Various aspect to the security problem in a database

The various aspects to the security problem are:

1. Legal, social and ethical aspects (for example, does the person making the request, say for withdrawing money from a bank, has legal rights for making the requested transaction?)
2. Physical controls (for example, is the computer or terminal room always locked or otherwise guarded.)
3. Policy Questions (for example, how does the enterprise owning the system decide who should be allowed access and to what?)
4. Operational problems (for example, is a password scheme is used, how are the passwords themselves kept secret? how often are they changed?)
5. Hardware controls (for example, does the processing unit provide any security features, such as the storage protection keys or a privileged operation mode?)
6. Operating system security (for example, does the underlying operating system erase the contents of storage and data files when they are finished with?)