SIGNATURE GENERATION DEVICE, KEY GENERATION DEVICE, AND SIGNATURE GENERATION METHOD
    5.
    发明公开
    SIGNATURE GENERATION DEVICE, KEY GENERATION DEVICE, AND SIGNATURE GENERATION METHOD 有权
    DEVICE签名生成装置:用于签名生成密钥生成和方法

    公开(公告)号:EP1843512A4

    公开(公告)日:2008-12-10

    申请号:EP06711788

    申请日:2006-01-17

    申请人: PANASONIC CORP

    IPC分类号: H04L9/32 H04L9/14

    摘要: There is provided a signature generation apparatus capable of preventing transcript attack on signature data. The signature generation apparatus for generating signature data for message data (i) acquires, according to a predetermined acquisition method, a private key, which is different from a private key used in a previous digital signature operation, from among a plurality of private keys generated using a key generation method of a signature scheme in which the plurality of private keys correspond to a single public key, and (ii) performs, using the acquired private key, a digital signature operation on the message data according to a signature method of the signature scheme to generate the signature data.