diff --git a/crates/crypto/src/key/key.rs b/crates/crypto/src/key/key.rs
index 66ada448..ec3d84d0 100644
--- a/crates/crypto/src/key/key.rs
+++ b/crates/crypto/src/key/key.rs
@@ -2,6 +2,13 @@ use ssi_jwk::JWK;
 use ssi_jws::Error as JWSError;
 
 /// Enum defining all supported cryptographic key types.
+///
+/// Note that KeyType is NOT to be interpreted as the "kty" header defined in https://www.rfc-editor.org/rfc/rfc7517#section-4.1.
+/// Instead, "kty" (the JOSE header) should be thought of as the type for a Json Web Key (JWK)
+/// object. This enum should be thought of as the type of a cryptographic key.
+/// KeyType maps to a JWK type, but not the other way around. For example, the KeyType of "Ed25519"
+/// maps to the JWK type (i.e. the "kty" header) of "EC". The converse is not true. "EC" maps to
+/// many KeyType enums.
 pub enum KeyType {
     Secp256k1,
     Secp256r1,