diff --git a/DysonNetwork.Sphere/ActivityPub/ActivityPubController.cs b/DysonNetwork.Sphere/ActivityPub/ActivityPubController.cs
index d3ce8ed..6fceb0a 100644
--- a/DysonNetwork.Sphere/ActivityPub/ActivityPubController.cs
+++ b/DysonNetwork.Sphere/ActivityPub/ActivityPubController.cs
@@ -317,7 +317,6 @@ public class ActivityPubController(
         SavePublisherKey(publisher, "private_key", newPrivate);
         SavePublisherKey(publisher, "public_key", newPublic);
         
-        publisher.UpdatedAt = SystemClock.Instance.GetCurrentInstant();
         db.Update(publisher);
         await db.SaveChangesAsync();
         
diff --git a/DysonNetwork.Sphere/ActivityPub/ActivityPubKeyService.cs b/DysonNetwork.Sphere/ActivityPub/ActivityPubKeyService.cs
index e841264..d37362d 100644
--- a/DysonNetwork.Sphere/ActivityPub/ActivityPubKeyService.cs
+++ b/DysonNetwork.Sphere/ActivityPub/ActivityPubKeyService.cs
@@ -21,7 +21,7 @@ public class ActivityPubKeyService(ILogger<ActivityPubKeyService> logger)
         return (privateKeyPem, publicKeyPem);
     }
 
-    public string Sign(string privateKeyPem, string dataToSign)
+    public static string Sign(string privateKeyPem, string dataToSign)
     {
         using var rsa = CreateRsaFromPrivateKeyPem(privateKeyPem);
         var signature = rsa.SignData(
diff --git a/DysonNetwork.Sphere/ActivityPub/ActivityPubSignatureService.cs b/DysonNetwork.Sphere/ActivityPub/ActivityPubSignatureService.cs
index 1c1010f..9bcfa19 100644
--- a/DysonNetwork.Sphere/ActivityPub/ActivityPubSignatureService.cs
+++ b/DysonNetwork.Sphere/ActivityPub/ActivityPubSignatureService.cs
@@ -107,7 +107,7 @@ public class ActivityPubSignatureService(
         
         logger.LogInformation("Signing string for outgoing request: {SigningString}", signingString);
         
-        var signature = keyService.Sign(keyPair.privateKeyPem, signingString);
+        var signature = ActivityPubKeyService.Sign(keyPair.privateKeyPem, signingString);
         
         logger.LogInformation("Generated signature: {Signature}", signature.Substring(0, Math.Min(50, signature.Length)) + "...");
         
diff --git a/DysonNetwork.sln.DotSettings.user b/DysonNetwork.sln.DotSettings.user
index 05654e4..e609556 100644
--- a/DysonNetwork.sln.DotSettings.user
+++ b/DysonNetwork.sln.DotSettings.user
@@ -152,6 +152,7 @@
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AReverseProxyIEndpointRouteBuilderExtensions_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2025_002E2_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003Fbf3f51607a3e4e76b5b91640cd7409195c430_003Fa1_003F34726adb_003FReverseProxyIEndpointRouteBuilderExtensions_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AReverseProxyServiceCollectionExtensions_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2025_002E1_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003Fbf3f51607a3e4e76b5b91640cd7409195c430_003F13_003F8595a157_003FReverseProxyServiceCollectionExtensions_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ARouteConfig_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2025_002E1_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003Fbf3f51607a3e4e76b5b91640cd7409195c430_003F84_003F98414804_003FRouteConfig_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ARSASignaturePadding_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2025_002E3_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003Fe354d3d2913748efac052b30ec6037c4257108_003Fcf_003F5663019b_003FRSASignaturePadding_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ARSA_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2025_002E1_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003Fee4f989f6b8042b59b2654fdc188e287243600_003F8b_003F44e5f855_003FRSA_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ASafeHandle_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2025_002E1_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003Fb6f0571a6bc744b0b551fd4578292582e54c00_003F66_003Fde27c365_003FSafeHandle_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ASecuritySchemeType_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2024_002E3_003Fresharper_002Dhost_003FSourcesCache_003F29898ce74e3763a786ac1bd9a6db2152e1af75769440b1e53b9cbdf1dda1bd99_003FSecuritySchemeType_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>