European Union legalising zero-knowledge proofs of digital identities

On February 9, the Industry, Research and Energy committee approved amendments to the European Digital Identity framework 2014/910 including zero-knowledge proofs of digital identities:

• to the best of our knowledge, this is the first time zero-knowledge proofs are been included in legislation, thus validating and backing previous cryptographic research
• we celebrate that the definition used for zero-knowledge proofs (“zero knowledge proof means any cryptographic method by which a relying party can validate that a given statement based on the electronic attestation of attributes […] is true, without conveying any data related to those”) is broad enough to cover multiple approaches (current and forthcoming)

Calctopia is the pioneer in this technology with research ia.cr/2019/546 that started the first implementations of zero-knowledge proofs from biometric passports and identity cards, and subsequent research ia.cr/2021/669 including said zero-knowledge proofs within a blockchain: the only blockchain that is legal according to this forthcoming amendment to the European Digital Identity framework, positioning us at the forefront of this cryptographic revolution.