Cryptography – Cellular telephone cryptographic authentication
Reexamination Certificate
2008-04-08
2008-04-08
Zand, Kambiz (Department: 2136)
Cryptography
Cellular telephone cryptographic authentication
C380S249000, C380S270000, C455S411000
Reexamination Certificate
active
09896399
ABSTRACT:
Arranging data ciphering in a telecommunication system comprising at least one wireless terminal, a wireless local area network and a public land mobile network. At least one first ciphering key according to the mobile network is calculated in the mobile network and in the terminal for a terminal identifier using a specific secret key for the identifier. Data transmission between the mobile network and the terminal is carried out through the wireless local area network. A second ciphering key is calculated in the terminal and in the mobile network using said at least one first ciphering key. The second ciphering key is sent from the mobile network to the wireless local area network. The data between the terminal and the network is ciphered using said second ciphering key.
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Ala-Laurila Juha
Honkanen Jukka-Pekka
Rinnemaa Jyri
Connolly Bove & Lodge & Hutz LLP
Nokia Corporation
Shiferaw Eleni A
Zand Kambiz
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