diff --git a/scripts/mbedtls_dev/crypto_knowledge.py b/scripts/mbedtls_dev/crypto_knowledge.py
index a551c6d..f93ca55 100644
--- a/scripts/mbedtls_dev/crypto_knowledge.py
+++ b/scripts/mbedtls_dev/crypto_knowledge.py
@@ -104,6 +104,10 @@
         `self.name`.
         """
 
+    def is_public(self) -> bool:
+        """Whether the key type is for public keys."""
+        return self.name.endswith('_PUBLIC_KEY')
+
     ECC_KEY_SIZES = {
         'PSA_ECC_FAMILY_SECP_K1': (192, 224, 256),
         'PSA_ECC_FAMILY_SECP_R1': (225, 256, 384, 521),
@@ -240,8 +244,17 @@
     PAKE = 10
 
     def requires_key(self) -> bool:
+        """Whether operations in this category are set up with a key."""
         return self not in {self.HASH, self.KEY_DERIVATION}
 
+    def is_asymmetric(self) -> bool:
+        """Whether operations in this category involve asymmetric keys."""
+        return self in {
+            self.SIGN,
+            self.ASYMMETRIC_ENCRYPTION,
+            self.KEY_AGREEMENT
+        }
+
 
 class AlgorithmNotRecognized(Exception):
     def __init__(self, expr: str) -> None: