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What is a secure way to use PHP tokens in a C# application

I have a C# app that is sending post requests to and from a php script. I have token based authentication setup on the php, and I have my C# app sending the tokens, however, even with obfuscation, if ...
8
votes
6answers
2k views

Protect PHP hashing algorithm (from bots)

First of all, I'm new to this whole crypto thing. Here's my scenario: I have a client app, that sends a 20char max string to my server. The server then checks if the name is indeed matching the char ...
49
votes
4answers
13k views

How to approach replacing md5 for transporting Unity game data to a remote server

TL;DR I am working on a gaming system that uses UnityScript and C# on the client and PHP on the server. A MD5 hash of the data plus a shared secret is used to check that the data has not been ...
2
votes
3answers
1k views

Using HTTP GET instead of a POST request can leak source code?

Is it possible to leak the server-side code of a website if a GET request is sent instead of a POST request to a page? The idea is that if a POST request is made to a webpage e.g. http://<server ...
3
votes
4answers
1k views

Lock a website login to a certain computer

I've got a web based system where a specific site only shall be available on a certain computer. On that computer I have a desktop application. The desktop application and the website communicate ...