F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z

A security measure designed to verify the identity of a transmission, user, user device, entity, or data.

 Hidden software or hardware mechanism used to get around security controls.

A means of electronically capturing information from credit or debit card readers, such as ATMs

Malicious code that is embedded in seemingly safe data to break through firewalls

A decryption method that successively tries all similar words in a lengthy list

Hardware or software that permits only authorized users to enter, and logs attempted intrusions

Insertion of a large volume of data that results in service denial

An individual who attempts to gain unauthorized access to an information system 

Any type of software capable of performing an unauthorized process on an information system