Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1993-01-08
1994-04-12
Chan, Wing F.
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379 62, 379114, 3701101, H04M 1100
Patent
active
053032853
ABSTRACT:
In a wireless telephone service access method a caller is authenticated by: storing and keeping up to date in service control point databases words identifying each subscription and the corresponding telephone and a secret key; transmitting from the caller's telephone to a service control point words identifying the subscription and the caller's telephone; determining in the caller's telephone a first signature using the secret key and a random number; transmitting the first signature to said service control point over the user to user signaling channel; determining in said service control point a second signature using the secret key and said random number; verifying in said service control point that: the first and second signatures are identical; the word identifying the caller's subscription represents a valid subscription; and the word identifying the caller's subscription matches the word identifying the caller's telephone.
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Kerihuel Jean-Bernard
Martin Maurice
ALCATEL N.V.
Bost Dwayne D.
Chan Wing F.
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