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DigiDoc4 Client is a part of Estonian national ID-card software developed by governmental institution - Estonian Information System Authority.
DigiDoc4 Client is a program that can be used to sign digitally with ID-card, Mobile-ID and Smart-ID, check the validity of digital signatures, open and save documents inside the signature container, encrypt and decrypt files and review personal information stored on the ID-card. Digitally signed containers are files with .ddoc, .bdoc or .asice extensions, encrypted/decrypted files are with .cdoc extension.
Official builds are provided through https://installer.id.ee/
Binaries available at: