Certified Blockchain Professional (CBCP) Exam

What is the key characteristic of a cryptographic hash function that ensures the immutability of a blockchain?

Its ability to reverse the hash to retrieve the original data. The generation of a variable-length output based on the input size. The avalanche effect, where a minor change in the input data results in a completely different hash output. The use of symmetric keys for both hashing and verification.

Correct Answer:

The avalanche effect, where a minor change in the input data results in a completely different hash output.

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