Definition ∞ Collision Resistant Hash Functions are cryptographic algorithms that map arbitrary-sized data to a fixed-size output, known as a hash value, such that finding two different inputs that produce the same hash output is computationally infeasible. This property ensures data integrity and authenticity. Any alteration to the input data results in a completely different hash value.
Context ∞ These functions are a fundamental building block for blockchain technology, securing the integrity of transaction data and block structures. The continued strength of blockchain networks relies on the computational difficulty of finding hash collisions. Researchers consistently evaluate the robustness of current hash functions against new attack methods, ensuring the long-term immutability of digital records.
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