diff --git a/include/sxt/sxtkey.h b/include/sxt/sxtkey.h
index ee35a88..1170c81 100644
--- a/include/sxt/sxtkey.h
+++ b/include/sxt/sxtkey.h
@@ -40,6 +40,12 @@ typedef uint8_t ed25519_signature[ED25519_SIG_LEN];
 #define SXT_PPKP_PRIVATE  (1 << 2)
 #define SXT_PPKP_PUBLIC   (1 << 1)
 
+#define SXT_PPKP_IHASH    (1 << 1)
+#define SXT_PPKP_ENCRYPT  (1 << 2)
+
+/* magic values */
+#define PPKP_MAGIC  "0xbeef0101"
+
 /* here the supported types in SXT */
 #define PPKP_ED25519  0xa