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SAP Basis Operation is responsible for ensuring the technical functionality of an SAP system. It includes all the technical components mentioned above. These are used to perform the following tasks.
Application layer: The application layer is the central component of the SAP ERP system and is therefore also referred to as the base system. All applications and calculations are executed here. The application layer communicates with both the database layer and the presentation layer. On the one hand, it requests data from the database layer, processes it and then passes it on to the presentation layer. On the other hand, data that is newly entered in the presentation layer is passed on to the database layer and stored there.
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User authentication is usually performed by entering a user name and password. This information is called user credentials and should only be known to the user, so that no third party can gain access to the system under a false identity. This post explains how a user's password protection can be circumvented and how to prevent it. SAP system legacy data The login data of a user, including password, are saved in the USR02 database table. However, the password is not in plain text, but encrypted as a hash value. For each user there are not only one but up to three generated password hashes. Different algorithms are used to calculate these values, but only the Salted SHA1 can be considered sufficiently safe. Table deduction USR02 The secure password hash is located in the fifth column of the pictured table deduction with the heading Password hash value. The corresponding data field in the column is called PWDSALTEDHASH. Weak Password Hash Risks You have a good and working permission concept that ensures that no processes or data can be manipulated or stolen. A potential attacker now has the ability to read out your database with the password hashes. The hash values are calculated using password crackers, which are available on the Internet at home, and the attacker now has a long list of user credentials. To damage your system, the user will now search for the appropriate permissions and perform the attack under a false identity. Identifying the actual attacker is virtually impossible. Check if your system is vulnerable too Your system generates the weak hash values if the login/password_downwards_compatibility profile parameter has an unequal value of 0.
SAP Basis is responsible for the smooth operation of the SAP Basis system. The SAP Basis system is like an operating system for R/3 as well as S/4. Every operating system, such as Windows, provides an environment in which programs developed for that environment can run, such as MS Office. Likewise, the SAP Basis system provides an environment in which SAP programs can run. In any R/3 or S/4 system, there is a database server, such as HANA, where the database resides. It provides the necessary data to all other applications. The data here is not only data tables, but also applications, system control tables and user data.
Use "Shortcut for SAP Systems" to accomplish many tasks in the SAP basis more easily and quickly.
This means, of course, a certain initial effort for the creator, which nevertheless pays off more than if the quality is sufficient.
SAP Basis is the foundation of any SAP system. You can find a lot of useful information about it on this page: www.sap-corner.de.
The structure associated with it often proves to be especially important for companies that want to implement the SAP system for the first time.