(Internet) An attack that uses a list of words (from a dictionary) to try to guess passwords or decryption keys

An attack on a human by a shark.

present participle of counter-attack

simple past tense and past participle of counter-attack

(chess) An attack revealed when one piece moves out of the way of another.

(computing) An attack that subverts a reputation system by forging identities in peer-to-peer networks.

(chess) An unconventional chess opening in which White immediately moves the king knight's pawn two squares ahead.

(UK, slang, derogatory) A fit of foolish rage; a tantrum.

(computer security) A largely obsolete form of denial-of-service attack, involving broadcasting ICMP packets with the intended victim's IP address to a large computer network, causing the victim's computer to be overwhelmed by the response packets from the network.

(computing) An attack against a system that consists of many minor actions (such as stealing small amounts of funds from multiple bank accounts) and is thus relatively difficult to detect.