The Secure Voice software is a high security software to protect mobile  GSM communication. Depending on your needs and wishes, there are several versions of Secure Voice.

Secure Voice 3G uses Diffie-Hellman 4096 and AES 256, unique username and authentication password to encrypt conversation via LTE 4G, 3G (UMTS), 2G (EDGE) and Wi-Fi channels.

Secure Voice CSD uses RSA 1024 Session keys, AES 256 to ensure your privacy.

The software is matching TOP SECRET level of confidence.

Please read some notes from the security authorities before proceeding to full specs:

Asymmetric algorithms rely for their effectiveness on a class of problems in mathematics called one-way functions, which require relatively little computational power to execute, but vast amounts of power to reverse, if reversal is possible at all. … modern ciphers like AES and the higher quality asymmetric ciphers are widely considered unbreakable  [link to full text]

RSA Laboratories currently recommends key sizes of 1024 bits for corporate use and 2048 bits for extremely valuable keys like the root key pair used by a certifying authority. [link to full text]

The US Government announced that AES may be used for classified information:
"The design and strength of all key lengths of the AES algorithm (i.e., 128, 192 and 256) are sufficient to protect classified information up to the SECRET level. TOP SECRET information will require use of either the 192 or 256 key lengths."[link to full text]

Secure Voice technical specification:

Voice encryption algorithm AES 256 AES 256
Connection type P2P P2P or via server
Key exchange algorithm RSA / Diffie-Hellmann Diffie-Hellmann 4096
Key validity One conversation only, also more often change is possible on request One conversation only, also more often change is possible on request
Voice compression AMR-NB4.75 Kbps AMR-NB4.75 Kbps
Communication channel CSD (2G) 4G, 3G, Wi-Fi, EDGE (2G)
Security - voice encoding End-to-end End-to-end
Way of communication Full-duplex Full-duplex
Roaming support Yes, extra CSD number needed Worldwide roaming without additional costs
Man-in-The-Middle protection STS protocol STS protocol on request
Protection against eavesdropping equipment (hard- and software) Yes Yes
Voice quality Excellent, with almost no delays Excellent, delays only network driven
Server needed No Only if global IP not available
Switch to GSM call Possible, user defined Possible, user defined

Please also check the availability of Secure Voice for your Nokia device at devices section and request your free demo with us.

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