http://www.cnblogs.com/waxdoll/archive/2007/07/30/tripledes.html
一个关于TripleDES的demo。
图1 TripleDES demo
为什么TripleDES的公钥只能是16或24字节？
1
TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
2
3for (int i = 0; i < tdes.LegalKeySizes.Length; i++)
4
{
5
MessageBox.Show(
6 "密钥的最大长度：/t" + tdes.LegalKeySizes[i].MaxSize.ToString() + "/r/n" +
7 "密钥的最小长度：/t" + tdes.LegalKeySizes[i].MinSize.ToString() + "/r/n" +
8 "有效密钥之间的间隔：/t" + tdes.LegalKeySizes[i].SkipSize.ToString() + "/r/n" +
9 "[单位为位(bit)]/r/n/r/n/r/n" +
10 "∵ 192 - 64 = 128/r/n" +
11 "∴ TripleDES算法的密钥长度只可能是：24(192 ÷ 8 = 24)和16(128 ÷ 8 = 16)[单位为字节(byte)]"
12 , "关于TripleDES算法密钥的说明"
13 );
14
}
15
16tdes = null;
TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();2
3
for (int i = 0; i < tdes.LegalKeySizes.Length; i++)4
{5
MessageBox.Show(6
"密钥的最大长度：/t" + tdes.LegalKeySizes[i].MaxSize.ToString() + "/r/n" +7
"密钥的最小长度：/t" + tdes.LegalKeySizes[i].MinSize.ToString() + "/r/n" +8
"有效密钥之间的间隔：/t" + tdes.LegalKeySizes[i].SkipSize.ToString() + "/r/n" +9
"[单位为位(bit)]/r/n/r/n/r/n" +10
"∵ 192 - 64 = 128/r/n" +11
"∴ TripleDES算法的密钥长度只可能是：24(192 ÷ 8 = 24)和16(128 ÷ 8 = 16)[单位为字节(byte)]"12
, "关于TripleDES算法密钥的说明"13
);14
}15
16
tdes = null;
图2 关于TripleDES算法密钥的说明