Message-Id: Comments: Authenticated sender is From: "Salvador Eduardo Tropea (SET)" Organization: INTI To: sparhawk AT eunet DOT at (Gerhard Gruber), djgpp AT delorie DOT com Date: Tue, 30 Jun 1998 10:53:35 +0000 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: Re: This is not a problem but... In-reply-to: <359ee3c4.2998738@news.Austria.EU.net> Precedence: bulk sparhawk AT eunet DOT at (Gerhard Gruber) wrote: > Destination: Dim Zegebart > From: Gruber Gerhard > Group: comp.os.msdos.djgpp > Date: Mon, 29 Jun 1998 09:25:13 +0400: > > >most known or just XOR). SO, your strings now looks like a garbage and > > XOR is pretty boring. If you know what you are searching for, it is a matter > of minutes to locate and change something encoded with XOR. You don't even need to know what to search, if they are strings the space frequency and the limited range (a-z A-Z) makes the task trivial. XOR isn't a solution, at least not if you use a static value for the XOR. A dinamic value can be used giving a little more of security but it can be breaked anyways. Some time ago I did a small batch and I wanted to protect it because it had a password so I converted the .bat to .com, then the .com to .exe, then compressed the exe and finally encripted it. Looks secure no? ... not at all, a couple of years latter I lost the password so I was forced to break my "secure" system. It took me less than 10 minutes using a debugger ;-) SET ------------------------------------ 0 -------------------------------- Visit my home page: http://set-soft.home.ml.org/ or http://www.geocities.com/SiliconValley/Vista/6552/ Salvador Eduardo Tropea (SET). (Electronics Engineer) Alternative e-mail: set-soft AT usa DOT net set AT computer DOT org ICQ: 2951574 Address: Curapaligue 2124, Caseros, 3 de Febrero Buenos Aires, (1678), ARGENTINA TE: +(541) 759 0013