pdf-tech-core/src/main/java/cn/kdan/pdf/tech/core/utils/KeyFileParseUtils.java

@@ -44,6 +44,9 @@ public class KeyFileParseUtils {
         String expireDate = properties.getProperty("ExpireDate");
         String users = properties.getProperty("Users");
         Sign sign = JsonUtils.jsonStringToBean(signJsonStr, Sign.class);
+        if (!Objects.deepEquals(ServerUtils.getDeviceId(),serverID)) {
+            throw new BackendRuntimeException("The key file signature is invalid.");
+        }
         if (!(Objects.deepEquals(sign.getServerID(),serverID)
                 && Objects.deepEquals(sign.getLicenseDate(),licenseDate)
                 && Objects.deepEquals(sign.getExpireDate(),expireDate)