CryptTalk Pro

CryptTalk Pro - Secure call and instant messaging.
Provides maximum communication security and protects your sensitive calls from eavesdroppers!


** IMPORTANT: This is the Enterprise version, no public registration possible. A CryptTalk Pro corporate subscription is required to use this app. If you have no CryptTalk Pro subscription, please use the CryptTalk application.**

CryptTalk's Best Practice methodology ensures maximum security for your voice and instant message communications on your mobile phone. By using CryptTalk, you can be sure that your calls and messages cannot be compromised and what you say or message remains inaccessible to third parties.

CryptTalk is an Internet-based communications service, which guarantees communication security without the need for special hardware.

Main features:

- Secure peer-to-peer calling
- Encrypted conference calls (Client side mixed conference support)
- Secure instant messaging
- Easy to use
- Superior voice quality
- Worldwide coverage: As long as you can get online, CryptTalk can be used anywhere on the globe.
- Independent of your mobile network, phone number and carrier

Maximum security through Best Practice cryptography:

- End-to-end encryption: a central server is not involved in the encryption process
- Built on the most secure and widely used and audited algorithms
- Media encryption: AES-256 CTR
- Authentication: OTP (RFC4226), SIP Digest
- Key exchange: Elliptic Curve Diffie-Hellman with ephemeral keys signed using RSA-2048, end-to-end key exchange
- SRTP authentication: HMAC-SHA1
- Private key protection: Patented, proprietary method for top security
- Integrity protection: Signed Voice / IM packets
- RTP control data protection: Secure RTCP
- Perfect Forward Secrecy protection: Full support using ephemeral keys
- Replay Attack Protection: Key exchange with challenge-response
- Man-in-the-Middle (MITM) Protection: Diffie-Hellman key exchange messages signed using RSA-2048

The system is implemented in such a way that potential hackers are prevented from listening in, even if they have access to CryptTalk's system plans or the App's source code. Not even CryptTalk's developers can access your private data.