Making digital content court-admissible: eIDAS timestamps and e-signatures (opens in new tab)

When you create a file, sign a contract, or publish something online, how do you prove to a court that it existed at a given moment, unchanged, and that you authored it?The EU's eIDAS regulation gives two primitives for exactly this:- Qualified timestamps — a trusted authority cryptographically attests that the hash of your content existed at a specific time. Change one byte and the hash no longer matches.- Advanced / qualified e-signatures — bind a document to a signer with legal weight acro...