专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06788787B1 Pseudorandom number generator, stream encryption method, and stream encrypting communication method 失效
标题翻译：伪随机数发生器，流加密方法和流加密通信方法
公开(公告)号：US06788787B1
公开(公告)日：2004-09-07
申请号：US09512284
申请日：2000-02-24
申请人： Katsufusa Shono , Osamu Ueno , Tetsuya Ishihara
发明人： Katsufusa Shono , Osamu Ueno , Tetsuya Ishihara
IPC分类号： G06F102
CPC分类号： H04L9/001 , H04L9/0668 , H04L9/12 , H04L2209/12
摘要： A chaos-generating loop includes a one dimensional mapping circuit (13) with non-linear input-output characteristics for generating chaos, a linear or non-linear AD converter (15) for converting an analog output of the one dimensional mapping circuit (13) to digital form, a sample-and-hold circuit (17) for holding and outputting the digitally converted value from the AD converter (15), in response to an external clock (C), and a linear or non-linear DA converter (19) for converting an output of the sample-and-hold circuit (17) to analog form and outputting this analog signal to the one dimensional mapping circuit (13), and a decoder for outputting a chaos stream in response to the output of the sample-and-hold circuit (17).
摘要翻译：混沌生成环包括具有用于产生混沌的非线性输入 - 输出特性的一维映射电路（13），用于转换一维映射电路（13）的模拟输出的线性或非线性AD转换器（15））到数字形式，用于响应于外部时钟（C）保持和输出来自AD转换器（15）的数字转换值的采样和保持电路（17），以及线性或非线性DA转换器（19），用于将采样保持电路（17）的输出转换为模拟形式，并将该模拟信号输出到一维映射电路（13）;以及解码器，用于响应于输出采样保持电路（17）。

2. 发明授权

US06473448B1 Spread spectrum signal generation method, spread spectrum signal generator, stream encryption method, and stream enciphered codes communication method 有权
标题翻译：扩频信号生成方法，扩频信号发生器，流加密方式和流加密码通信方式
公开(公告)号：US06473448B1
公开(公告)日：2002-10-29
申请号：US09512317
申请日：2000-02-24
申请人： Katsufusa Shono , Tetsuya Ishihara
发明人： Katsufusa Shono , Tetsuya Ishihara
IPC分类号： H04B169
CPC分类号： H04B1/69
摘要： Arithmetic operation is started by substituting an initial value x(0) for a logistic mapping x(t+1)=4x(t){1x(t)} which is a symmetrical nonlinear mapping. The resultant value is again input into the logistic mapping x(t+1)=4x(t){(1−x(t)}, based on an feedback x(t)=x(t+1). This operation is repeated to obtain time series x(t)−t. Isomorphic transform and quantization corresponding to the time series x(t)−t is obtained based on y(t)=[{2/&pgr;·arc sin {square root over (0)}x(t))}·2n] while a quantizing resolution n=1 is substituted for y(t)=[{2/&pgr;·arc sin {square root over (0)}x(t)}·2n]. A time series y(t)−t is determined from the obtained isomorphic transform and quantization. A spread spectrum signal having, as a period thereof, binary code sequence y(t) arbitrarily sampled from the time series y(t)−t is generated.
摘要翻译：通过将初始值x（0）替换为对称非线性映射的对数映射x（t + 1）= 4x（t）{1x（t）}来开始算术运算。基于反馈x（t）= x（t + 1），将结果值再次输入到对数映射x（t + 1）= 4x（t）{（1-x（t）}）重复获得时间序列x（t）-t。基于y（t）= [{2 / pi.arc sin {平方根超过（0））获得与时间序列x（t）-t相对应的同构变换和量化）} x（t））} 2n]，而量化分辨率n = 1代替y（t）= [{2 / pi.arc sin {（0）} x（t）}的平方根2n] 。从获得的同构变换和量化确定时间序列y（t）-t。作为其周期，产生从时间序列y（t）-t任意采样的二进制码序列y（t）的扩频信号。

3. 发明授权

US07054446B2 Chaos cryptographic communication method and chaos cryptographic communication system 有权
公开(公告)号：US07054446B2
公开(公告)日：2006-05-30
申请号：US09855798
申请日：2001-05-16
申请人： Tetsuya Ishihara , Takahiro Abe , Katsufusa Shono
发明人： Tetsuya Ishihara , Takahiro Abe , Katsufusa Shono
IPC分类号： H04L9/00
CPC分类号： H04L9/001 , H04L9/0852 , H04L2209/805 , H04L2209/84
摘要： Each of plural CPUs enciphers a plaintext code which is a secrecy object according to chaos block encryption and then enciphers it according to chaos stream encryption. Then, it transmits an obtained cipher code through communication line. On the other hand, each of plural CPUs that received the cipher code synchronously restores the received cipher code according to chaos stream encryption and then restores according to chaos block encryption thereby to obtain an original plaintext code.

4. 发明授权

US07209885B1 Compressed code generating method and compressed code decompressing method 有权
标题翻译：压缩码生成方法和压缩码解压缩方法
公开(公告)号：US07209885B1
公开(公告)日：2007-04-24
申请号：US09786138
申请日：2000-06-28
申请人： Katsufusa Shono , Takahiro Abe
发明人： Katsufusa Shono , Takahiro Abe
IPC分类号： G06K9/36
CPC分类号： H03M7/30
摘要： A compressed-code generating method that is used for compressing information on characters including numerical data, sound and images, and a compressed-code expanding method that is used for restoring and expanding the compressed code generated by using the compressed-code generating method to the original information. Bit strings {y}1 and {y}2 are obtained respectively from a bit string {y} of information to be compressed. A reversible loop that exists in chaos is operated to these obtained bit strings, thereby to execute a reversible compression/expansion of the information using the chaos.
摘要翻译：一种压缩码产生方法，用于压缩包括数字数据，声音和图像的字符的信息，以及压缩码扩展方法，用于将通过使用压缩码产生方法生成的压缩码恢复和扩展到原始信息。分别从要压缩的信息的位串{y}获得位串{y} <1>和 2 。存在于混沌中的可逆循环对这些获得的位串进行操作，从而使用混沌执行信息的可逆压缩/扩展。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式