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    • 1. 发明申请
    • EFFICIENT MANAGEMENT OF CRYPTOGRAPHIC KEY GENERATIONS
    • 重要关键生成的有效管理
    • WO2005038818A9
    • 2005-06-09
    • PCT/SE2004001466
    • 2004-10-13
    • SELANDER GOERANLINDHOLM FREDRIKNYSTROEM MAGNUS
    • SELANDER GOERANLINDHOLM FREDRIKNYSTROEM MAGNUS
    • H04L9/08
    • H04L9/0861H04L9/0891H04L2209/38
    • The invention generally relates to management of cryptographic key generations in an information environment comprising a key-producing side generating and distributing key information to a key-consuming side. A basic concept of the invention is to define, by means of a predetermined one-way key derivation function, a relationship between generations of keys such that earlier generations of keys efficiently may be derived from later ones but not the other way around. A basic idea according to the invention is therefore to replace, at key update, key information of an older key generation by the key information of the new key generation on the key-consuming side. Whenever necessary, the key-consuming side iteratively applies the predetermined one-way key derivation function to derive key information of at least one older key generation from the key information of the new key generation. In this way, storage requirements on the key-consuming side can be significantly reduced.
    • 本发明一般涉及在信息环境中密码密钥世代的管理,包括密钥生成侧生成密钥信息到密钥消耗侧。 本发明的基本概念是通过预定的单向密钥导出函数来定义密钥的代数之间的关系,使得早期的密钥有效地可以从后者导出,而不是相反地导出。 因此,根据本发明的基本思想是通过关键消费侧的新密钥生成的密钥信息来代替关键更新时的老密钥生成的密钥信息。 只要有必要,关键消费方迭代地应用预定的单向密钥导出函数,从新密钥生成的密钥信息中导出至少一个较旧密钥生成的密钥信息。 以这种方式,可以显着减少关键消费方面的存储要求。