Concepts

Six ideas you need to work with Tamga. Each page takes a few minutes to read; the details and the binding rules are in the specifications.

Trust lists and federationHow does a verifier know that the institution behind a credential is real? Signed lists and a single root key.FederationEach country keeps its own list; Tamga brings the lists together and introduces them to each other. One anchor, many lists.Credential formatsSD-JWT VC and ISO mdoc: one credential, two formats — one for the internet, one for in person.IssuanceFrom the institution to the wallet: a QR offer or a request from the wallet, identity matching, wallet attestation (OpenID4VCI).PresentationFrom the wallet to the verifier: a signed request, only the requested fields, three outcomes (OpenID4VP).PrivacySelective disclosure, one copy per verifier, a pseudonym per site, age with a zero-knowledge proof.Revocation and freshnessStatus lists, prefetching and the "cannot be verified right now" outcome.

Tamga in one paragraph

Institutions (a university, a hospital, a ticket seller) issue digital credentials to people; the credential lives in the wallet on the person's phone. When an employer, a website or a gate asks for it, the person shows only the fields that are needed; the doğrulayıcı (verifier)Gösterilen belgeyi denetleyen taraf: imza, belge verenin güven listesindeki kaydı, durum ve politika. Relying party diye de anılır. checks the signature, the institution's entry in the güven listesi (trust list)Bir ülkenin kök sertifikalarını, belge verenlerini ve kayıtlı relying party'lerini taşıyan imzalı liste. Bugün Tamga'da güven bu listelere dayanır; ortak defter sonra gelir. and the revocation status in seconds, without asking the source. The formats and protocols are the same as the EU digital identity wallet (eIDAS (electronic IDentification, Authentication and trust Services)AB'nin elektronik kimlik ve güven hizmetleri tüzüğü; eIDAS 2.0 Avrupa Dijital Kimlik Cüzdanı'nı getirir. 2.0 / EUDI WalleteIDAS 2.0'ın tanımladığı Avrupa Dijital Kimlik Cüzdanı; Tamga aynı biçim ve protokolleri kullanır.); any wallet and verifier that follows Tamga's rules works on the network.