公开(公告)号：US06377692B1

公开(公告)日：2002-04-23

申请号：US09142929

申请日：1999-03-11

申请人： Yoshio Takahashi ,  Hidemi Moribatake

发明人： Yoshio Takahashi ,  Hidemi Moribatake

IPC分类号： H04K104

CPC分类号： H04L9/3247 ,  H04L9/16

摘要： Two keys which are updated in the same updating cycle at different times are prepared as signature keys (main key and auxiliary key) for electronic signature, and the updating cycle of each key is divided into, for example, three periods. The first and last periods after the updating are used for the auxiliary key while the intermediate period is used for the main key, and an electronic signature is carried out with the main key. The electronic signature is confirmed with either of two confirmation keys which are updated synchronously with updating the two keys used as the signature keys. This eliminates the need of stopping issuance of the electronic signature or limiting a service offer upon updating the signature keys.

摘要翻译： 在不同时间以相同的更新周期更新的两个密钥被准备为用于电子签名的签名密钥（主密钥和辅助密钥），并且每个密钥的更新周期被划分为例如三个周期。 更新后的第一个和最后一个周期用于辅助键，而中间周期用于主键，并且使用主键执行电子签名。 电子签名用两个确认键中的任一个确认，这两个确认键与更新用作签名密钥的两个密钥同步更新。 这消除了在更新签名密钥时停止发行电子签名或限制服务报价的需要。

公开(公告)号：US06393078B1

公开(公告)日：2002-05-21

申请号：US09229467

申请日：1999-01-13

申请人： Frank Sattler

发明人： Frank Sattler

IPC分类号： H04K104

CPC分类号： G06F1/04

摘要： In a clock modulator for modulating a basic clock signal to form a system clock signal for a digital system containing at least one microprocessor and/or other digital module, the system clock signal generating an interference spectrum with interference spikes in the digital system, it is provided that the clock modulator (11) can be adapted as a function of the interference spectrum of the system clock signal (4) in the digital system (5) in such a way that the amplitudes of the interference spikes are reduced.

摘要翻译： 在用于调制基本时钟信号以形成包含至少一个微处理器和/或其他数字模块的数字系统的系统时钟信号的时钟调制器中，系统时钟信号在数字系统中产生具有干扰尖峰的干扰谱， 条件是时钟调制器（11）可以以数字系统（5）中的系统时钟信号（4）的干扰频谱的方式适应，使得干扰尖峰的幅度减小。

公开(公告)号：US06501841B1

公开(公告)日：2002-12-31

申请号：US09216476

申请日：1998-12-17

申请人： David M. Horne

发明人： David M. Horne

IPC分类号： H04K104

CPC分类号： H04J13/00 ,  H04L27/2602

摘要： One embodiment of the present invention is a method for providing security for a transmission of information in an ADSL environment using a DMT modulation technique. The order of the frequency orthogonal subchannels used in the DMT technique is scrambled according to a permutation cipher. The key for this scrambling operation is scrambled with the subscriber's public key, and is encoded according to a CDMA technique for transmission through the ADSL channel approximately concurrently with the information. The encoded key and the DMT data subblocks are recovered from the secured transmission. The encoded key is decoded according to the CDMA technique to generate the decoded key. The decoded key is used to assign an order to the subblocks of data.

摘要翻译： 本发明的一个实施例是一种使用DMT调制技术在ADSL环境中提供信息传输的安全性的方法。 在DMT技术中使用的频率正交子信道的顺序根据置换密码进行加扰。 该加扰操作的关键是用用户的公共密钥进行加密，并且根据CDMA技术进行编码，以便通过ADSL信道与信息大致同时传输。 编码密钥和DMT数据子块从安全传输中恢复。 编码密钥根据CDMA技术被解码以产生解码的密钥。 解码的密钥用于向数据的子块分配一个顺序。

公开(公告)号：US06501840B1

公开(公告)日：2002-12-31

申请号：US09245935

申请日：1999-02-05

申请人： Takeshi Saijo

发明人： Takeshi Saijo

IPC分类号： H04K104

CPC分类号： H04L9/06 ,  H04L2209/20

摘要： The output data storage unit 126 allocates a memory area and stores cipher text and plain text; the input data size calculation unit 127 calculates the sizes of cipher text and plain text; the type storage unit 128 stores a cryptographic processing type and an algorithm type; the type providing unit 129 outputs the cryptographic processing type and the algorithm type to the type information storage unit 113; the type information storage unit 113 stores an output size table, cryptographic processing type information, and algorithm type information; the output data size judgement unit 114 calculates an output data size according to an input data size, the cryptographic processing type, and the algorithm type.

摘要翻译： 输出数据存储单元126分配存储区域并存储密文和纯文本; 输入数据大小计算单元127计算密文和明文的大小; 类型存储单元128存储加密处理类型和算法类型; 类型提供单元129将密码处理类型和算法类型输出到类型信息存储单元113; 类型信息存储单元113存储输出大小表，密码处理类型信息和算法类型信息; 输出数据大小判断单元114根据输入数据大小，密码处理类型和算法类型来计算输出数据大小。