diff --git a/backend/mpc-system/services/service-party-app/tss-party/main.go b/backend/mpc-system/services/service-party-app/tss-party/main.go
index cce842a7..18e20bd4 100644
--- a/backend/mpc-system/services/service-party-app/tss-party/main.go
+++ b/backend/mpc-system/services/service-party-app/tss-party/main.go
@@ -614,14 +614,20 @@ func executeSign(
 	fmt.Fprintf(os.Stderr, "[TSS-SIGN] Original keygenData has %d parties (Ks length)\n", len(keygenData.Ks))
 	fmt.Fprintf(os.Stderr, "[TSS-SIGN] Building subset for %d signing parties\n", len(sortedPartyIDs))
 
-	// Debug: print keygenData.Ks keys (first 8 chars of hex)
+	// Debug: print keygenData.Ks keys
 	for i, k := range keygenData.Ks {
-		fmt.Fprintf(os.Stderr, "[TSS-SIGN] keygenData.Ks[%d] = %s...\n", i, hex.EncodeToString(k.Bytes())[:16])
+		keyHex := hex.EncodeToString(k.Bytes())
+		fmt.Fprintf(os.Stderr, "[TSS-SIGN] keygenData.Ks[%d] = %s\n", i, keyHex)
 	}
 	// Debug: print sortedPartyIDs keys
 	for i, p := range sortedPartyIDs {
+		keyHex := hex.EncodeToString(p.Key)
+		idPrefix := p.Id
+		if len(idPrefix) > 8 {
+			idPrefix = idPrefix[:8]
+		}
 		fmt.Fprintf(os.Stderr, "[TSS-SIGN] sortedPartyIDs[%d]: Id=%s, Moniker=%s, Key=%s\n",
-			i, p.Id[:8], p.Moniker, hex.EncodeToString(p.Key))
+			i, idPrefix, p.Moniker, keyHex)
 	}
 
 	subsetKeygenData := keygen.BuildLocalSaveDataSubset(keygenData, sortedPartyIDs)