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diff --git a/Source/charon/threads/prime_pool.h b/Source/charon/threads/prime_pool.h
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+/**
+ * @file prime_pool.h
+ *
+ * @brief Interface of prime_pool_t.
+ *
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef PRIME_POOL_H_
+#define PRIME_POOL_H_
+
+#include <gmp.h>
+
+#include <types.h>
+#include <network/packet.h>
+
+
+typedef struct prime_pool_t prime_pool_t;
+
+/**
+ * @brief Prime generation
+ * 
+ * Starts a low-priority thread which will
+ * generate generate primes in the background.
+ * This increases responsibility, since prime generation
+ * is the most time-comsuming task.
+ * 
+ * @ingroup threads
+ */
+struct prime_pool_t {
+
+	/**
+	 * @brief Get the number of available primes for the given prime size.
+	 *
+	 * @param prime_pool_t 	calling object
+ 	 * @param 				size of the prime
+	 * @returns 			number of primes
+	 */
+	int (*get_count) (prime_pool_t *prime_pool, size_t prime_size);
+
+	/**
+	 * @brief Get a prime for the given size.
+	 *
+	 * If no primes are available, the threads generates one of its own.
+	 * Prime is allocated and must be freed by caller.
+	 *
+	 * @param prime_pool_t 	calling object
+	 * @return 				chunk containing the prime
+	 */
+	void (*get_prime) (prime_pool_t *prime_pool, size_t prime_size, mpz_t *prime);
+
+	/**
+	 * @brief destroys a prime_pool object.
+	 *
+	 * Stopps the prime thread and destroys the pool.
+	 *
+	 * @param prime_pool_t 	calling object
+	 */
+	void (*destroy) (prime_pool_t *prime_pool);
+};
+
+/**
+ * @brief Creates a prime pool with a thread in it.
+ *
+ * @return prime_pool_t the prime_pool
+ * 
+ * @ingroup threads
+ */
+prime_pool_t *prime_pool_create(int generation_limit);
+
+#endif /*PRIME_POOL_H_*/