Active leakage control in single-ended full-swing caches
    1.
    发明授权
    Active leakage control in single-ended full-swing caches 有权
    单端全频高速缓存中的主动泄漏控制

    公开(公告)号:US06781892B2

    公开(公告)日:2004-08-24

    申请号:US10033337

    申请日:2001-12-26

    IPC分类号: G11C700

    CPC分类号: G11C7/12

    摘要: A single-ended, full-swing dynamic cache having memory cells grouped into memory groups, where for each memory group one or more foot transistors connect to various memory cells within the memory group. Using a foot transistor reduces sub-threshold leakage current when the memory cells connected to the foot transistor are not being read.

    摘要翻译: 具有分组到存储器组中的存储器单元的单端,全摆幅动态高速缓存,其中对于每个存储器组,一个或多个脚晶体管连接到存储器组内的各种存储器单元。 当连接到脚晶体管的存储单元未被读取时,使用脚晶体管可以减小子阈值漏电流。

    Fast bit-parallel Viterbi decoder add-compare-select circuit
    2.
    发明授权
    Fast bit-parallel Viterbi decoder add-compare-select circuit 失效
    快速位并行维特比解码器加比较选择电路

    公开(公告)号:US07131055B2

    公开(公告)日:2006-10-31

    申请号:US10372121

    申请日:2003-02-25

    IPC分类号: H03M13/03

    CPC分类号: H03M13/6502 H03M13/4107

    摘要: A Viterbi decoder includes an ACS unit that performs state metric updates for every symbol cycle. State metric updates involve adding the state metrics corresponding to a likely input symbol to the respective branch matrix, comparing the results of the additions to determine which is smaller, and selecting the smaller result for the next state metric. The ACS unit includes two parallel adders followed by a parallel comparator that generates a multiplexer-select signal. The outputs of the parallel adders are input into a multiplexer and the multiplexer-select signal is input into the multiplexer for a decision.

    摘要翻译: 维特比解码器包括对每个符号周期执行状态度量更新的ACS单元。 状态度量更新涉及将对应于可能的输入符号的状态量度相加到相应的分支矩阵,比较添加的结果以确定哪个更小,并为下一状态度量选择较小的结果。 ACS单元包括两个并行加法器,其后是并行比较器,其产生多路选择器选择信号。 并行加法器的输出被输入到多路复用器中,并且多路复用器选择信号被输入到多路复用器中用于决定。

    Method and apparatus for efficiently implementing the advanced encryption standard
    3.
    发明授权
    Method and apparatus for efficiently implementing the advanced encryption standard 有权
    有效实施高级加密标准的方法和装置

    公开(公告)号:US08923510B2

    公开(公告)日:2014-12-30

    申请号:US11966658

    申请日:2007-12-28

    IPC分类号: H04L9/00 G06F7/00

    摘要: Implementations of Advanced Encryption Standard (AES) encryption and decryption processes are disclosed. In one embodiment of S-box processing, a block of 16 byte values is converted, each byte value being converted from a polynomial representation in GF(256) to a polynomial representation in GF((22)4). Multiplicative inverse polynomial representations in GF((22)4) are computed for each of the corresponding polynomial representations in GF((22)4). Finally corresponding multiplicative inverse polynomial representations in GF((22)4) are converted and an affine transformation is applied to generate corresponding polynomial representations in GF(256). In an alternative embodiment of S-box processing, powers of the polynomial representations are computed and multiplied together in GF(256) to generate multiplicative inverse polynomial representations in GF(256). In an embodiment of inverse-columns-mixing, the 16 byte values are converted from a polynomial representation in GF(256) to a polynomial representation in GF((24)2). A four-by-four matrix is applied to the transformed polynomial representation in GF((24)2) to implement the inverse-columns-mixing.

    摘要翻译: 公开了高级加密标准(AES)加密和解密过程的实现。 在S盒处理的一个实施例中,转换16字节值的块,每个字节值从GF(256)中的多项式表示转换为GF((22)4)中的多项式表示。 对于GF((22)4)中的每个对应多项式表示,计算GF((22)4)中的乘法逆多项式表示。 最后,对GF((22)4)中的相应的乘法逆多项式表示进行转换,并应用仿射变换以在GF(256)中生成对应的多项式表示。 在S盒处理的替代实施例中,计算多项式表示的幂并在GF(256)中相乘,以在GF(256)中生成乘法逆多项式表示。 在反列混合的实施例中,将16字节值从GF(256)中的多项式表示转换为GF((24)2)中的多项式表示。 将四乘四矩阵应用于GF((24)2)中的变换多项式表示,以实现反列混合。

    METHOD AND APPARATUS FOR EFFICIENTLY IMPLEMENTING THE ADVANCED ENCRYPTION STANDARD
    4.
    发明申请
    METHOD AND APPARATUS FOR EFFICIENTLY IMPLEMENTING THE ADVANCED ENCRYPTION STANDARD 有权
    有效执行高级加密标准的方法和设备

    公开(公告)号:US20090172068A1

    公开(公告)日:2009-07-02

    申请号:US11966658

    申请日:2007-12-28

    IPC分类号: G06F7/38

    摘要: Implementations of Advanced Encryption Standard (AES) encryption and decryption processes are disclosed. In one embodiment of S-box processing, a block of 16 byte values is converted, each byte value being converted from a polynomial representation in GF(256) to a polynomial representation in GF((22)4). Multiplicative inverse polynomial representations in GF((22)4) are computed for each of the corresponding polynomial representations in GF((22)4). Finally corresponding multiplicative inverse polynomial representations in GF((22)4) are converted and an affine transformation is applied to generate corresponding polynomial representations in GF(256). In an alternative embodiment of S-box processing, powers of the polynomial representations are computed and multiplied together in GF(256) to generate multiplicative inverse polynomial representations in GF(256). In an embodiment of inverse-columns-mixing, the 16 byte values are converted from a polynomial representation in GF(256) to a polynomial representation in GF((24)2). A four-by-four matrix is applied to the transformed polynomial representation in GF((24)2) to implement the inverse-columns-mixing.

    摘要翻译: 公开了高级加密标准(AES)加密和解密过程的实现。 在S盒处理的一个实施例中,转换16字节值的块,每个字节值从GF(256)中的多项式表示转换为GF((22)4)中的多项式表示。 对于GF((22)4)中的每个对应多项式表示,计算GF((22)4)中的乘法逆多项式表示。 最后,对GF((22)4)中的相应的乘法逆多项式表示进行转换,并应用仿射变换以在GF(256)中生成对应的多项式表示。 在S盒处理的替代实施例中,计算多项式表示的幂并在GF(256)中相乘,以在GF(256)中生成乘法逆多项式表示。 在反列混合的实施例中,将16字节值从GF(256)中的多项式表示转换为GF((24)2)中的多项式表示。 将四乘四矩阵应用于GF((24)2)中的变换多项式表示,以实现反列混合。

    Apparatus and method for an address generation circuit
    7.
    发明授权
    Apparatus and method for an address generation circuit 有权
    地址生成电路的装置和方法

    公开(公告)号:US07380099B2

    公开(公告)日:2008-05-27

    申请号:US10956164

    申请日:2004-09-30

    IPC分类号: G06F12/00

    CPC分类号: G06F7/507 G06F7/508

    摘要: A method and apparatus for an address generation circuit. In one embodiment, the method includes computing a carry-in for at least one group of a predetermined number of bits of a propagate and a generate signal formed from a plurality of logical address components. Once the carry-in is computed, a plurality of conditional sums are generated for a logic 0 carry-in and a logic 1 carry-in. Subsequently, a sum is selected from the plurality of conditional sums to form a first portion of an effective address from the logical address components in a first stage and a second portion of the effective address in a second stage. In one embodiment, a fully dynamic high-performance sparse tree adder circuit that generates one in four carries, is used to form an address generation circuit, in accordance with one embodiment. Other embodiments are described and claimed.

    摘要翻译: 一种用于地址产生电路的方法和装置。 在一个实施例中,该方法包括计算由多个逻辑地址分量形成的传播信号和生成信号的预定位数的至少一组的进位。 一旦计算了进位,则为逻辑0进位和逻辑1进位产生多个条件和。 随后,从多个条件和中选出一个和,以在第二阶段中的第一阶段的逻辑地址分量和有效地址的第二部分中形成有效地址的第一部分。 在一个实施例中,根据一个实施例,使用产生四分之一载波的完全动态的高性能稀疏树加法器电路来形成地址生成电路。 描述和要求保护其他实施例。

    APPARATUS AND METHOD FOR SKEIN HASHING
    9.
    发明申请
    APPARATUS AND METHOD FOR SKEIN HASHING 有权
    装置和方法进行滑雪

    公开(公告)号:US20120328097A1

    公开(公告)日:2012-12-27

    申请号:US13165269

    申请日:2011-06-21

    IPC分类号: H04L9/28

    摘要: Described herein are an apparatus and method for Skein hashing. The apparatus comprises a block cipher operable to receive an input data and to generate a hashed output data by applying Unique Block Iteration (UBI) modes, the block cipher comprising at least two mix and permute logic units which are pipelined by registers; and a counter, coupled to the block cipher, to determine a sequence of the UBI modes and to cause the block cipher to process at least two input data simultaneously for generating the hashed output data.

    摘要翻译: 这里描述了用于Skein散列的装置和方法。 该装置包括可以用于接收输入数据并通过应用唯一块迭代(UBI)模式来产生散列输出数据的块密码,所述块密码包括由寄存器流水线化的至少两个混合和置换逻辑单元; 以及耦合到所述块密码的计数器,以确定所述UBI模式的序列,并且使所述块密码同时处理至少两个输入数据以产生所述散列输出数据。

    Multiplicand shifting in a linear systolic array modular multiplier
    10.
    发明授权
    Multiplicand shifting in a linear systolic array modular multiplier 失效
    线性收缩阵列乘法器中的乘法运算

    公开(公告)号:US07693925B2

    公开(公告)日:2010-04-06

    申请号:US11242573

    申请日:2005-09-30

    IPC分类号: G06F7/72

    CPC分类号: G06F7/728 G06F5/01

    摘要: Embodiments of apparatuses and methods for multiplicand shifting in a linear systolic array modular multiplier are disclosed. In one embodiment, an apparatus includes two processing elements of a linear systolic array. One processing element includes multiplication logic, multiplicand shift logic, an adder, modulus logic, and modulus shift logic. The multiplication logic is to multiply a word of the multiplicand and a bit of the multiplier to generate a product. The multiplicand shift logic is to shift the word of the multiplicand. The adder is to add the product to a first running sum to generate a second running sum. The modulus logic is to conditionally add a word of a modulus and the second running sum. The modulus shift logic is to shift the word of the modulus. The next processing element includes logic to multiply the shifted word of the multiplicand and the next bit of the multiplier.

    摘要翻译: 公开了在线性收缩阵列模数乘法器中被乘数移位的装置和方法的实施例。 在一个实施例中,装置包括线性收缩阵列的两个处理元件。 一个处理元件包括乘法逻辑,被乘数移位逻辑,加法器,模数逻辑和模移位逻辑。 乘法逻辑是将被乘数的一个乘法和一个乘法器的乘法乘以产生乘积。 被乘数移位逻辑是移位被乘数的字。 加法器将产品加到第一个运行总和以产生第二个运行总和。 模数逻辑是有条件地添加一个单词的模数和第二个运行总和。 模数移位逻辑是移动模数的单词。 下一个处理元件包括用于乘法被乘数的移位的字和乘法器的下一位的逻辑。