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Re: hash function for creating an activation code
From: André Gasser <andre.gasser () gmx ch>
Date: Mon, 09 Nov 2009 22:02:43 +0100

Hi,

From a security perspective I would use SHA-256 since both, SHA-1 and MD5 should not be considered "secure" these days. In this case, where you are just generating a license file, computing time should not be an issue...

just my 0.02

andré

Shreyas Zare wrote:
Hi,

You can simple use MD5 or SHA1. MD5 is faster than SHA1, but is less
secure, so if your app is not being deployed in large scale then use
MD5.

Regards

On Mon, Nov 9, 2009 at 11:50 PM, Ali Asghar Toraby Parizy
<aliasghar.toraby () gmail com> wrote:
hi
I want to create a license file for my program
I have created a function that extract unique hex number of each network
adapters of host computer
When activation wizard starts, this unique number has been sent to a server
as a request code. Now i need a hash function that mix this number with a
user name and return a new code as an activation code to user.
So please suggest a hash function
request code is a string like this:
-------------------
"
000272B0002600FFD924114B0008C9A20DE70001027CC602002215FE0E9B005056C0000100=
5056C0000800000000000000E000000000000000E000000000000000E000000000000000E00=
0000000000000E000000000000000E000000000000000E000000000000000E0000000000000=
00E000000000000000E000000000000000E000000000000000E000000000000000E00000000=
0000000E000000000000000E000000000000000E000000000000000E000000000000000E000=
000000000000E000000000000000E000000000000000E000000000000000E00000000000000=
0E000000000000000E000000000000000E000000000000000E000000000000000E000000000=
000000E000000000000000E000000000000000E000000000000000E000000000000000E0000=
00000000000E000000000000000E0"
-------------------
and a user name may be "aliasghar.toraby () gmail com"
thanks for any help



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