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diff --git a/CryptoPP/sosemanuk.h b/CryptoPP/sosemanuk.h
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+++ b/CryptoPP/sosemanuk.h
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+#ifndef CRYPTOPP_SOSEMANUK_H
+#define CRYPTOPP_SOSEMANUK_H
+
+#include "strciphr.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! algorithm info
+struct SosemanukInfo : public VariableKeyLength<16, 1, 32, 1, SimpleKeyingInterface::UNIQUE_IV, 16>
+{
+	static const char * StaticAlgorithmName() {return "Sosemanuk";}
+};
+
+//! _
+class SosemanukPolicy : public AdditiveCipherConcretePolicy<word32, 20>, public SosemanukInfo
+{
+protected:
+	void CipherSetKey(const NameValuePairs &params, const byte *key, size_t length);
+	void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount);
+	void CipherResynchronize(byte *keystreamBuffer, const byte *iv, size_t length);
+	bool CipherIsRandomAccess() const {return false;}
+#if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X64
+	unsigned int GetAlignment() const;
+	unsigned int GetOptimalBlockSize() const;
+#endif
+
+	FixedSizeSecBlock<word32, 25*4> m_key;
+	FixedSizeAlignedSecBlock<word32, 12> m_state;
+};
+
+//! <a href="http://www.cryptolounge.org/wiki/Sosemanuk">Sosemanuk</a>
+struct Sosemanuk : public SosemanukInfo, public SymmetricCipherDocumentation
+{
+	typedef SymmetricCipherFinal<ConcretePolicyHolder<SosemanukPolicy, AdditiveCipherTemplate<> >, SosemanukInfo> Encryption;
+	typedef Encryption Decryption;
+};
+
+NAMESPACE_END
+
+#endif