Encrypt a 24 character string into 64 characters in c#?

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hi friends..How to Encrypt a 24 character string input into 64 characters? And if i Decrypt the 64 character output i want the same 24 character input back..It is posible please give me the solution..

Posted 18-May-14 20:56pm

Manivignesh

Updated 18-May-14 21:15pm

King Fisher

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Kornfeld Eliyahu Peter 19-May-14 3:07am

If you are looking for fixed size (why?) output, you probably have to look for hash - in your case to a two way hash...

Manivignesh 19-May-14 3:21am

ok thanks...could u give me code for generate 64 char using hash in c#?

Kornfeld Eliyahu Peter 19-May-14 3:29am

No, but Google can!

Rob Philpott 19-May-14 5:07am

Yes it can be done. You can encrypt 24 bytes of data into 24 bytes of encrypted data so with 64 bytes you've got plenty of room to play with. To do this, you need a key though. The pertinent question is how secure does it need to be?

Manivignesh 19-May-14 6:28am

Yes it should be secured..and the important thing is that 64 character output should be able to Decrypt also..

Bernhard Hiller 19-May-14 8:18am

Do you think of "Base64 encoding"? If so, look at
http://stackoverflow.com/questions/11743160/how-do-i-encode-and-decode-a-base64-string

Manivignesh 19-May-14 9:14am

Thanks for the code...In this code i can't get the exact output of 64 characters..actually i want the output of particular 64 characters from the given 24 characters input..My need is i want to set the output characters size from my side..if it is possible pls give the code..

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OriginalGriff · Answer 1 · 2014-05-18T21:08:00

Solution 1

That isn't really a question we can just answer - there are a huge number of ways you could do that, depending on the complexity and security you need. The only problem is the fixed size output - it is difficult to predict the size of the output since most complicated encryption systems generate "block" outputs which aren't normally 64 byte blocks.

So start here: Wiki Encryption[^] and branch out fvrom there using Google, or explain what you are trying to achieve, and we'll see if we can help - it may be that you are going down a completely wrong avenue! For example, if this is for passwords, then encryption is a poor idea - you should be hashing your data instead, which always produces a fixed size output, regardless of the input size.

Posted 18-May-14 21:08pm

OriginalGriff

Comments

Manivignesh 19-May-14 3:21am

ok thanks...could u give me code for generate 64 char using hash in c#?

Nelek 19-May-14 4:06am

Did you really read the answer? He told you it is not possible to give you a "ready-to-go" solution. You are not giving any information and there are so many possibilities depending on what you really need, that is very difficult for people here to help.

Please read:
What have you tried?[^]
How to ask a question?[^]

Manivignesh 19-May-14 9:19am

Thanks for the solution..actually i want the output of particular 64 characters from the given 24 characters input..My need is i want to set the output characters size from my side..if it is possible pls give the code..

The14thNoah 19-May-14 3:41am

you can use google to search for it. . .internet is our best buddies for this programming-related-questions :)

balajidileepkumar · Answer 2 · 2014-05-18T23:15:00

Solution 2

http://stackoverflow.com/questions/10168240/encrypting-decrypting-a-string-in-c-sharp[^]

Refer the above Link
You can Use any type of algorithm
http://msdn.microsoft.com/en-us/library/system.security.cryptography.des(v=vs.110).aspx[^]

Posted 18-May-14 23:15pm

balajidileepkumar

CPallini · Answer 3 · 2014-05-18T23:37:00

Solution 3

That's really not difficult.

Choose an encryption implementation using a suitable minimum block (for instance 16 bytes).
Add to your input 40 'salt' bytes, encrypt it all.

After decryption, remove the salt data to get back your original input.

Posted 18-May-14 23:37pm

CPallini

Comments

Manivignesh 19-May-14 6:29am

Thanks bro...can you explain this or give any example?i cant understand..

Manivignesh 19-May-14 9:16am

Thanks for the solution..actually i want the output of particular 64 characters from the given 24 characters input..My need is i want to set the output characters size from my side..if it is possible pls give the code..