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    • 7. 发明申请
    • METHOD FOR DATA ENCRYPTION IN AN ETHERNET PASSIVE OPTICAL NETWORK
    • 用于以太网被动光网络中数据加密的方法
    • WO2005086950A2
    • 2005-09-22
    • PCT/US2005/008150
    • 2005-03-10
    • TEKNOVUS, INC.,KRAMER, GlenDAVIS, LawrenceBOYD, EdwardHIRTH, RyanHO, Ngo Thanh
    • KRAMER, GlenDAVIS, LawrenceBOYD, EdwardHIRTH, RyanHO, Ngo Thanh
    • H04L9/00H04L9/12
    • H04L9/12H04L9/0637
    • One embodiment of the present invention provides a system that decrypts downstream data in an Ethernet passive optical network (EPON). During operation, the system receives a data frame which is encrypted based on a remote input block and a session key, wherein the remote input block is constructed based on a remote cipher counter and a remote block counter. The system adjusts a local cipher counter based on a received checksum located in a preamble of the data frame, wherein the local cipher counter is substantially synchronized with the remote cipher counter. In addition, the system truncates the local cipher counter by discarding n least significant bits thereof. The system then constructs a local input block based on the truncated cipher counter and a local block counter for the received data frame. Next, the system decrypts the data frame based on the local input block and the session key.
    • 本发明的一个实施例提供一种解密以太网无源光网络(EPON)中的下游数据的系统。 在操作期间,系统接收基于远程输入块和会话密钥加密的数据帧,其中基于远程密码计数器和远程块计数器构建远程输入块。 该系统基于位于数据帧的前导码中的接收到的校验和来调整本地密码计数器,其中本地密码计数器基本上与远程密码计数器同步。 此外,系统通过丢弃其最低有效位来截断本地密码计数器。 然后,系统基于截断的密码计数器和接收到的数据帧的本地块计数器构建本地输入块。 接下来,系统基于本地输入块和会话密钥来解密数据帧。