Question

Why can't I send a message to my friend? Says we need to exchange keys first.

Answer

Perform initial call and verify SAS

cgPhone prevents you securely from man-in-the-middle attacks by one-time exchange of phonetic keywords. This is a global standard for secure calling - Secure Key Exchange with SAS.

To assure secure communication, a key exchange is required at the first cgPhone call with each participant.

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