Encryption

Encryption makes it possible to:

• Prevent access to messages or files to those who do not have the encryption key
• Assure the authenticity of users or files (including the fact that files have not been modified)

Public Key Encryption involves the use of a pair of keys, a private key that is never disclosed to anyone else and a public key that can be used, for example, to encrypt material meant to be accessed only by the holder of the corresponding private key.

In general the length of the key determines how long it would take to "break" the encryption by brute force.
The U.S. has attempted to control the export of strong encryption products.

Encryption can help substantially to mitigate or reduce the following problems:

• Invasion of privacy
• Fraud and Theft
• Unauthorized access

Cross references:

• Privacy
• Security