发明申请
- 专利标题: Method for data encryption in an ethernet passive optical network
- 专利标题(中): 以太网无源光网络数据加密方法
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申请号: US11078923申请日: 2005-03-10
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公开(公告)号: US20050201554A1公开(公告)日: 2005-09-15
- 发明人: Glen Kramer , Lawrence Davis , Edward Boyd , Ryan Hirth , Ngo Ho
- 申请人: Glen Kramer , Lawrence Davis , Edward Boyd , Ryan Hirth , Ngo Ho
- 主分类号: H04L9/00
- IPC分类号: H04L9/00 ; H04L9/12
摘要:
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.