What Does Hash Chain Mean?
A hash chain is commonly defined as the repeated application of a cryptographic hash function to a given data asset. This type of hash cryptography can be extremely useful in some specific security setups. By providing a successive chain, hash chains make it harder for a snooping hacker to hijack a data asset through applying a single input.
Techopedia Explains Hash Chain
The idea of a hash chain is that a user supplies an individual input on the first interaction or session, and then adds authenticating data on the next session. Over a set of sessions, those individual hash inputs create a “hash chain” that authenticates a single user input in a more profound way.