Blockchain: Proof of Authenticity
Blockchain, a relative new technology, has proven to be tamper-proof and a great solution to certify all kinds of documents safely and to guarantee Authenticity. And at a very reasonable price.
It works by creating a unique electronic fingerprint (a hash) of any digital object, so not only PDF, but any electronic file. This electronic fingerprint is stored on a public Blockchain. (Don’t worry, not the document is stored, just the fingerprint, which cannot lead back to any useful information)
To verify the document (or object), just repeat the same steps: create the electronic fingerprint and send it to the Blockchain. If the electronic fingerprint is the same, the object is unchanged and is Authenticated. You will then also receive the original date and time the object was first stored on the Blockchain.
Blockchain will provide you with Proof of Authenticity and Proof of Existence in a certain point in time. Guaranteed tamper-proof.