Computer encryption involves keys which are numbers. The key length refers to the number of digits or bits in the key, and thus indicates the biggest number that can be used as a key, thereby defining the number of possible keys. The longer the key length (or the greater the number of possible keys), the longer it will take a cryptanalyst to test all the keys.

The number of bits in an encryption mode. Increasing the key length causes an increase in key space- making information more secure and harder to decrypt. See also: key space, encryption, bit.

The size of a key and measure of its strength. In simplistic terms a 40/384-bit secret/public key system may be classified as weak, a 56/512-bit system as borderline: and an 80/1024-bit system as strong

the length of a key, expressed in bytes.

The number of data bits in an encryption key (e.g., 128-bit), Longer keys generally provide stronger security. See also: encryption key

The number of bits representing the key size; the longer the key, the stronger it is.

The number of bits representing key size. The longer the key, the stronger the security it provides.