Which of the following is NOT a type of hashing technique?

A logical attack is not a type of hashing technique because it refers to a method of exploiting weaknesses in algorithms or protocols, rather than a specific process for converting data into a fixed-size string of characters. Hashing techniques, such as those represented by hash functions, transform input data into a hash value that is unique to that input.

In this context, dictionary attacks and brute force attacks are types of attacks that can be used to find passwords or decrypt hashed data, but they do not alter the concept of what a hashing technique entails. Hash functions are specifically designed to take input data (or a message) and return a hash value or hash code, making them essential for data integrity and security.