Decentralized Trusted Timestamping using the Crypto Currency Bitcoin

Understand

Trusted timestamping is a process for proving that certain information existed at a given point in time.

• This paper presents a trusted timestamping concept and its implementation in form of a web-based service that uses the decentralized Bitcoin block chain to store anonymous, tamper-proof timestamps for digital content.
• The service allows users to hash files, such as text, photos or videos, and store the created hashes in the Bitcoin block chain.
• Users can then retrieve and verify the timestamps that have been committed to the block chain.