Explanation
Authorization object S_RFCACL is required to support trusted system access by an RFC user following the configuration of a Managed System in SAP Solution Manager. This authorization object allows you to restrict access to RFC calls from trusted systems based on the RFC user name and the name of the calling system.
References:
https://help.sap.com/viewer/bf82e6b26456494cbdd197057c09979f/7.2.10/en-US/4a0c1f51bb571014e10000000a
https://help.sap.com/viewer/bf82e6b26456494cbdd197057c09979f/7.2.10/en-US/4a0c1f51bb571014e10000000a

Explanation
These are some of the tools that you can use to troubleshoot an authorization issue with a Fiori application.
/IWFND/ERROR_LOG is a transaction that displays the error log for the SAP Gateway framework, which handles the OData requests and responses between the Fiori front-end server and the back-end system.
/IWBEP/ERROR_LOG is a transaction that displays the error log for the SAP Gateway service implementation, which contains the business logic and data access for the OData services. References:
https://help.sap.com/viewer/a7b390faab1140c087b8926571e942b7/7.5.9/en-US/5c3d6d0f6c461014a1d99bc8a4f

Explanation
To enable access between tenant databases in an SAP HANA system for multitenant database containers, you need to do these steps: activate the cross-tenant database communication parameter in the global.ini file, add the bi-directional communication channel to the allow list parameter in the global.ini file, and grant the user in the source system the required privileges in the target database using a remote source object. References:
https://help.sap.com/viewer/6b94445c94ae495c83a19646e7c3fd56/2.0.05/en-US/20d5f6af75191014b47cf39247
https://help.sap.com/viewer/6b94445c94ae495c83a19646e7c3fd56/2.0.05/en-US/20d5f6af75191014b47cf39247

Explanation
These are some of the tasks that you would perform to allow increased security for the SAP Web Dispatcher WebAdministration interface, which is a web-based tool for configuring and monitoring the SAP Web Dispatcher instance. You can use access restrictions with the icm/HTTP/auth_<xx> profile parameter, which allows you to define rules for allowing or denying access based on IP addresses, host names, or URLs. You can also use Secure Socket Layer (SSL) for encrypted access, which protects the communication between your browser and the WebAdministration interface using certificates and keys. References:
https://help.sap.com/doc/saphelp_nw70ehp3/7.03/en-US/c8/e8d53d35fb11d182b90000e829fbfe/content.htm?no_

Explanation
These are some of the information that constitutes an indirect connection to an individual, in the context of GDPR (General Data Protection Regulation). GDPR is a regulation that aims to protect the privacy and personal data of individuals in the European Union (EU) and the European Economic Area (EEA). Personal data is any information that relates to an identified or identifiable individual, either directly or indirectly. An indirect connection means that the information can be used in combination with other information or identifiers to identify an individual. Examples of such information are IP address, license plate number, date of birth, location data, or online identifiers. References: https://gdpr-info.eu/art-4-gdpr/
https://gdpr-info.eu/art-4-gdpr/