Decrypting using MD5

[3bood ghzawi]

Hi all, i use the following code to encrypt a string using MD5: using System.Security.Cryptography; public static string EncodePassword(string originalPassword) { Byte[] originalBytes; Byte[] encodedBytes; MD5 md5; // Conver the original password to bytes; then create the hash md5 = new MD5CryptoServiceProvider(); originalBytes = ASCIIEncoding.Default.GetBytes(originalPassword); encodedBytes = md5.ComputeHash(originalBytes); // Bytes to string return System.Text.RegularExpressions.Regex.Replace(BitConverter.ToString(encodedBytes), "-", "").ToLower(); } But i don't know how to decrypt it using MD5 ???????? Do anyone help me ????????? Regards...

[Lost User]

MD5 is one way encryption, you cannot decrypt it, you can only compare the encrypted value against a dictionary to see if it matches are predefined list of encrypted strings. See this[^] wikipedia article.

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[OriginalGriff]

In addition to Elliots response, you should not use MD5 for new applications - it is considered "broken" and should not be used for any new development. Use SHA512 instead, until the SHA 1024 specification comes out in 2012.

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[Dave Kreskowiak]

You don't. MD5 is a one-way hash. You cannot get the original string back from the encrypted hash.

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