diff --git a/v6d0auth/certs.py b/v6d0auth/certs.py
index 082e0eb..4f5f36c 100644
--- a/v6d0auth/certs.py
+++ b/v6d0auth/certs.py
@@ -5,7 +5,7 @@ from nacl.signing import SigningKey, VerifyKey, SignedMessage
 
 from v6d0auth.config import myroot, cakey
 
-__all__ = ('vkey', 'pkey', 'averify')
+__all__ = ('vkey', 'pkey', 'averify', 'receive')
 
 _keyfile = myroot / '.key'
 if _keyfile.exists():
@@ -27,6 +27,10 @@ def verify(data: bytes, signature: Optional[bytes] = None) -> bytes:
     return vkey.verify(data, signature)
 
 
+def encrypt_self(data: bytes) -> bytes:
+    return SealedBox(pkey).encrypt(data)
+
+
 def receive(data: bytes) -> bytes:
     return SealedBox(_ekey).decrypt(data)