that use...

Details Providing user notification signals in phones that use... Providing user notification signals in phones that use...

2002-09-11

2009-08-04

Moazzami, Nasser G (Department: 2436)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Packet header designating cryptographically protected data

C380S247000, C380S255000, C370S352000, C370S394000, C455S410000

Reexamination Certificate

active

07571317

ABSTRACT:
A method for providing user notification signals in digital phone such as IP phones or cell phones that use encryption. In one embodiment, a digital phone receives an encrypted data packet. The phone determines that the encrypted data packet satisfies a criterion. The phone generates a user notification signal that is perceivable by a user of the phone in response to determining that the encrypted data packet does not satisfy the criterion. The user notification signal may comprise a tone, synthesized speech, or other signal that is audible in a handset or speaker of the phone. Alternatively, the user notification signal is visually displayed in an electronic display of the phone. The criterion may comprise a failure to authenticate one or more encrypted data packets that are provided to the phone in a secure protocol. The process may be performed at a voice gateway or cellular base station.

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