diff --git a/Crypto/src/crypto/parameters/ECDomainParameters.cs b/Crypto/src/crypto/parameters/ECDomainParameters.cs
new file mode 100644
index 000000000..c6a3e4e72
--- /dev/null
+++ b/Crypto/src/crypto/parameters/ECDomainParameters.cs
@@ -0,0 +1,116 @@
+using System;
+
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Math.EC;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Crypto.Parameters
+{
+ public class ECDomainParameters
+ {
+ internal ECCurve curve;
+ internal byte[] seed;
+ internal ECPoint g;
+ internal BigInteger n;
+ internal BigInteger h;
+
+ public ECDomainParameters(
+ ECCurve curve,
+ ECPoint g,
+ BigInteger n)
+ : this(curve, g, n, BigInteger.One)
+ {
+ }
+
+ public ECDomainParameters(
+ ECCurve curve,
+ ECPoint g,
+ BigInteger n,
+ BigInteger h)
+ : this(curve, g, n, h, null)
+ {
+ }
+
+ public ECDomainParameters(
+ ECCurve curve,
+ ECPoint g,
+ BigInteger n,
+ BigInteger h,
+ byte[] seed)
+ {
+ if (curve == null)
+ throw new ArgumentNullException("curve");
+ if (g == null)
+ throw new ArgumentNullException("g");
+ if (n == null)
+ throw new ArgumentNullException("n");
+ if (h == null)
+ throw new ArgumentNullException("h");
+
+ this.curve = curve;
+ this.g = g;
+ this.n = n;
+ this.h = h;
+ this.seed = Arrays.Clone(seed);
+ }
+
+ public ECCurve Curve
+ {
+ get { return curve; }
+ }
+
+ public ECPoint G
+ {
+ get { return g; }
+ }
+
+ public BigInteger N
+ {
+ get { return n; }
+ }
+
+ public BigInteger H
+ {
+ get { return h; }
+ }
+
+ public byte[] GetSeed()
+ {
+ return Arrays.Clone(seed);
+ }
+
+ public override bool Equals(
+ object obj)
+ {
+ if (obj == this)
+ return true;
+
+ ECDomainParameters other = obj as ECDomainParameters;
+
+ if (other == null)
+ return false;
+
+ return Equals(other);
+ }
+
+ protected bool Equals(
+ ECDomainParameters other)
+ {
+ return curve.Equals(other.curve)
+ && g.Equals(other.g)
+ && n.Equals(other.n)
+ && h.Equals(other.h)
+ && Arrays.AreEqual(seed, other.seed);
+ }
+
+ public override int GetHashCode()
+ {
+ return curve.GetHashCode()
+ ^ g.GetHashCode()
+ ^ n.GetHashCode()
+ ^ h.GetHashCode()
+ ^ Arrays.GetHashCode(seed);
+ }
+ }
+
+}
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