diff --git a/src/ciphersuite.rs b/src/ciphersuite.rs
new file mode 100644
index 0000000..7ddfdb6
--- /dev/null
+++ b/src/ciphersuite.rs
@@ -0,0 +1,6 @@
+
+pub trait CipherSuite {
+    type Aead;
+    type Group;
+    type Keypair;
+}
diff --git a/src/lib.rs b/src/lib.rs
index d206248..38ae658 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -369,6 +369,7 @@ mod oprf;
 // do the oprf on
 mod group;
 pub mod slow_hash;
+pub mod ciphersuite;
 
 #[cfg(test)]
 mod tests;