A salami attack is collecting small amounts of data in order to build something of greater value and involves an attacker changing the information in a database. The attacker steals a little bit at a time over a long period of time from a large number of transactions.

A data diddling attack involves an attacker changing the information in a database. Future transactions use the modified data for illicit purposes.

Skimming is the theft of payment card information used in an otherwise legitimate transaction.

A denial-of-service (DoS) attack is an attempt to make a machine or network resource unavailable to its intended users, such as to temporarily or indefinitely interrupt or suspend services of a host connected to the Internet.

Bologna attack is a distractor.