首页>
外国专利>
Cryptographic and scrambling system utilising a shared medium passive optical network
Cryptographic and scrambling system utilising a shared medium passive optical network
展开▼
机译:利用共享介质无源光网络的加密和加扰系统
展开▼
页面导航
摘要
著录项
相似文献
摘要
An improved method and apparatus encrypts and scrambles information cells transmitted on a telephone system local loop (11') from a central office to a plurality of user premises networks (14') via a shared medium passive optical network. Prior to transmission, the information cell is encrypted for security purposes and scrambled to improve its transmission properties by modulo 2 addition (218) of the information cell and a combined (214) encryption (211) and scrambling sum (212) pattern. At the other end of the passive optical network which is connected to user premises networks, the received encrypted and scrambled information cells are used to generate a processed cell by the modulo 2 addition of the received cell and a combined decryption and descramble sum pattern.
展开▼