TopSec GSM
The TopSecGSM is the first tap-proof mobile telephone on the market. The basis of the TopSec GSM is the renowed Siemens dualband mobile phone S35i. The core, however, is the crypto module which has been completely integrated into the S35i. Encrypted speech is transmitted on the transparent GSM data channel. To attain highest security, two algorithms are combined; an asymmetrical algorithm with a 1024-bit key for key agreement and a symmetrical algorithm with a 128-bit key for voice encryption.
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Rohde & Schwarz GmbH & Co. KG
8661A Robert Fulton Drive
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