Which of the following is NOT a characteristic of a good hash function?

A good hash function is defined by several key characteristics that ensure its effectiveness in cryptographic applications and data integrity checks. One critical characteristic of a good hash function is its deterministic output, meaning that the same input will always produce the same hash output. This is essential for validating data integrity, as you need to consistently generate the same hash for the same data.

Fast computation is also a hallmark of a quality hash function. It should be efficient in processing data, providing quick hash calculations to suit high-performance applications without sacrificing security.

Collision resistance means it is hard to find two different inputs that produce the same output. This property is crucial because it prevents malicious actors from substituting one piece of data for another without detection.

The option regarding the ease of reverse-engineering contrasts sharply with the properties of an effective hash function. A good hash function should be designed to be difficult, if not impossible, to reverse-engineer. This ensures that the original data cannot be reconstructed from the hash, thus maintaining confidentiality and security.