diff --git a/tests/doublekeyTest.cs b/tests/doublekeyTest.cs
new file mode 100644
index 0000000..62e5f77
--- /dev/null
+++ b/tests/doublekeyTest.cs
@@ -0,0 +1,44 @@
+using NUnit.Framework;
+using chestcrypto;
+using System;
+using Sodium;
+
+namespace DoubleKeyTests
+{
+    public class Tests
+    {
+        [SetUp]
+        public void Setup()
+        {
+        }
+
+        [Test]
+        public void TestDoublePublicKey()
+        {
+            // Test that the combined key loader loads both constructors with the same results
+            byte[] signingKey = PublicKeyAuth.GenerateKeyPair().PublicKey;
+            byte[] encryptionKey = PublicKeyBox.GenerateKeyPair().PublicKey;
+
+            byte[] combinedKey = new byte[signingKey.Length + encryptionKey.Length];
+            Buffer.BlockCopy(signingKey, 0, combinedKey, 0, signingKey.Length);
+            Buffer.BlockCopy(encryptionKey, 0, combinedKey, signingKey.Length, encryptionKey.Length);
+
+            DoublePublicKey combinedLoad = new chestcrypto.DoublePublicKey(combinedKey);
+            DoublePublicKey parameterLoad = new chestcrypto.DoublePublicKey(signingKey, encryptionKey);
+            if (combinedLoad.getRawDouble().Length != parameterLoad.getRawDouble().Length){
+                Assert.Fail();
+            }
+            if (combinedLoad.getRawDouble().Length != 64){
+                Assert.Fail();
+            }
+            for (int i = 0; i < combinedLoad.getRawDouble().Length; i++){
+                if (combinedLoad.getRawDouble()[i] != parameterLoad.getRawDouble()[i]){
+                    Assert.Fail();
+                }
+                if (combinedLoad.getRawDouble()[i] != combinedKey[i]){
+                    Assert.Fail();
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/treasurechest/chestcrypto/doublekey/exceptions.cs b/treasurechest/chestcrypto/doublekey/exceptions.cs
new file mode 100644
index 0000000..40a6e44
--- /dev/null
+++ b/treasurechest/chestcrypto/doublekey/exceptions.cs
@@ -0,0 +1,22 @@
+using System;
+
+namespace chestcrypto {
+
+    public class InvalidDoubleKeyException : Exception
+    {
+        public InvalidDoubleKeyException()
+        {
+        }
+
+        public InvalidDoubleKeyException(string message)
+            : base(message)
+        {
+        }
+
+        public InvalidDoubleKeyException(string message, Exception inner)
+            : base(message, inner)
+        {
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/treasurechest/chestcrypto/doublekey/private.cs b/treasurechest/chestcrypto/doublekey/private.cs
new file mode 100644
index 0000000..b964ad3
--- /dev/null
+++ b/treasurechest/chestcrypto/doublekey/private.cs
@@ -0,0 +1,16 @@
+namespace chestcrypto{
+
+    public class DoublePrivateKey{
+
+        private byte[] signingprivateKey;
+        public byte[] encryptprivateKey;
+
+
+        public DoublePrivateKey(byte[] sign, byte[] encrypt){
+            signingprivateKey = sign;
+            encryptprivateKey = encrypt;
+        }
+
+    }
+
+}
\ No newline at end of file
diff --git a/treasurechest/chestcrypto/doublekey/public.cs b/treasurechest/chestcrypto/doublekey/public.cs
new file mode 100644
index 0000000..97b6a42
--- /dev/null
+++ b/treasurechest/chestcrypto/doublekey/public.cs
@@ -0,0 +1,36 @@
+namespace chestcrypto{
+
+    public class DoublePublicKey{
+
+        private byte[] signingPublicKey = new byte[32];
+        private byte[] encryptPublicKey = new byte[32];
+
+        private string[] signingPublicKeyString;
+        private string[] encryptPublicKeyString;
+
+        public byte[] getRawDouble(){
+            return ByteCombiner.Combine(signingPublicKey, encryptPublicKey);
+        }
+
+
+        public DoublePublicKey(byte[] sign, byte[] encrypt){
+            signingPublicKey = sign;
+            encryptPublicKey = encrypt;
+        }
+
+        public DoublePublicKey(byte[] joinedKey){
+            if (joinedKey.Length != 64){
+                throw new InvalidDoubleKeyException();
+            }
+            for (int i = 0; i < joinedKey.Length; i++){
+                if (i < 32){
+                    this.signingPublicKey[i] = joinedKey[i];
+                    continue;
+                }
+                this.encryptPublicKey[i - 32] = joinedKey[i];
+            }
+        }
+
+    }
+
+}
\ No newline at end of file
diff --git a/treasurechest/chestcrypto/keygen.cs b/treasurechest/chestcrypto/keygen.cs
index 5c644dc..041d835 100644
--- a/treasurechest/chestcrypto/keygen.cs
+++ b/treasurechest/chestcrypto/keygen.cs
@@ -1,5 +1,4 @@
 using Sodium;
-using System.Security.Cryptography;
 using System;
 
 
diff --git a/treasurechest/keyring/keyring.cs b/treasurechest/keyring/keyring.cs
new file mode 100644
index 0000000..7c7f1d4
--- /dev/null
+++ b/treasurechest/keyring/keyring.cs
@@ -0,0 +1,21 @@
+using chestcrypto;
+
+namespace keyring{
+
+    public class KeyRing
+    {
+        private string storageFile = null;
+        public KeyRing(string storageFile){
+
+        }
+
+        public void addPublicKey(DoublePublicKey key){
+
+        }
+
+        public void deleteKey(DoublePrivateKey key){
+
+        }
+    }
+
+}
\ No newline at end of file