How To Fix TRUST168 - Algorithm &1 &2 &3 is forbidden for this application

SAP Error Message - Details

• Message type: E = Error

• Message class: TRUST - Certificate Management

• Message number: 168

• Message text: Algorithm &1 &2 &3 is forbidden for this application

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message TRUST168 - Algorithm &1 &2 &3 is forbidden for this application ?

  The SAP error message TRUST168 indicates that a specific cryptographic algorithm is not allowed for the application you are working with. This typically occurs in the context of digital signatures, encryption, or secure communications where certain algorithms may be restricted due to security policies or compliance requirements.
  Cause:
  The error is caused by the use of a cryptographic algorithm that is either deprecated, not supported, or explicitly forbidden in the configuration of the SAP system. This can happen due to:
  
  Security Policies: The system may have security policies that restrict the use of certain algorithms to prevent vulnerabilities.
  Configuration Settings: The algorithm may not be enabled in the system's configuration settings.
  Compatibility Issues: The application may not support the algorithm due to compatibility issues with other components or systems.
  
  Solution:
  To resolve the TRUST168 error, you can take the following steps:
  
  
  Check the Algorithm: Identify the algorithm that is causing the issue (the placeholders &1, &2, &3 in the error message will be replaced with the specific algorithm details).
  
  
  Review Security Policies: Consult your organization's security policies to determine if the algorithm is indeed forbidden. If it is, you may need to switch to a different, allowed algorithm.
  
  
  Update Configuration:
  
  Go to transaction STRUST in SAP.
  Check the SSL settings and the cryptographic algorithms configured for your application.
  If necessary, update the configuration to allow the required algorithm, if it is deemed secure and compliant.
  
  
  
  Use Supported Algorithms: If the algorithm is not allowed, consider using a different algorithm that is supported and meets your security requirements. Commonly supported algorithms include RSA, AES, and SHA-256.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to cryptographic algorithms and security settings for your specific version of SAP.
  
  
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance, especially if this is a production environment.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional context or solutions for this error.
  Security Guidelines: Familiarize yourself with SAP's security guidelines regarding cryptographic algorithms and their usage.
  System Updates: Ensure that your SAP system is up to date, as newer versions may have improved support for cryptographic algorithms.
  
  By following these steps, you should be able to address the TRUST168 error and ensure that your application is using compliant and secure cryptographic algorithms.