FEATURE ENABLEMENT AT A COMMUNICATIONS TERMINAL
    2.
    发明申请
    FEATURE ENABLEMENT AT A COMMUNICATIONS TERMINAL 有权
    在通信终端的特征应答

    公开(公告)号:US20100017840A1

    公开(公告)日:2010-01-21

    申请号:US12174832

    申请日:2008-07-17

    IPC分类号: H04N7/173

    CPC分类号: H04N7/1675 H04N21/443

    摘要: In one embodiment, a method for electronic enablement of features at a communication device that includes receiving a feature token, validating the feature token, and changing the enablement state of one or more features at the communication device in accordance with a valid feature token.

    摘要翻译: 在一个实施例中,一种用于在通信设备处电子启用特征的方法,包括接收特征令牌,验证特征令牌,以及根据有效特征令牌在通信设备处改变一个或多个特征的启用状态。

    Preventing replay attacks on digital information distributed by network
service providers
    3.
    发明授权
    Preventing replay attacks on digital information distributed by network service providers 失效
    防止网络服务提供商分发的数字信息的重播攻击

    公开(公告)号:US6005938A

    公开(公告)日:1999-12-21

    申请号:US767535

    申请日:1996-12-16

    摘要: A technique for preventing replay attacks on digital information distributed by network service providers. At the beginning of a subscription period for a service, a network service provider sends entitlement messages to the subscriber which provide the subscriber for the service with a session key and authorization information. The authorization information specifies a service and a period of time. When an encrypted instance of a service is distributed on the network, it is accompanied by a series of entitlement control messages. Each of the messages includes a value which can be used with the session key to obtain a control word for decrypting the encrypted instance and a time specifier. The subscriber equipment which decrypts the instance of the service does so only if the time specifier in the entitlement control message specifies a time within the time period specified by the authorization information.

    摘要翻译: 一种防止网络服务提供商分发的数字信息的重放攻击的技术。 在服务的订阅周期开始时,网络服务提供商向订户发送授权消息,为订户提供会话密钥和授权信息。 授权信息指定服务和一段时间。 当服务的加密实例在网络上分发时,伴随着一系列授权控制消息。 每个消息包括可以与会话密钥一起使用以获得用于解密加密实例的控制字和时间说明符的值。 仅当授权控制消息中的时间指定者在授权信息指定的时间段内指定时间时,解密服务实例的用户设备才会这样做。