Sujet ? Projet d'apéro AF Bordeaux ? [dpt33]

Citation : Posté le 04/11/2005 à 06:10

Citation : Ne me poussez pas ou je fais un nouveau morceau.

Hors sujet :

Info from Syncrosoft website:

[quote] "Syncrosoft's protection solution is different from
mainstream software copy protection methods. It is based on a
secure executer, the eLicenser, and the patented MCFACT
technology" "At runtime, the transformed program code does not
reveal its semantics. The eLicenser's crypto-services are called
from time to time by the transformed program code." The
transformed program code is represented as tables in the computers
memory. An adversary can not reverse-engineer or debug the tables,
because a reverse transformation from the tables to original
program code is not feasible. If the tables are manipulated, the
transformed program code will crash or produce invalid results."
[ENDQUOTE]

So its not crackable?...

Now here is the explanation for what really goes on:

Transformation is based on replacing ordinary machine code into
tables representing results from calculations

Example:

Adding 2 numbers Normal machine-code would look something like :

Add eax, ebx

This will take 1 CPU cycle to execute.

Now comes MCFACT :

1) Transform the first number into a table

2) Transform the second number into a table

3) Do allot of manipulation of these tables

4) More manipulation

5) Transform the Tables back to the numbers

6) Add the 2 numbers

This entire piece takes up hundreds of machine code lines and a
lot of loops inside this code...estimated CPU-cycles <insert
number greater than 1 here>

No performance loss? We don't think so..........

And this code runs all the time!!......The dongle in fact is only
called 1 out of 10 times inside these scripts.........

A good example is the protection build in the midi-part. This is
entirely wrapped in the script-crap. Try moving a note and swirl
it around.....you should notice a sluggishness in the movement.

In fact u will notice an improvement in version 3.1 prior to the
3.0 release. This is not due to improvements made by Steinberg
(the midi-engine is still the same) but improvements made by
Syncrosoft! (They optimized the script engine)!!!!!!!

To give the end user some peace of mind: the scripts aren't built
into the real-time audio-engine.....this is impossible because of
the performance loss u would have from the MCFACT.

Citation : Je me fais trop chier au taf

Citation : Je n'ose pas aller écouter vos nouvelles productions car ça va me donner envie de rebrancher le matos au risque de me détourner de mon objectif professionel