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    • 2. 发明申请
    • SYSTEMS AND METHODS FOR DEVICE AUTHENTICATION INCLUDING TIMESTAMP VALIDATION
    • 用于设备验证的系统和方法,包括TIMESTAMP验证
    • US20130004142A1
    • 2013-01-03
    • US13436927
    • 2012-03-31
    • Eric William GrabFrancis Yee-Dug ChanMichael George Kiefer
    • Eric William GrabFrancis Yee-Dug ChanMichael George Kiefer
    • H04N5/93
    • H04N5/913H04N21/2541H04N21/25816H04N21/44204H04N21/4627H04N2005/91364
    • Systems and methods for authenticating playback devices using timestamp validation in accordance with embodiments of the invention are disclosed. One embodiment includes measuring a time difference between the system clock and a clock on a remote server, retrieving at least one reference time difference from the playback device, where the reference time difference is stored in the playback device, determining whether the system clock of the playback device is valid by comparing the measured time difference to reference time difference, retrieving at least one timestamp when the measured time difference is valid, where each of the at least one timestamps is securely stored by the playback device in response to the occurrence of a predetermined event and is based on the current time of the system clock of the playback device when the predetermined event occurred, and determining whether the system clock is valid based upon the retrieved timestamp.
    • 公开了使用根据本发明的实施例的使用时间戳验证的用于认证回放设备的系统和方法。 一个实施例包括测量系统时钟和远程服务器上的时钟之间的时间差,从回放设备检索至少一个参考时间差,其中参考时间差被存储在回放设备中,确定系统时钟是否为 播放装置通过将所测量的时间差与参考时间差进行比较而获得是有效的,当所测量的时间差有效时,至少检索一个时间戳,其中至少一个时间戳中的每一个被回放装置安全地存储以响应于 并且基于当预定事件发生时回放设备的系统时钟的当前时间,并且基于检索到的时间戳来确定系统时钟是否有效。
    • 3. 发明申请
    • SYSTEMS AND METHODS FOR SECURING CRYPTOGRAPHIC DATA USING TIMESTAMPS
    • 使用时间戳来保存克隆数据的系统和方法
    • US20130007471A1
    • 2013-01-03
    • US13436930
    • 2012-03-31
    • Eric William GrabFrancis Yee-Dug ChanMichael George Kiefer
    • Eric William GrabFrancis Yee-Dug ChanMichael George Kiefer
    • G06F21/24G06F12/14
    • G06F21/10H04L2463/121
    • Systems and methods for authenticating playback devices using timestamp validation in accordance with embodiments of the invention are disclosed. One embodiment includes securely storing at least one timestamp in memory within a playback device in response to the occurrence of at least one predetermined event, where a stored timestamp is based on the current time of a system clock when an event occurs, generating a cryptographic key using the at least one timestamp, securing cryptographic data using the cryptographic key, receiving a request to playback encrypted content, where the encrypted content is accessible using the cryptographic data, accessing the at least one timestamp, generating the cryptographic key, accessing the cryptographic data using at least the cryptographic key, and playing back the content using the playback device.
    • 公开了使用根据本发明的实施例的使用时间戳验证的用于认证回放设备的系统和方法。 一个实施例包括响应于至少一个预定事件的发生,将重放设备内的至少一个时间戳安全地存储在存储器中,其中存储的时间戳基于事件发生时系统时钟的当前时间,产生加密密钥 使用所述至少一个时间戳记,使用所述加密密钥保护加密数据,接收对所述加密内容进行回放的请求,其中使用所述加密数据访问所述加密的内容,访问所述至少一个时间戳,生成所述加密密钥,访问所述加密数据 至少使用加密密钥,并使用回放设备回放内容。
    • 6. 发明授权
    • Systems and methods for securing cryptographic data using timestamps
    • 使用时间戳保护加密数据的系统和方法
    • US08938625B2
    • 2015-01-20
    • US13436930
    • 2012-03-31
    • Eric William GrabFrancis Yee-Dug ChanMichael George Kiefer
    • Eric William GrabFrancis Yee-Dug ChanMichael George Kiefer
    • H04L29/06G06F21/10
    • G06F21/10H04L2463/121
    • Systems and methods for authenticating playback devices using timestamp validation in accordance with embodiments of the invention are disclosed. One embodiment includes securely storing at least one timestamp in memory within a playback device in response to the occurrence of at least one predetermined event, where a stored timestamp is based on the current time of a system clock when an event occurs, generating a cryptographic key using the at least one timestamp, securing cryptographic data using the cryptographic key, receiving a request to playback encrypted content, where the encrypted content is accessible using the cryptographic data, accessing the at least one timestamp, generating the cryptographic key, accessing the cryptographic data using at least the cryptographic key, and playing back the content using the playback device.
    • 公开了使用根据本发明的实施例的使用时间戳验证的用于认证回放设备的系统和方法。 一个实施例包括响应于至少一个预定事件的发生,将重放设备内的至少一个时间戳安全地存储在存储器中,其中存储的时间戳基于事件发生时系统时钟的当前时间,产生加密密钥 使用所述至少一个时间戳记,使用所述加密密钥保护加密数据,接收对所述加密内容进行回放的请求,其中使用所述加密数据访问所述加密的内容,访问所述至少一个时间戳,生成所述加密密钥,访问所述加密数据 至少使用加密密钥,并使用回放设备回放内容。