How to encrypt and decrypt using C# in window base programme

Question

Dear all, Please help me solving following query. I want to encrypt and decrypt password in window base programme using C#. How can I do it? Thanks and regards, Swapnil.

Bindels Laurent · Answer

if you use hashkeys (md5), you cannot decrypt these... Hashkeys are not reversible. If you want to crypt and decrypt the password. You must use a symetric or asymetric encryption. To do that, you must have keys. For example, for a symetric encryption, you can use an AES key with the Raendal algorithm. You will easy find sample on google.

Swapnil Palande · Answer

Hi all, I have got the solution from somewhere, have a look at it - public string Encrypt(string inp) { MD5CryptoServiceProvider hasher = new MD5CryptoServiceProvider(); byte[] tBytes = Encoding.ASCII.GetBytes(inp); byte[] hBytes = hash.ComputeHash(tBytes); StringBuilder sb = new StringBuilder(); for (int c=0;c sb.AppendFormat("{0:x2}",hBytes[c]); return(sb.ToString()); }

Krishnaraj L · Answer

Well swapnil, there are so many ways you can do this. One simple way is like this (easy to crack ;-)) public void Encrypt( ref string strPassword) { byte [] sByBuf = Encoding.ASCII.GetBytes(strPassword); for ( int nCtr = 0 ; nCtr sByBuf[nCtr] = Convert.ToByte (Convert.ToInt64 (sByBuf[nCtr]) + 4); strPassword = Encoding.ASCII.GetString ( sByBuf ); } public void Decrypt( ref string strPassword) { byte [] sByBuf = Encoding.ASCII.GetBytes(strPassword); for ( int nCtr = 0 ; nCtr sByBuf[nCtr] = Convert.ToByte (Convert.ToInt64 (sByBuf[nCtr]) - 4); strPassword = Encoding.ASCII.GetString ( sByBuf ); } Or if you want a better method, search for RSACryptoServiceProvider in MSDN for Encrypt and Decrypt. You will get sample code as well. Regards, Krishnaraj