Simple 2 way encryption for C#

I'm looking for very simple encrypt and decrypt functionality for some data. It's not mission critical. I need something to keep honest people honest, but something a little stronger than ROT13 or Base64.

How to Check Authenticity of an AJAX Request

I am designing a web site in which users solve puzzles as quickly as they can. JavaScript is used to time each puzzle, and the number of milliseconds is sent to the server via AJAX when the puzzle is completed. How can I ensure that the time received by the server was not forged by the user?

Best way to use PHP to encrypt and decrypt?

I plan to store foreign account information for my users on my website, aka rapidshare username and passwords, etc... I want to keep information secure, but i know that if i md5 their information, i can't retrieve it later to use.

It`s possible to break a sha1(md5("password")) password?

This is the question: It`s possible to break a sha1(md5('password')) password ?

Better way save password in mysql which can be decrypted also using php

I am currently using md5 function to encrypt my password and save to mysql db which can not be decrypted.

Did I find a bug in PHP"s `crypt()`?

I think I may have found a bug in PHP's crypt() function under Windows.

Encrypting a folder for an Android app?

The app I am working on gets all the files from the sdcard but these files are really important and the app should maintain a security issue .So is there a way that the folder or directory that contains the file may be encrypted or locked with a key and only be used by my app? Please help I am newbie and stuck at this point.

Iphone Build Release with encryption

Hello i just want to ask if i build my iphone app for release is it encrypted or not? When the encryption happens? How can i understand if a build is encrypted or not?

SQLCipher Working But Incorrect Password

I've just implemented SQLCipher in my app to encrypt one fairly simple database. I followed all of the setup instructions carefully on this tutorial and the project is building and the app is running successfully. However, when I use their sample code to encrypt my database, my password is somehow incorrect and I am now unable to open my database. Here is the code: