diff --git a/swift-secure-enclave-tool-v2.swift b/swift-secure-enclave-tool-v2.swift
index 238faf7..3f39653 100644
--- a/swift-secure-enclave-tool-v2.swift
+++ b/swift-secure-enclave-tool-v2.swift
@@ -244,7 +244,7 @@ struct ComputeSecureEnclaveP256EcsignResponse: Codable {
 
 struct ComputeSecureEnclaveP256EcdhResponse: Codable {
     var success: Bool
-    var shared_secret: String
+    var shared_secret_hex: String
 }
 
 struct ExternalSpecResponse: Codable {
@@ -437,9 +437,18 @@ func computeSecureEnclaveP256Ecdh(request: ComputeP256EcdhRequest) -> ComputeSec
         let sharedSecret = try p.sharedSecretFromKeyAgreement(
             with: ephemeralPublicKey)
 
+        var shared_secret_hex: String
+        if sharedSecret.description.starts(with: "SharedSecret: ") {
+            let str = sharedSecret.description
+            let startIndex = str.index(str.startIndex, offsetBy: "SharedSecret: ".count)
+            shared_secret_hex = String(str[startIndex...])
+        } else {
+            shared_secret_hex = sharedSecret.description
+        }
+
         return ComputeSecureEnclaveP256EcdhResponse(
             success: true,
-            shared_secret: sharedSecret.description
+            shared_secret_hex: shared_secret_hex
         )
     } catch {
         exitError("\(error)")