diff --git a/include/codecrypt.h b/include/codecrypt.h
index 3917163..d3ef381 100644
--- a/include/codecrypt.h
+++ b/include/codecrypt.h
@@ -86,6 +86,7 @@ public:
 	matrix sqInv; //"cache"
 
 	int decrypt (const bvector&, bvector&);
+	int sign (const bvector&, bvector&, uint, prng&);
 };
 
 class pubkey
@@ -94,6 +95,7 @@ public:
 	matrix G;
 	uint t;
 	int encrypt (const bvector&, bvector&, prng&);
+	int verify (const bvector&, const bvector&, uint);
 };
 
 int generate (pubkey&, privkey&, prng&);
@@ -107,9 +109,10 @@ namespace nd
 class privkey
 {
 public:
-	/*todo stuff*/
+	// TODO
 
 	int decrypt (const bvector&, bvector&);
+	int sign (const bvector&hash, bvector&sig, uint, prng&);
 };
 
 class pubkey
@@ -119,6 +122,7 @@ public:
 	uint t;
 
 	int encrypt (const bvector&, bvector&, prng&);
+	int verify (const bvector&sig, const bvector&hash, uint);
 };
 
 int generate (pubkey&, privkey&, prng&);
diff --git a/lib/mce.cpp b/lib/mce.cpp
new file mode 100644
index 0000000..747cc87
--- /dev/null
+++ b/lib/mce.cpp
@@ -0,0 +1,30 @@
+
+#include "codecrypt.h"
+
+using namespace ccr;
+using namespace ccr::mce;
+
+int generate (pubkey&pub, privkey&priv, prng&rng)
+{
+
+}
+
+int pubkey::encrypt (const bvector& in, bvector&out, prng&rng)
+{
+
+}
+
+int privkey::decrypt (const bvector&in, bvector&out)
+{
+
+}
+
+int privkey::sign (const bvector&in, bvector&out, uint min_delta, prng&rng)
+{
+
+}
+
+int pubkey::verify (const bvector&in, const bvector&hash, uint missing)
+{
+
+}
diff --git a/lib/nd.cpp b/lib/nd.cpp
new file mode 100644
index 0000000..d264abc
--- /dev/null
+++ b/lib/nd.cpp
@@ -0,0 +1,30 @@
+
+#include "codecrypt.h"
+
+using namespace ccr;
+using namespace ccr::nd;
+
+int generate (pubkey&pub, privkey&priv, prng&rng)
+{
+
+}
+
+int pubkey::encrypt (const bvector& in, bvector&out, prng&rng)
+{
+
+}
+
+int privkey::decrypt (const bvector&in, bvector&out)
+{
+
+}
+
+int privkey::sign (const bvector&in, bvector&out, uint min_delta, prng&rng)
+{
+
+}
+
+int pubkey::verify (const bvector&in, const bvector&hash, uint missing)
+{
+
+}