Definition ∞ Hash based security relies on cryptographic hash functions to protect data integrity, verify authenticity, and secure digital transactions. These functions convert input data of any size into a fixed-size output string, or hash, which is unique and computationally irreversible. Any alteration to the original data results in a completely different hash, making tampering detectable.
Context ∞ Hash based security is a foundational element frequently referenced in crypto news when discussing blockchain technology, particularly in explanations of how blocks are linked and transactions are secured. Its continued relevance is evident in advancements in post-quantum cryptography, where researchers explore new hash-based signatures to counter potential threats from future quantum computing capabilities.
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