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 (at) gmail (dot) com [email concealed]> 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:
>> -------------------
>> "
>> 000272B0002600FFD924114B0008C9A20DE70001027CC602002215FE0E9B005056C00001
00=
>> 5056C0000800000000000000E000000000000000E000000000000000E000000000000000
E00=
>> 0000000000000E000000000000000E000000000000000E000000000000000E0000000000
000=
>> 00E000000000000000E000000000000000E000000000000000E000000000000000E00000
000=
>> 0000000E000000000000000E000000000000000E000000000000000E000000000000000E
000=
>> 000000000000E000000000000000E000000000000000E000000000000000E00000000000
000=
>> 0E000000000000000E000000000000000E000000000000000E000000000000000E000000
000=
>> 000000E000000000000000E000000000000000E000000000000000E000000000000000E0
000=
>> 00000000000E000000000000000E0"
>> -------------------
>> and a user name may be "aliasghar.toraby (at) gmail (dot) com [email concealed]"
>> thanks for any help
>>
>
>
>

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