15,968,824 members
1.00/5 (2 votes)
See more: , +
how to do Encryption and Decryption the file in asp.net???
Posted

## Solution 1

Considering you want to encrypt and then decrypt (when needed) content of some file, try article at File Encryption and Decryption in C#[^]

I believe it should serve the purpose.

-Milind

## Solution 2

I thinks you should first understand the basic concept of Encryption and Decryption Algorithm
Ex. Learn more about RSA, MD5 algorithms ie how these algorithms work Theoretically then implement in any Lang(C#,F#,VB.net,J#)

Link : http://www.di-mgt.com.au/rsa_alg.html[^]

http://en.wikipedia.org/wiki/RSA_(algorithm)[^]

## Solution 4

Hi,

I think this article can help you:
Public Key RSA Encryption in C# .NET[^]

## Solution 3

1st write this function on your page:

C#
```public static string ConvertToBin(string asciiString)
{
StringBuilder sb = new StringBuilder();
foreach (string letter in asciiString.Select(c => Convert.ToString(c, 8)))
{
sb.Append(letter);
}
return sb.ToString().Substring(0,5);
}```

then write this coding where u want to show ur encrypt key like textbox means write like this it show 5 digit encrypt key:

C#
```TextBox1.Text = ConvertToBin(a);
TextBox2.Text = ConvertToBin(content.Substring(content.Length - 5, 5)); RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
TextBox3.Text = ConvertToBin(rsa.ToXmlString(true).Substring(15, 5));
TextBox4.Text = ConvertToBin(rsa.ToXmlString(true).Substring(15, 5));
TextBox5.Text = ConvertToBin(rsa.ToXmlString(true).Substring(22, 5));
TextBox6.Text = content;```

v2

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Top Experts
Last 24hrsThis month
 Richard Deeming 165 Luc Pattyn 50 OriginalGriff 23 John Smith 27 10 Sergey Alexandrovich Kryukov 5
 OriginalGriff 361 Pete O'Hanlon 265 Dave Kreskowiak 155 merano99 115 Richard Deeming 95

CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900