Description: 这是又一个加密算法源代码集合如elgamal,idea等50个算法-This is also an encryption algorithm source code pool as ElGamal, idea etc. 50 Algorithm Platform: |
Size: 220783 |
Author:伙同 |
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Description: Digital Signature Algorithm (DSA)是Schnorr和ElGamal签名算法的变种，被美国NIST作为DSS(DigitalSignature Standard)。算法中应用了下述参数：
p：L bits长的素数。L是64的倍数，范围是512到1024；
q：p - 1的160bits的素因子；
g：g = h^((p-1)/q) mod p，h满足h < p - 1, h^((p-1)/q) mod p > 1；
x：x < q，x为私钥 ；
y：y = g^x mod p ，( p, q, g, y )为公钥；
H( x )：One-Way Hash函数。DSS中选用SHA( Secure Hash Algorithm )。
p, q, g可由一组用户共享，但在实际应用中，使用公共模数可能会带来一定的威胁。签名及验证协议如下：
1. P产生随机数k，k < q；
2. P计算 r = ( g^k mod p ) mod q
s = ( k^(-1) (H(m) + xr)) mod q
签名结果是( m, r, s )。
3. 验证时计算 w = s^(-1)mod q
u1 = ( H( m ) * w ) mod q
u2 = ( r * w ) mod q
v = (( g^u1 * y^u2 ) mod p ) mod q
若v = r，则认为签名有效。
DSA是基于整数有限域离散对数难题的，其安全性与RSA相比差不多。DSA的一个重要特点是两个素数公开，这样，当使用别人的p和q时，即使不知道私钥，你也能确认它们是否是随机产生的，还是作了手脚。RSA算法却作不到。
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Size: 136954 |
Author:wildkaede |
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Description: C语言编写的ELGAMAL加密解密算法，在vc6.0下编译通过-ElGamal encryption algorithm written in C and compiled in vc6.0 by Platform: |
Size: 92160 |
Author:lan |
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Description: 看雪《加密解密第三版》随书光盘的第6章。
内含md5 sha aes idea tea rsa elgamal 椭圆曲线 base64 等常见加解密算法，因此特地从中抽出，以便学习。
感兴趣的同学，可以购买原书，这是一本国人写的关于软件破解与软件保护的优秀著作。-See Chapter 6 of the Snow encryption and decryption of the third edition of the CD with the book. Contains md5 sha the aes idea the tea the rsa elgamal elliptic curve base64 common encryption and decryption algorithm specially withdrawn from, in order to learn. Interested students can purchase the original book, which is a national people write excellent books on the software and software protection. Platform: |
Size: 4931584 |
Author:jt |
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Description: ElGamal algorithm not only used for data encryption can be used for digital signatures, their safety depends on the calculation of a finite field discrete logarithm this problem. Key to the method. First of all, choose a prime number p, the two random numbers, g and x, g, x <p, computing y = g ^ x (mod p), for its public key y, g and p. Private key is x. g and p by a group of users to share. ElGamal for digital signatures. Information was signed M, first choose a Platform: |
Size: 512000 |
Author:HamzaAnwer |
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Description: this el gamal algorithm, you can download it if you want.-this is el gamal algorithm, you can download it if you want. Platform: |
Size: 6144 |
Author:suleiman |
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Search - elgamal algorithm