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diff --git a/Crypto/src/crypto/parameters/NaccacheSternKeyGenerationParameters.cs b/Crypto/src/crypto/parameters/NaccacheSternKeyGenerationParameters.cs
new file mode 100644
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+++ b/Crypto/src/crypto/parameters/NaccacheSternKeyGenerationParameters.cs
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+using System;
+
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Security;
+
+namespace Org.BouncyCastle.Crypto.Parameters
+{
+ /**
+ * Parameters for NaccacheStern public private key generation. For details on
+ * this cipher, please see
+ *
+ * http://www.gemplus.com/smart/rd/publications/pdf/NS98pkcs.pdf
+ */
+ public class NaccacheSternKeyGenerationParameters : KeyGenerationParameters
+ {
+ // private BigInteger publicExponent;
+ private readonly int certainty;
+ private readonly int countSmallPrimes;
+ private bool debug;
+
+ /**
+ * Parameters for generating a NaccacheStern KeyPair.
+ *
+ * @param random
+ * The source of randomness
+ * @param strength
+ * The desired strength of the Key in Bits
+ * @param certainty
+ * the probability that the generated primes are not really prime
+ * as integer: 2^(-certainty) is then the probability
+ * @param countSmallPrimes
+ * How many small key factors are desired
+ */
+ public NaccacheSternKeyGenerationParameters(
+ SecureRandom random,
+ int strength,
+ int certainty,
+ int countSmallPrimes)
+ : this(random, strength, certainty, countSmallPrimes, false)
+ {
+ }
+
+ /**
+ * Parameters for a NaccacheStern KeyPair.
+ *
+ * @param random
+ * The source of randomness
+ * @param strength
+ * The desired strength of the Key in Bits
+ * @param certainty
+ * the probability that the generated primes are not really prime
+ * as integer: 2^(-certainty) is then the probability
+ * @param cntSmallPrimes
+ * How many small key factors are desired
+ * @param debug
+ * Turn debugging on or off (reveals secret information, use with
+ * caution)
+ */
+ public NaccacheSternKeyGenerationParameters(SecureRandom random,
+ int strength,
+ int certainty,
+ int countSmallPrimes,
+ bool debug)
+ : base(random, strength)
+ {
+ if (countSmallPrimes % 2 == 1)
+ {
+ throw new ArgumentException("countSmallPrimes must be a multiple of 2");
+ }
+ if (countSmallPrimes < 30)
+ {
+ throw new ArgumentException("countSmallPrimes must be >= 30 for security reasons");
+ }
+ this.certainty = certainty;
+ this.countSmallPrimes = countSmallPrimes;
+ this.debug = debug;
+ }
+
+ /**
+ * @return Returns the certainty.
+ */
+ public int Certainty
+ {
+ get { return certainty; }
+ }
+
+ /**
+ * @return Returns the countSmallPrimes.
+ */
+ public int CountSmallPrimes
+ {
+ get { return countSmallPrimes; }
+ }
+
+ public bool IsDebug
+ {
+ get { return debug; }
+ }
+ }
+}
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