diff --git a/swift-secure-enclave-tool.swift b/swift-secure-enclave-tool.swift
index 697083e..216a2fa 100644
--- a/swift-secure-enclave-tool.swift
+++ b/swift-secure-enclave-tool.swift
@@ -31,18 +31,18 @@ func generateSecureEnclaveP256KeyPair(sign: Bool, requireBio: Bool) -> String {
             let privateKeyReference = try SecureEnclave.P256.Signing.PrivateKey.init(
                accessControl: accessCtrl
             )
-            let publicKeyBase64 = privateKeyReference.publicKey.x963Representation.base64EncodedString()
-            let publicKeyPem = privateKeyReference.publicKey.derRepresentation.base64EncodedString()
+            let publicKeyPointBase64 = privateKeyReference.publicKey.x963Representation.base64EncodedString()
+            let publicKeyDerBase64 = privateKeyReference.publicKey.derRepresentation.base64EncodedString()
             let dataRepresentationBase64 = privateKeyReference.dataRepresentation.base64EncodedString()
-            return "ok:\(publicKeyBase64),\(publicKeyPem),\(dataRepresentationBase64)"
+            return "ok:\(publicKeyPointBase64),\(publicKeyDerBase64),\(dataRepresentationBase64)"
         } else {
             let privateKeyReference = try SecureEnclave.P256.KeyAgreement.PrivateKey.init(
                accessControl: accessCtrl
             )
-            let publicKeyBase64 = privateKeyReference.publicKey.x963Representation.base64EncodedString()
-            let publicKeyPem = privateKeyReference.publicKey.derRepresentation.base64EncodedString()
+            let publicKeyPointBase64 = privateKeyReference.publicKey.x963Representation.base64EncodedString()
+            let publicKeyDerBase64 = privateKeyReference.publicKey.derRepresentation.base64EncodedString()
             let dataRepresentationBase64 = privateKeyReference.dataRepresentation.base64EncodedString()
-            return "ok:\(publicKeyBase64),\(publicKeyPem),\(dataRepresentationBase64)"
+            return "ok:\(publicKeyPointBase64),\(publicKeyDerBase64),\(dataRepresentationBase64)"
         }
     } catch {
         return "err:\(error)"
@@ -226,4 +226,27 @@ if (command == "version") {
     exitWith("ok:1.0.0-20250118")
 }
 
+if (command == "help") {
+    print("swift-secure-enclave-tool <command>")
+    print("help                                                              - print help")
+    print("version                                                           - print version")
+    print("is_support_secure_enclave                                         - print is support Secure Enclave")
+    print("generate_secure_enclave_p256_ecsign_keypair [requireBio]          - generate Secure Enclave P256 EC sign key pair")
+    print("generate_secure_enclave_p256_ecdh_keypair [requireBio]            - generate Secure Enclave P256 EC DH key pair")
+    print("recover_secure_enclave_p256_ecsign_public_key <privateKey>        - recover Secure Enclave P256 EC sign key pair")
+    print("recover_secure_enclave_p256_ecdh_public_key <privateKey>          - recover Secure Enclave P256 EC DH key pair")
+    print("compute_secure_enclave_p256_ecsign <privateKey> <content>         - compure Secure Enclave P256 EC sign")
+    print("compute_secure_enclave_p256_ecdh <privateKey> <ephemeraPublicKey> - compure Secure Enclave P256 EC DH")
+    print()
+    print("options:")
+    print("> requireBio               - true or false (default true)")
+    print("> privateKey               - private key representation (dataRepresentationBase64)")
+    print("> content                  - content in base64")
+    print("> ephemeraPublicKey        - public key der in base64")
+    print()
+    print("generate secure enclave key pair format:")
+    print("> ok:publicKeyPointBase64,publicKeyDerBase64,dataRepresentationBase64")
+    exit(0)
+}
+
 exitWith("err:invalid command")