Key Recovery Key recovery is a technology that allows a key to be revealed under certain circumstances without the owner of the key revealing it. See Question 7.12 for more on key recovery. Remote Access Secure remote access is another important application of cryptography. The basic system of passwords certainly gives a level of security for secure access, but it may not be enough in some cases. For instance, passwords can be eavesdropped, forgotten, stolen, or guessed.
Many products supply cryptographic methods for remote access with a higher degree of security.
Other Applications Cryptography is not confined to the world of computers. Another application is to protect phone calls from eavesdropping using voice encryption.