Re: Protecting Software w/ Software License Keys...
Re: Protecting Software w/ Software License Keys...
- Subject: Re: Protecting Software w/ Software License Keys...
- From: Malte Tancred <email@hidden>
- Date: Tue, 18 Jun 2002 09:41:28 +0200
On tuesday, june 18, 2002, at 12:00 , Kyle Moffett wrote:
How could a cracker get past this? The government uses public-private
key cryptography for confidential material. Are you saying that
somebody
could get past confidential security in a matter of days, or is my
system
missing some step or something.
I believe these are two different problems. The government is not
distributing programs but rather encrypted data. It's the data that's
important and need to be protected, not the program used for
viewing/editing the (unencrypted) data.
If you use a strong enough cryptographic algorithm you need the private
to decrypt the encrypted data. It doesn't matter if you have access to
the source of the program that was used to encrypt the data, or the
program used to decrypt it. You _need_ the private key to decrypt the
data.
When you're trying to limit a program from executing some functions
according to some defined rule set, this will always end up as
instructions to the processor, and if you have access to the program and
the environment in which it is executed you can change those
instructions, or the instructions calling them.
There's the difference I think, and that's why a hackar/cracker can
always break your app as long as the binary is distributed (ie supposed
to run on the user's computer).
Just a few thoughts.
Cheerio,
Malte
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