Apparatus and method for authenticating transmitting applications in an
interactive TV system
    53.
    发明授权
    Apparatus and method for authenticating transmitting applications in an interactive TV system 失效
    用于在交互式TV系统中认证传输应用的装置和方法

    公开(公告)号:US5625693A

    公开(公告)日:1997-04-29

    申请号:US499280

    申请日:1995-07-07

    摘要: An executable interactive program is combined with audio/video data for transmission. The program is divided into modules, similar to computer files, and a Directory Module is created which links program modules. Security for the executable application is provided by attaching a signed certificate to respective Directory Modules. The integrity of respective modules is monitored by hashing respective modules and including respective hash values in the Directory Module. A hash value of the Directory Module containing the other hash values is generated, encrypted and attached to the Directory Module. At a receiver the certificate is decoded and checked for authenticity of provider. If the certificate is authentic the program may be executed but only if receiver generated hash values of respective program modules are identical to corresponding hash values contained in the Directory Module.

    摘要翻译: 可执行交互程序与音频/视频数据组合以进行传输。 该程序分为模块,类似于计算机文件,并创建一个链接程序模块的目录模块。 通过将签名的证书附加到相应的目录模块来提供可执行应用程序的安全性。 通过散列相应的模块并在目录模块中包括各自的散列值来监视各个模块的完整性。 包含其他哈希值的目录模块的哈希值生成,加密并附加到目录模块。 在接收机处,证书被解码并检查提供商的真实性。 如果证书是真实的,则程序可以被执行,但是仅当接收器生成的各个程序模块的散列值与目录模块中包含的相应散列值相同时才可以执行。