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: Allan Odgaard <email@hidden>
- Date: Tue, 6 Apr 2004 23:28:25 +0200
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> **
_______________________________________________
cocoa-dev mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/cocoa-dev
Do not post admin requests to the list. They will be ignored.