How To Fix 1S527 - Incorrect signature or encryption

SAP Error Message - Details

• Message type: E = Error

• Message class: 1S - Messages for SSF ("Secure Store & Forward")

• Message number: 527

• Message text: Incorrect signature or encryption

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message 1S527 - Incorrect signature or encryption ?

  The SAP error message 1S527: Incorrect signature or encryption typically indicates an issue with the digital signature or encryption of data being processed in the SAP system. This error can occur in various contexts, such as during the processing of electronic documents, secure communications, or when using certain SAP modules that require secure data handling.
  Causes:
  
  Mismatched Keys: The encryption or signature keys used to sign or encrypt the data do not match the expected keys on the receiving end.
  Corrupted Data: The data being transmitted may have been altered or corrupted during transmission, leading to signature verification failures.
  Configuration Issues: Incorrect configuration of the cryptographic settings in the SAP system can lead to this error.
  Expired Certificates: If digital certificates used for signing or encryption have expired, this can result in signature verification failures.
  Software Bugs: Occasionally, bugs in the SAP software or the underlying libraries used for cryptography can lead to this error.
  
  Solutions:
  
  
  Check Keys and Certificates:
  
  Ensure that the correct encryption and signing keys are being used.
  Verify that the certificates are valid and not expired.
  
  
  
  Review Configuration:
  
  Check the configuration settings related to cryptography in the SAP system. This includes settings in transaction codes like STRUST (for SSL and PSE) and others related to secure communication.
  
  
  
  Data Integrity:
  
  Ensure that the data being sent or received has not been altered. You may need to re-generate the data or re-send it.
  
  
  
  Update Software:
  
  Ensure that your SAP system is up to date with the latest patches and updates, as these may contain fixes for known issues related to encryption and signatures.
  
  
  
  Consult Logs:
  
  Review the application logs (transaction SLG1) for more detailed error messages that can provide additional context about the failure.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. They may provide specific guidance based on the version of SAP you are using and the context in which the error occurs.
  
  
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may address this specific error or provide guidance on configuration and troubleshooting.
  Documentation: Review SAP documentation related to secure communications, digital signatures, and encryption to ensure compliance with best practices.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and resolve the 1S527 Incorrect signature or encryption error in your SAP system.