In database management systems, a key is a field that you use to sort data. For example, if you sort records by age, then the age field is a key.
The use and management of cryptographic keys and associated hardware and software. It includes their generation, registration, distribution, installation, usage, protection, storage, access, recovery and destruction.
Cryptographic keys generated or used by cryptographic equipment or software.
Software that records which keys you press. Also known as keystroke logging.
Malicious software that records and 'logs' each key you press. These programs may be used to capture confidential information (such as login or financial details) and send to an attacker.