diff --git a/src/WalletFramework.Core/Base64Url/Base64UrlString.cs b/src/WalletFramework.Core/Base64Url/Base64UrlString.cs
index 71e74b6..1d288cd 100644
--- a/src/WalletFramework.Core/Base64Url/Base64UrlString.cs
+++ b/src/WalletFramework.Core/Base64Url/Base64UrlString.cs
@@ -6,6 +6,8 @@ public readonly struct Base64UrlString
 {
     private string Value { get; }
 
+    public byte[] AsByteArray => Base64UrlEncoder.DecodeBytes(Value);
+
     private Base64UrlString(string value)
     {
         Value = value;
diff --git a/src/WalletFramework.Core/Cryptography/Models/PublicKey.cs b/src/WalletFramework.Core/Cryptography/Models/PublicKey.cs
index 17c5f92..d0a5415 100644
--- a/src/WalletFramework.Core/Cryptography/Models/PublicKey.cs
+++ b/src/WalletFramework.Core/Cryptography/Models/PublicKey.cs
@@ -11,7 +11,7 @@ public record PublicKey(Base64UrlString X, Base64UrlString Y)
 
 public static class PublicKeyFun
 {
-    public static object ToJwkObj(this PublicKey publicKey) => new
+    public static object ToObj(this PublicKey publicKey) => new
     {
         kty = publicKey.KeyType,
         crv = publicKey.Curve,
diff --git a/src/WalletFramework.Oid4Vc/Oid4Vci/Authorization/DPop/Implementations/DPopHttpClient.cs b/src/WalletFramework.Oid4Vc/Oid4Vci/Authorization/DPop/Implementations/DPopHttpClient.cs
index 5961a37..16dff85 100644
--- a/src/WalletFramework.Oid4Vc/Oid4Vci/Authorization/DPop/Implementations/DPopHttpClient.cs
+++ b/src/WalletFramework.Oid4Vc/Oid4Vci/Authorization/DPop/Implementations/DPopHttpClient.cs
@@ -129,7 +129,7 @@ private async Task<string> GenerateDPopHeaderAsync(KeyId keyId, string audience,
         };
             
         var publicKey = await _keyStore.GetPublicKey(keyId);
-        header["jwk"] = publicKey.ToJwkObj();
+        header["jwk"] = publicKey.ToObj();
 
         string? ath = null;
         if (!string.IsNullOrEmpty(accessToken))
diff --git a/src/WalletFramework.SdJwtVc/Services/SdJwtVcHolderService/SdJwtSigner.cs b/src/WalletFramework.SdJwtVc/Services/SdJwtVcHolderService/SdJwtSigner.cs
index 724acf4..37ba33f 100644
--- a/src/WalletFramework.SdJwtVc/Services/SdJwtVcHolderService/SdJwtSigner.cs
+++ b/src/WalletFramework.SdJwtVc/Services/SdJwtVcHolderService/SdJwtSigner.cs
@@ -24,7 +24,7 @@ public async Task<string> GenerateKbProofOfPossessionAsync(KeyId keyId, string a
         if (string.Equals(type, "openid4vci-proof+jwt", StringComparison.OrdinalIgnoreCase))
         {
             var publicKey = await _keyStore.GetPublicKey(keyId);
-            header["jwk"] = publicKey.ToJwkObj();
+            header["jwk"] = publicKey.ToObj();
         }
 
         var payload = new Dictionary<string, object>