Four rounds of Blowfish are susceptible to a second-order differential attack (Rijmen, 1997);[1] for a class of weak keys, 14 rounds of Blowfish can be distinguished from a pseudorandom permutation (Vaudenay, 1996).
![Blowfish - Wikipedia](https://cdn-ak-scissors.b.st-hatena.com/image/square/c10c65392b66d54885caf4303c4a42e4d48f5bcd/height=288;version=1;width=512/https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2F2%2F22%2FBlowfishFFunction.svg%2F1200px-BlowfishFFunction.svg.png)
Code download available at: CNG 2007_07.exe(158 KB) Contents Algorithm Providers Random Number Generation Hash Functions Symmetric Encryption Asymmetric Encryption Signatures and Verification Interop with .NET Looking Forward Windows Vista™ introduces a new cryptography API to replace the old CryptoAPI, which has its roots in the early versions of Windows® NT and Windows 95. Cryptography Next Gene
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