← Back to Knowledge Base

KB #240018: Cyclic Redundancy Check Error (CRC) When Starting Application Using DE/NEP

⏱️ 2 min read
Type: Information
Summary:
What the CRC error means and how to fix it
Additional Information:
This applies only to applications that have been “Secured” with Encryptionizer via GUI, CLI or the associated API. If you are using the APIs only, it is unlikely that the problem is related to Encryptionizer. When you have secured your application with GUI or CLI, Encryptionizer ahs an option to generate a complex CRC to ensure that no one has replaced or modified the application’s executable. In fact, Encryptionizer acts as an additional anti-virus check on the executable. It could be modified/replaced

  • By accident (e.g., accidentally restoring an old version)
  • Deliberately but proper (e.g., a service pack or patch has been applied)
  • Deliberately but malicious (e.g., infected with a virus)

If the executable has been changed, the next time you go to start the application, Encryptionizer will generate the CRC error. What to do next depends on the cause of the message.

  • If replaced/modified by accident, restore or reinstall the correct executable.
  • If deliberate but proper, re-secure the application after all the patches and updates have been applied.
  • If deliberate but malicious, run a virus scan and then restore or reinstall the original.

By default, Encryptionizer will not check the CRC, however for custom modules, we recommend that you use this option.

Developer Note: If distributing a new version of your application, make sure to also distribute or generate a new SEC profile.

 

Was this article helpful?

Related Articles

KB #240124: Using Encryptionizer for SQL on a Cluster

Type: Information Summary: Encryptionizer for SQL is cluster safe, but the installation and configuration are…

KB #240020: APIs returning empty or invalid values when encrypting or decrypting (SQL Server)

Type: Information Summary: This article discusses why you may see the APIs returning empty or…

KB #240102: Encrypted Databases not accessible (Recovery Pending, Suspect)

Type: Information Summary: Your encrypted SQL databases are not accessible after you have started SQL…

Still need help?

Our support team is here to assist you.

NetLib Security
AI Assistant · Online
Hi! I'm the NetLib Security assistant. I can answer questions about our encryption solutions, HIPAA compliance, Encryptionizer, and more. How can I help you today?