Alior Bank Uses Ethereum to authenticate documents

Alior Bank, a bank based in Warsaw, Poland, is using the public Ethereum blockchain to authenticate its clients’ documents, according to a report by Forbes on June 17. Alior clients can now verufy authenticity of documents via website link to public blockchain.

The blockchain technology lead at Alior, Piotr Adamczyk, explains, “We know exactly in which block of Ethereum the document with a given hash is published. If we know the block number, we also know the timestamp [...] We know that the document was published some time ago and hasn’t been changed in that time [if the hash stored on the blockchain is identical to the hash calculated from the document], so we can prove it hasn’t been replaced on our servers.”

Alior reportedly developed this blockchain solution in response to changing regulations in Poland, where the Office of Competition and Consumer Protection ruled in 2017 that website pages do not constitute a “durable medium” necessary for issuing customer documents — the issue being that website pages are too easily changed, making them not suitably durable.