Cryptographic Timestamp

Definition ∞ A cryptographic timestamp is a digital record that securely establishes the existence of data at a particular point in time. It employs cryptographic hashing to create a unique digital signature of the data, which is then linked to a specific time reference. This process ensures the integrity of the data and provides undeniable proof that the data existed in its current form before the timestamp was generated. Such timestamps are tamper-evident, as any alteration to the data would invalidate the hash.
Context ∞ Cryptographic timestamps are fundamental to the operation of blockchain technology, where transactions are grouped into blocks and chronologically ordered. Their relevance in crypto news often pertains to transaction finality, data integrity, and the immutability of distributed ledgers. Discussions frequently involve the security of timestamping mechanisms and their role in preventing retroactive data manipulation, a core tenet of blockchain trust.