标准摘要
[中文适用范围]： 时间戳服务提供数据项在某个时间点之前存在的证据。 时间戳服务生成时间戳令牌，这些令牌是包含数据项表示和时间值之间可验证的加密绑定的数据结构。 ISO/IEC 18014的这一部分定义了产生独立令牌的时间戳机制，这些令牌可以被一一验证。 [外文原描述]： ISO/IEC 18014-2:2002 describes time-stamping services producing independent tokens. 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. The usage of independent tokens presumes a high trust on the time-stamping authority (TSA). Three independent mechanisms are currently covered: Time-stamps using digital signatures In this mechanism the TSA has an asymmetric key pair, and uses the private key to digitally sign the time-stamp token. Signature verification will use the public key. This mechanism may require the use of a PKI (Public Key Infrastructure). Time-stamps using message authentication codes In this mechanism the TSA uses a secret key to digitally bind the time association. The time-stamp token is authenticated using a Message Authentication Code (MAC). When using this mechanism, the TSA is needed to carry out the verification. Time-stamps using archiving In this mechanism the TSA returns a time-stamp token that only has reference information to bind the time-stamp to the messageImprint in the time-stamp token. The TSA archives locally enough information to verify that the time-stamp is correct.
英文名称Information technology - Security techniques - Time-stamping services - Part 2: Mechanisms producing independent tokens