RSA Laboratories’ PKCS Series - a Tutorial

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Presentation transcript:

RSA Laboratories’ PKCS Series - a Tutorial Magnus Nyström October, 1999

Cryptographic Token Interface Standard Different from other PKCS documents in that it defines an application programming interface (API) Shields applications from details of cryptographic tokens such as smart cards Concentrates on cryptographic matters The API is written for ANSI C Also known as “Cryptoki”

Cryptographic Token Interface Standard, II Widely used in many token-aware products, e.g. Netscape Communicator Simplified user model: Just one user and a security officer (SO)

General model

PKCS #11’s object model Objects may be created, read, updated and deleted All access is governed by security states

PKCS #11 states (or sessions)

PKCS #11 Read-write sessions

Functional overview General purpose functions Initialize, cleanup, information about the library itself Slot and token management GetSlotInfo, GetTokenInfo,… Session management OpenSession, CloseSession… Object management Create, Destroy, Copy

Functional overview, II Encryption functions Decryption functions Digest functions Signing functions MAC functions Key management (e.g. generate a key pair) Callbacks (e.g. error handling)

Future enhancements Support for new types of certificates (e.g. attribute certificates) Support for multiple PINs More fine-grained access control Support for “signature-only” keys Time plan: v2.1 in Q4’99 v3.0 perhaps Q3’00

More information As usual: http://www.rsasecurity.com/rsalabs/pkcs