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1. 发明公开

EP0821504A3 Method and system for depositing private key used in RSA cryptosystem 失效
标题翻译：用于存储在RSA密码系统中使用的秘密密钥的方法和设备
公开(公告)号：EP0821504A3
公开(公告)日：2000-12-06
申请号：EP97112942.4
申请日：1997-07-28
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Obata, Masanori , Sugiyama, Hiroyuki , Okukawa, Moribumi , Okamoto, Tatsuaki
IPC分类号： H04L9/08
CPC分类号： H04L9/302 , H04L9/0822 , H04L9/0825
摘要： A scheme for depositing a private key used in the RSA cryptosystem which is capable of maintaining the private key more safely, without requiring a user to always carry around a storage medium. In this scheme, a private key of a user is divided into a first partial private key and a second partial private key at a user's entity, where the first partial private key is set to be maintained at the user's entity, while the second partial private key is deposited from the user's entity to the other entity. Then, the second partial private key is delivered from the other entity to the user's entity in response to a request from the user's entity, and the first partial private key maintained at the user's entity and the second partial private key delivered from the other entity are composed so as to obtain the private key to be used in a processing according to the RSA cryptosystem at the user's entity. This scheme can be generalized to a case of dividing the private key into a plurality of partial private keys.

2. 发明公开

EP0821504A2 Method and system for depositing private key used in RSA cryptosystem 失效
标题翻译：埃菲尔铁塔和爱因斯坦帝国在einem RSA-Kryptosystem benutztenGeheimschlüssels
公开(公告)号：EP0821504A2
公开(公告)日：1998-01-28
申请号：EP97112942.4
申请日：1997-07-28
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Obata, Masanori , Sugiyama, Hiroyuki , Okukawa, Moribumi , Okamoto, Tatsuaki
IPC分类号： H04L9/08
CPC分类号： H04L9/302 , H04L9/0822 , H04L9/0825
摘要： A scheme for depositing a private key used in the RSA cryptosystem which is capable of maintaining the private key more safely, without requiring a user to always carry around a storage medium. In this scheme, a private key of a user is divided into a first partial private key and a second partial private key at a user's entity, where the first partial private key is set to be maintained at the user's entity, while the second partial private key is deposited from the user's entity to the other entity. Then, the second partial private key is delivered from the other entity to the user's entity in response to a request from the user's entity, and the first partial private key maintained at the user's entity and the second partial private key delivered from the other entity are composed so as to obtain the private key to be used in a processing according to the RSA cryptosystem at the user's entity. This scheme can be generalized to a case of dividing the private key into a plurality of partial private keys.
摘要翻译：用于存储在RSA密码系统中使用的私钥的方案，其能够更安全地维护私钥，而不需要用户总是携带存储介质。在该方案中，用户的私钥在用户的实体被划分为第一部分私钥和第二部分私钥，其中第一部分私钥设置为维持在用户的实体，而第二部分私钥密钥从用户的实体存储到另一个实体。然后，响应于来自用户实体的请求，第二部分私钥从另一个实体传送到用户的实体，并且保持在用户实体的第一部分私钥和从另一个实体传递的第二部分私钥是组合以获得在用户实体的根据RSA密码系统的处理中使用的私钥。该方案可以推广到将私钥划分成多个部分私钥的情况。

3. 发明授权

EP0821504B1 Method and system for depositing private key used in RSA cryptosystem 失效
标题翻译：用于存储在RSA密码系统中使用的秘密密钥的方法和设备
公开(公告)号：EP0821504B1
公开(公告)日：2003-10-22
申请号：EP97112942.4
申请日：1997-07-28
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Obata, Masanori , Sugiyama, Hiroyuki , Okukawa, Moribumi , Okamoto, Tatsuaki
IPC分类号： H04L9/08
CPC分类号： H04L9/302 , H04L9/0822 , H04L9/0825

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