Is my invitation based file access authorization scheme worthwhile?



I need to allow users to upload files with sensitive data to a server, then invite other authenticated users to access specific files.This is my proposed solution:Each user will have his own folder to which he uploads files, and the parent folder will have an .htaccess with deny all to block direct access. (This already works well.)Then, an invited user will get a generated SHA1 invitation id and the url will be something like download/[sha1]/file and I can then use my controller to check

Related to : Is my invitation based file access authorization scheme worthwhile?
In MVC3 how to restrict access to an Area with a role-based authorization?
Information Security

In MVC3 we can restrict access to a Controller using the [Authorize] attribute, specifying that the user must be in the Administrator role to access any controller action in the class, like in the following example...


[Authorize(Roles = "Administrator")]
public class MyDefaultController : Controller
{
// Controller code here
}

However how to restrict acces to an entire Area in MVC3 without specify the [Authorize] attribute for each Controller class inside the Area?


Passing hidden invitation token field after being redirected from openid authorization
Information Security

I'm trying to combine Ryan Bates' Beta invitations and Open id. The way it is setup is so that signup form has hidden field, invitation token that allows user to sign up. The invitation token is sent in url: /signup/:invitation_token


However when I use open_id, it redirects back to just /signup url without the invitation token. How do I have it so that the token is still being pass after the redirect. Here's the relevant code in open_id_authorization plugin


def open_id_redirect_url(open_id_request, return_to = nil, method = nil)
open_id_request.return_to_args['_method'] = (method || request.method).to_s
open_id_request.return_to_a
Difference between authorization scheme and authorization model
Information Security

A quick and (hopefully simple) question. What is the difference between authorization scheme and authorization model?


Securing Files over Web: Fine Grained Authorization Based File Access
Information Security

I have a system where employees can upload files. There are three ways


Upload to my account in public, private or protected mode
Upload to department account in public, private or protected mode
Upload to organization account in public, private or protected mode


where public is visible to anyone, private to the group or person only and protected to anyone in the organization.


All the files for an organization are stored in a directory say, /files/<organizationId>/, on file server
like


files
+-- 234809
| +img1.jpg
| +doc1.pdf<

What makes a heap-based Scheme slower than a stack-based Scheme?
Information Security

I am developing a compiler for a language similar to Scheme, and am reading through Dybvig's thesis. In it, he says that achieved most of his performance gain by allocating call frames on the stack instead of on the heap. There's several tricks that need to be done in order to actually make this work in the presence of closures and continuations.


My question is where does this performance gain come from? Is it purely because we put less strain on the garbage collector?


Put another way: Assuming we have an infinite amount of memory, would stack allocated call frames still be faster than heap allocated call frames?


Is my invitation based file access authorization scheme worthwhile?
Information Security
I need to allow users to upload files with sensitive data to a server, then invite other authenticated users to access specific files.This is my proposed solution:Each user will have his own folder to which he uploads files, and the parent folder will have an .htaccess with deny all to block direct access. (This already works well.)Then, an invited user will get a generated SHA1 invitation id and the url will be something like download/[sha1]/file and I can then use my controller to check

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