Use the authorisation route to identify proposed values for customer developments
Emergency user concept
In general, we recommend you to use strong encryption mechanisms and to switch most users to an SSO login. You should then delete the hash values of the user passwords as described above. For release-dependent information on SNC client encryption, see SAP Note 1643878.
Another important factor that should be considered in an authorization concept is to use a uniform naming convention because, on the one hand, many things cannot be changed after the initial naming and, on the other hand, this ensures searchability in the SAP system. In addition, the preset authorization roles of the SAP system should never be overwritten or deleted, but only copies of them should be created, which can then be adapted as desired.
User Information System SUIM
If you want your own developments to meet your security requirements, just like the standard, you must assign table permission groups to the custom tables. Custom tables, or SAP standard tables that you want to protect in particular, belong to separate, if applicable, customer-specific table permission groups. If extensive permissions are to be granted for system administration or certain applications, this is done with the S_TABU_DIS authorization object for the table permission group. Since many standard tables do not have a table permission group assigned to them and therefore automatically end up in the table permission group &NC&, you should restrict access to this table permission group. For example, certain tables such as T000 (clients) are in a large table permission group (SS: RS: SAP control); therefore, it is better to restrict access via a separate table permission group. You should also always assign custom tables to a table permission group, otherwise they will also be assigned the table permission group &NC&. Therefore, we will explain below how you can create table permission groups and map tables.
With "Shortcut for SAP systems" you can automate the assignment of roles after a go-live.
The website "www.sap-corner.de" offers a lot of useful information about SAP authorizations.
The specifications for this should all be defined in the authorization concept documented in writing and must also be consistent with this.