ISO/IEC 18014

ISO/IEC 18014 Information technology — Security techniques — Time-stamping services is an international standard that specifies time-stamping techniques. It comprises three parts:

Part 1: Framework

In this first part of ISO/IEC 18014, several things are explained and developed:

The identification of the objectives of a time authority.
The description of a general model on which time stamping services are based.
The definition of time stamping services.
The definition of the basic protocols of time stamping.
The specifications of the protocols between the involved entities.

Key words: audit, non-repudiation, security, time-stamp

Part 2: Mechanisms producing independent tokens

A time-stamping service provides evidence that a data item existed before a certain point in time. Time-stamp services produce time-stamp tokens, which are data structures containing a verifiable cryptographic binding between a data item's representation and a time-value. This part of ISO/IEC 18014 defines time-stamping mechanisms that produce independent tokens, which can be verified one by one.

Part 3: Mechanisms producing linked tokens

This part of ISO/IEC 18014:

Describes a general model for time-stamping services producing linked tokens.
Describes the basic components used to construct a time-stamping service of this type.
Defines the data structures used to interact with a time-stamping service of this type.
Describes specific instances of such time-stamping services.

ISO/IEC 18014-3:2004 describes time-stamping services producing linked tokens, that is, tokens that are cryptographically bound to other tokens produced by these time-stamping services. It describes a general model for time-stamping services of this type and the basic components used to construct a time-stamping service of this type, it defines the data structures and protocols used to interact with a time-stamping service of this type, and it describes specific instances of such time-stamping services.

References

ISO catalogue

Cryptography

History of cryptography Cryptanalysis Outline of cryptography

Symmetric-key algorithm Block cipher Stream cipher Public-key cryptography Cryptographic hash function Message authentication code Random numbers Steganography

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