Subj : How to implement password protection?
To   : comp.programming
From : Markus Becker
Date : Fri Aug 19 2005 09:59 pm

Hi there,

how can implement some sort of password-protection
in one of my programs? I 'have heard of' (and know how to
use) MD5-hashes etc. But how is the general 'way to go' if I
want to implement several (i.e. two, 'user' and 'admin') levels
of functionality in a program?

- How can I savely store passwords without someone being able
  to easily decode them (MD5-hash?)?
- How do I implement some sort of group-membership that cannot
  be manipulated easily?
  
The user enters a password that he wants to use and I store
and save the MD5-hash of it. So I have a method to verify
entered passwords, but what about the group-membership?
  
Programming language and operating systems do not matter (ideally
it would be Delphi and Windows), I'm just looking for some algorithm
to solve the problem.

TIA

Markus

.