What security levels are assigned to users?

Security levels are assigned by the administrator who is adding the user. There are four levels by default and additional levels can be composed as necessary.
* Reader - Has read-only access to the Web site.
* Contributor - Can add content to existing document libraries and lists.
* Web Designer - Can create lists and document libraries and customize pages in the Web site.
* Administrator - Has full control of the Web site. (More...)

Security levels are assigned by the administrator who is adding the user. There are four levels bydefault and additional levels can be composed as necessary.

Reader - Has read-only access to the Web site.
Contributor - Can add content to existing document libraries and lists.
Web Designer - Can create lists and document libraries and customize pages in the Web site.
Administrator - Has full control of the Web site. (More...)

Leaf (More...)

The are three levels of abstraction:
1.Physical level: The lowest level of abstraction describes how data are stored.

2.Logical level: The next higher level of abstraction, describes what data are stored in database and what relationship among those data.

3.View level: The highest level of abstraction describes only part of entire database. (More...)

Security in the context of ASP.NET application involves 3 fundamental operations [1,4,5]:
. Authentication: the process of validating the identity of a user to allow or deny a request [4,9,10]. This involves accepting credentials (e.g. username and password) from the users and validating it against a designated authority. After the identity is verified and validated, the user is considered to be legal and the resource request is fulfilled. Future request from the same user ideally are not subject to the authentication process until the user logs out of the web application.
. Authorization: the process of ensuring that users with valid identity are allowed to access specific resources.
. Impersonation: this process enables an application to ensure the identity of the user, and in turn make request to the other resources. Access to resources will be granted or denied based on the identity that is being impersonated. In other words, impersonation enables a server process to run using the security credentials of the client [6,9]. Thus, the ASP.NET applications are capable to execute the identity of client on whose behalf they are operating.
Since there are a lot of ASP.NET security features to cover, this paper will only focus on authentication in ASP.NET.


Shashi Ray (More...)

The security flow for ASP.NET page request is different from the classic ASP security flow. In ASP, IIS impersonates the authenticated user by default, and in ASP.NET, the developer has more control over configuring security at different level [2].


Shasi Ray (More...)

CAS is part of .NET security model that determines whether or not a piece of code is allowed to run and what resources it can use while running. Example CAS will allow an application to read but not to write and delete a file or a resource from a folder. (More...)

Thread Priority can be changed by using Threadname.Priority = ThreadPriority.Highest. In the sample provided look out for code where the second thread is ran with a high priority.
Following are different levels of Priority provided by .NET :-
. ThreadPriority.Highest
. ThreadPriority.AboveNormal
. ThreadPriority.Normal
. ThreadPriority.BelowNormal
. ThreadPriority.Lowest (More...)

Code Access Security (CAS), in the Microsoft .NET framework, is Microsoft's solution to prevent untrusted code from performing privileged actions.

It performs following function
1. Defines permissions and permission sets that represent the right to access various system resources.
2. Enables administrators to configure security policy by associating sets of permissions with groups of code (code groups).
3. Enables code to request the permissions it requires in order to run, as well as the permissions that would be useful to have, and specifies which permissions the code must never have.
4. Grants permissions to each assembly that is loaded, based on the permissions requested by the code and on the operations permitted by security policy.
5. Enables code to demand that its callers have specific permissions.
6. Enables code to demand that its callers possess a digital signature, thus allowing only callers from a particular organization or site to call the protected code.
7. Enforces restrictions on code at run time by comparing the granted permissions of every caller on the call stack to the permissions that callers must have. (More...)

Security can in SharePoint be handled at the machine, domain, or SharePoint level. (More...)