opensc: opensc (Tools and libraries for smart cards) opensc: opensc: OpenSC provides a set of libraries and utilities to work with smart opensc: cards. Its main focus is on cards that support cryptographic opensc: operations, and facilitate their use in security applications such as opensc: authentication, mail encryption and digital signatures. OpenSC opensc: implements the standard APIs to smart cards, e.g. PKCS#11 API, opensc: Windows Smart Card Minidriver and macOS CryptoTokenKit. opensc: opensc: opensc: