Secret communication and authentication scheme based on public key cryptosystem using N-adic expansion
    1.
    发明授权
    Secret communication and authentication scheme based on public key cryptosystem using N-adic expansion 失效
    基于使用N-adic扩展的公钥密码系统的秘密通信和认证方案

    公开(公告)号:US06259790B1

    公开(公告)日:2001-07-10

    申请号:US08907852

    申请日:1997-08-08

    IPC分类号: H04L930

    CPC分类号: H04L9/302 H04L9/3249

    摘要: A secret communication and authentication scheme based on a public key cryptosystem in which a decryption speed is improved while maintaining a security level. In the RSA type secret communication, a plaintext is expressed in a form of a k-digit base n number and a ciphertext is obtained by applying a calculation using the first public key n and the second public key e to the base n number and transmitted. Then, from the received ciphertext, a lowest digit of the base n number is decrypted by using the first public key n and the second secret key d, upper digits of the base n number are sequentially decrypted by using a decrypted value of the lowest digit of the base n number at the receiver side, and the plaintext is recovered by using decrypted values of respective digits of the base n number. The Rabin type secret communication can also be realized by the similar scheme. Moreover, the same principle of the base n pubic key cryptosystem can also be used in realizing the RSA type or the Rabin type Authentication.

    摘要翻译: 基于密钥密码系统的秘密通信和认证方案,其中在保持安全级别的同时提高解密速度。 在RSA型秘密通信中,明文以k位数n号的形式表示,并且通过将使用第一公开密钥n和第二公开密钥e的计算应用于基本n号并发送来获得密文 。 然后,从接收到的密文中,通过使用第一公钥n和第二秘密密钥d对基数n的最低位进行解密,通过使用最低数字的解密值来对基数n的高位进行解密 在接收机侧的n个号码,并且通过使用基本n号码的各个数字的解密值来恢复明文。 拉宾式秘密通信也可以通过类似的方案来实现。 此外,基本的公钥密码体制的相同原理也可以用于实现RSA类型或Rabin类型认证。

    Scheme for fast realization of encrytion, decryption and authentication
    2.
    发明授权
    Scheme for fast realization of encrytion, decryption and authentication 失效
    快速实现加密,解密和认证的方案

    公开(公告)号:US06396926B1

    公开(公告)日:2002-05-28

    申请号:US09280150

    申请日:1999-03-26

    IPC分类号: H04B928

    CPC分类号: H04L9/302 H04L9/3236

    摘要: A new scheme for fast realization of encryption, decryption and authentication which can overcome the problems of the RSA cryptosystem is disclosed. The encryption obtains a ciphertext C from a plaintext M according to C≡Me (mod n) using a first secret key given by N (≧2) prime numbers p1, p2, . . . , pN, a first public key n given by a product p1k1 p2k2 . . . pNkN where k1, k2, . . . , kN are arbitrary positive integers, a second public key e and a second secret key d which satisfy ed≡1 (mod L) where L is a least common multiple of p1−1, p2−1, . . . , pN−1. The decryption recovers the plaintext M by obtaining residues Mp1k1, Mp2k2, . . . , MpNkN modulo p1k1, p2k2, . . . , pNkN, respectively, of the plaintext M using a prescribed loop calculation with respect to the first secret key p1, p2, . . . , pN, and by applying the Chinese remainder theorem to the residues Mp1k1, Mp2k2, . . . , MpNkN. This encryption/decryption scheme can be utilized for realizing the authentication.

    摘要翻译: 公开了一种快速实现加密,解密和认证的新方案,可以克服RSA密码系统的问题。 加密使用由N(> = 2)素数p1,p2给出的第一秘密密钥,根据C = Me(mod n)从明文M获得密文C. 。 。 ,pN,由产品p1k1 p2k2给出的第一公钥n。 。 。 pNkN其中k1,k2,... 。 。 ,kN是任意正整数,满足ed = 1(mod L)的第二公钥e和第二秘密密钥d,其中L是p1-1,p2-1的最小公倍数。 。 。 ,pN-1。 解密通过获得残差Mp1k1,Mp2k2,来恢复明文M。 。 。 ,MpNkN模p1k1,p2k2,。 。 。 分别使用相对于第一秘密密钥p1,p2的规定的循环计算的明文M的pNkN。 。 。 ,pN,并且通过将中文余数定理应用于残差Mp1k1,Mp2k2,...。 。 。 ,MpNkN。 该加密/解密方案可用于实现认证。

    Carriers for catalysts
    3.
    发明授权
    Carriers for catalysts 失效
    催化剂载体

    公开(公告)号:US4284675A

    公开(公告)日:1981-08-18

    申请号:US155034

    申请日:1980-05-30

    IPC分类号: B01J37/02 B32B3/12

    CPC分类号: B01J37/024 Y10T428/24149

    摘要: A carrier comprising a ceramic substrate, an active alumina coating formed thereon and at least one sinter inhibitor such as Mg dispersed in the active alumina-coated substrate, the carrier having excellent heat resistance and great thermal shock resistance and enabling a catalyst to be carried thereon to keep its catalytic activity substantially invariable even at high temperatures.

    摘要翻译: 一种载体,其包含陶瓷基材,形成在其上的活性氧化铝涂层和分散在活性氧化铝涂覆的基材中的至少一种烧结抑制剂如分散在其中的Mg,所述载体具有优异的耐热性和良好的耐热冲击性,并使催化剂能够在其上承载 即使在高温下仍保持其催化活性基本上不变。