How To Fix SECAUDIT157 - HMAC key with ident &1 was deleted

SAP Error Message - Details

• Message type: E = Error

• Message class: SECAUDIT - Message class for security audit

• Message number: 157

• Message text: HMAC key with ident &1 was deleted

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SECAUDIT157 - HMAC key with ident &1 was deleted ?

  The SAP error message SECAUDIT157 indicates that an HMAC (Hash-based Message Authentication Code) key associated with a specific identifier (denoted as &1) has been deleted. This message is part of the security audit log in SAP systems, which tracks changes and events related to security.
  Cause:
  
  Key Deletion: The HMAC key was intentionally deleted by a user or through a system process. This could happen during key management activities, such as key rotation or cleanup.
  Configuration Changes: Changes in the system configuration or security policies may lead to the deletion of keys.
  System Maintenance: During system maintenance or upgrades, keys may be removed if they are no longer deemed necessary or if they are replaced with new keys.
  
  Solution:
  
  Recreate the HMAC Key: If the key is required for authentication or data integrity, you may need to recreate the HMAC key. This can typically be done through the SAP transaction code for key management (e.g., STRUST for SSL/TLS keys).
  Check Audit Logs: Review the security audit logs to determine who deleted the key and why. This can help in understanding if the deletion was intentional or accidental.
  Restore from Backup: If the key is critical and cannot be recreated, consider restoring it from a backup if available.
  Review Security Policies: Ensure that your security policies and procedures for key management are up to date to prevent unauthorized deletions in the future.
  User Training: If the deletion was accidental, consider providing training to users on the importance of HMAC keys and how to manage them properly.
  
  Related Information:
  
  HMAC Keys: HMAC keys are used in various security protocols to ensure data integrity and authenticity. They are crucial for secure communications and data exchanges.
  SAP Security Audit Log: The security audit log in SAP records security-related events, including key management activities. It is important for compliance and monitoring purposes.
  Key Management Best Practices: Implement best practices for key management, including regular audits, key rotation policies, and access controls to minimize the risk of unauthorized key deletions.
  
  If you continue to experience issues or if the key is critical for your operations, consider reaching out to SAP support for further assistance.