Silentel SecureCall

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Silentel SecureCall^® is the application by Ardaco that applies encryption to phone calls over a GSM network preventing eavesdropping. It has two modifications - Standard (software) and Professional (with security hardware device).

[edit] Features of the Silentel SecureCall

It enables the encryption of the voice communication through the mobile phone in the GSM network
It uses the algorithm AES with a 256-bit key for encryption - with the power of the call protection at the level required for the TOP SECRET information (e.g. for the Government, Secret Services and the Army)
It uses the one-time encryption keys - there are always new keys created with every new phone call. The key used with the current phone call will automatically be deleted after the completion of the communication
The algorithm Diffie - Hellman provides an exchange of the one-time keys
The algorithm RSA authenticates the phone call
It can be used in any GSM network 900/1800/1900 which supports the data call (CSD) and the data transfer through the GPRS
It supports roaming - the call encryption works also abroad depending on the operator
The voice quality is the same as with the regular phone call - AMR voice compression
The mobile phone with the operating system Symbian is required at present
It absolutely supports an upgrade through the GPRS - you can download all the updates and adjustments for the future phones by installing the new version