摘要："Internet History" "Internet Technologe" "Internet Secure" 阅读全文

摘要：key Secret key(密钥）：ues the same key to Encryption and decryption（symmetric key）对称加密，需要绝对安全的空间来传递key Pulic kay(公钥）：ues different key to Encryption and 阅读全文

摘要：Store and Forward Networking Efficient Message Transmission:Packet Switching（分组交换） Challenge: in a simple approach, like store and forward, large mess 阅读全文

摘要：Alan Turing and Bletchley Park Top secret breaking effort(二战破译希特勒密码) 10,000 people at the peak(team effort) BOMBE:Mechanical Computer（“炸弹”密码破译机） Colos 阅读全文