公开(公告)号：US4769777A

公开(公告)日：1988-09-06

申请号：US878254

申请日：1986-06-25

申请人： William D. Bittle ,  Ellwood P. McGrogan ,  Moishe Kleidermacher ,  Paul M. Yun

发明人： William D. Bittle ,  Ellwood P. McGrogan ,  Moishe Kleidermacher ,  Paul M. Yun

IPC分类号： H03K3/84 ,  G06F1/02

CPC分类号： H03K3/84

摘要： An apparatus for breaking the periodicity of the pseudorandom bit stream output from a linear sequence generator. The apparatus includes a ring oscillator which periodically corrupts the sequence of the generator. The level of the supply voltage applied to the logic elements of the ring oscillator is varied over time, thereby altering the oscillator output frequency. In a second embodiment, the temperature of the logic elements of the ring oscillator is varied over time, thereby also altering the oscillator output frequency. A system comprising four of the above-disclosed apparatus having different linear sequences and different corrupting influences, are multiplexed, wherein the multiplexing selection criterion is determined by a logical combination of the four linear sequences.

摘要翻译： 一种用于破坏从线性序列发生器输出的伪随机比特流的周期性的装置。 该装置包括周期性地破坏发生器序列的环形振荡器。 施加到环形振荡器的逻辑元件的电源电压的电平随时间变化，从而改变振荡器的输出频率。 在第二实施例中，环形振荡器的逻辑元件的温度随时间变化，从而也改变了振荡器的输出频率。 包括四个具有不同线性序列和不同腐蚀影响的上述公开装置的系统被多路复用，其中多路复用选择标准由四个线性序列的逻辑组合确定。

公开(公告)号：US06266418B1

公开(公告)日：2001-07-24

申请号：US09428844

申请日：1999-10-28

申请人： Matthew Carter ,  Frank Costantini ,  Moishe Kleidermacher ,  Ellwood McGrogan ,  Ronald Paraggio

发明人： Matthew Carter ,  Frank Costantini ,  Moishe Kleidermacher ,  Ellwood McGrogan ,  Ronald Paraggio

IPC分类号： H04L910

CPC分类号： H04L9/065 ,  H04L2209/12 ,  H04L2209/30

摘要： An encryption device for a telephone having a handset and a base unit is disclosed. The device includes a handset interface, a first converter, an encryption processor, a second converter, and a host interface. The handset interface receives analog output signals from the handset. The first converter converts the analog output signals into digital output signals. The encryption processor includes a compressor, a key manager, an encryptor, and a modulator. The key manager generates key material for encrypting the digital output signals. The compressor compresses the digital output signals, the encryptor encrypts the digital output signals based on the key material, and the modulator modulates the encrypted digital output signals. The second converter converts the encrypted digital output signals into encrypted analog output signals. The host interface receives the encrypted analog output signals from the encryption processor, and forwards the encrypted analog output signals to the base unit.

摘要翻译： 公开了一种具有手机和基座单元的电话机的加密装置。 该设备包括手机接口，第一转换器，加密处理器，第二转换器和主机接口。 手机接口从手机接收模拟输出信号。 第一个转换器将模拟输出信号转换为数字输出信号。 加密处理器包括压缩器，密钥管理器，加密器和调制器。 密钥管理器生成加密数字输出信号的关键材料。 压缩器压缩数字输出信号，加密器基于密钥材料加密数字输出信号，调制器对加密的数字输出信号进行调制。 第二个转换器将加密的数字输出信号转换成加密的模拟输出信号。 主机接口从加密处理器接收加密的模拟输出信号，并将加密的模拟输出信号转发到基本单元。