Meaning
Mathematical algorithms generate a unique 256-bit signature that identifies the exact state of a digital file at a specific moment. The use of sha-256 timestamping allows businesses to prove that a document existed and has not been altered since the seal was applied. This technology is a foundation of digital evidence in Chinese litigation.
Hashing Protocol
Converting the data of a file into a fixed-length string of characters ensures that even a single byte change will result in a completely different hash. Within sha-256 timestamping, the system combines this hash with a trusted time source provided by a national clock. The resulting token is cryptographically linked to the original document.
Temporal Verification
Proving the order of events is necessary in patent disputes. Because sha-256 timestamping relies on a one-way function, the process cannot be reversed to find original data. These tokens provide a high level of security.
Integrity Protection
Courts accept the timestamp as proof of integrity because any modification would break the link to the hash token. While the content remains private, the sha-256 timestamping process offers a public way to verify the version of the document. This method is cheaper and faster than traditional notarization for high-volume transactions and is recognized under the Electronic Signature Law.
