Re: [little OT] Licensing/Implementing in Cocoa/Obj-C
Re: [little OT] Licensing/Implementing in Cocoa/Obj-C
- Subject: Re: [little OT] Licensing/Implementing in Cocoa/Obj-C
- From: MT <email@hidden>
- Date: Tue, 6 Apr 2004 22:46:31 +0100
There probably isn't too many crackers on the Mac, and I don't think
someone who spends a significant amount time cracking something was
ever going to buy it anyway.
I think a lot of piracy going on is largely accidental, I know a lot of
companies who buy, say 10 licenses for PhotoShop, but as the business
expands, use it on 15-20 machines, PhotoShop has become part of the
furniture, and nobody realizes they need to buy more licenses. Many
programs like MS Office and Quark use the local network to discover
other instances of the software, this is a bit invasive for my liking,
and can easily be worked around with a firewall.
just my 2 cents.
Moray
On 6. Apr 2004, at 22:56, Stefan Pantke wrote:
We implemented a licensing system based on public-key cryptography.
RSA is used to create a license and to very the license from within
the application.
How many bits do you use for the keys? Most likely the user will
receive the serial number via email and it shouldn't be too long, and
will be base64 encoded (or perhaps even base32 encoded) -- that puts a
damper on the number of bits and thus the security.
I once followed the bulletin board of a cracker site (to get some
insight in their workings), and a lot of applications with even 128
bit keys were cracked routinely, although the attack seemed to be on
the random number generator (for creating the primes in the first
place). At least that was my take on it.
But to my knowledge there isn't such advanced crackers on the Mac, is
there? :) Although we did have a guy state he could break 128 bit AES
in no time, but hopefully he will only use this power for good... ;)
** Cocoa FAQ: <http://www.alastairs-place.net/cocoa/faq.txt> **
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