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1. 发明申请

WO1995015633A1 A NON-DETERMINISTIC PUBLIC KEY ENCRYPTION SYSTEM 审中-公开
标题翻译：非确定公共密钥加密系统
公开(公告)号：WO1995015633A1
公开(公告)日：1995-06-08
申请号：PCT/NZ1994000136
申请日：1994-12-01
申请人： RAIKE, William, Michael
IPC分类号： H04L09/30
CPC分类号： H04L9/0662 , H04L9/3066 , H04L9/3093 , H04L9/3226 , H04L9/3247 , H04L2209/043 , H04L2209/12
摘要： A non-deterministic public key encryption system whereby a public key is generated from a private key using mathematical operations equivalent to exponentiation in finite fields. Thus an attacker is required to compute logarithms over finite fields. Encryption involves generating a random initialisation key (R) which is used to (1) exponentiate the message receiver's public key (E) to produce initial values (K) for a pseudorandom binary mixture generator, and to (2) compute an open key (Q) by exponentiating an initial known generator state (a0). A ciphertext (C) is produced from plaintext (P) by clocking the mixture generator from the initial value (K) and combining the output keystream with the plaintext (P). The open key (Q) is attached to the ciphertext prior to transmission. Decryption involves extracting the open key (Q) and exponentiating this by the message receiver's private key (D) to compute (K) which is then used to set the initial value of a mixture generator. The mixture generator is clocked and its output keystream combined with the ciphertext (C) to produce plaintext (P). The invention may be implemented in special purpose hardware or in software for a general purpose processor.
摘要翻译：一种非确定性的公开密钥加密系统，其中使用与有限域中的求幂相等的数学运算从私钥生成公开密钥。因此，需要攻击者在有限域上计算对数。加密涉及生成随机初始化密钥（R），其用于（1）对消息接收者的公开密钥（E）进行求幂以产生用于伪随机二进制混合生成器的初始值（K），并且（2）计算打开密钥 Q）通过指数初始已知的生成器状态（a0）。通过从初始值（K）计时混合发生器并将输出密钥流与明文（P）组合，从明文（P）生成密文（C）。开放密钥（Q）在发送之前附加到密文。解密涉及通过消息接收者的私钥（D）提取开放密钥（Q）并对其进行指数计算（K），然后将其用于设置混合发生器的初始值。混合发生器被计时，其输出密钥流与密文（C）组合以产生明文（P）。本发明可以用于专用硬件或用于通用处理器的软件中。

2. 发明申请

WO2002067548A1 ENCRYPTED MEDIA KEY MANAGEMENT 审中-公开
标题翻译：加密媒体关键管理
公开(公告)号：WO2002067548A1
公开(公告)日：2002-08-29
申请号：PCT/NZ2002/000018
申请日：2002-02-19
申请人： RPK NEW ZEALAND LIMITED , RAIKE, William, Michael , DONOVAN-SMITH, Brian, James , HIGGINS, Sean, Joseph , MARTIN, Patrick, John
发明人： RAIKE, William, Michael , DONOVAN-SMITH, Brian, James , HIGGINS, Sean, Joseph , MARTIN, Patrick, John
IPC分类号： H04L009/32
CPC分类号： H04L9/083 , G06F21/10 , H04L9/0825 , H04L63/0442 , H04L63/062 , H04L2209/60 , H04L2463/101 , H04N7/1675 , H04N21/2541 , H04N21/63345 , H04N21/63775 , H04N21/835
摘要： A key or licence management system for the secure online distribution of digitised audio-visual works ("media") using encryption techniques. Encrypted media is stored on a media server (8) while the encryption keys are stored on a media key server (3). Users acquire rights from online retailers (11) to obtain from the media key server (8) keys corresponding to the media they wish to play. The key server (8) encrypts keys before releasing them, preferably with the user's public key (4) using a public key encryption algorithm. Media keys are stored in volatile memory (6) at the user's client device (10) and thus the user is in receipt of the key just in time to play the media.
摘要翻译：用于使用加密技术安全在线分发数字化视听作品（“媒体”）的关键或许可证管理系统。加密媒体存储在媒体服务器（8）上，而加密密钥存储在媒体密钥服务器（3）上。用户从网络零售商（11）获取权利，从媒体密钥服务器（8）获得与他们想要播放的媒体相对应的密钥。密钥服务器（8）使用公共密钥加密算法优先用用户公开密钥（4）解密之前对密钥进行加密。媒体密钥存储在用户的客户端设备（10）的易失性存储器（6）中，因此用户正在及时接收密钥以播放媒体。

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