Software piracy! Cracked serial numbers! Thousands of commercial
products are posted on the warez sites and become available to all
every day! Companies lose millions of dollars every year to software
piracy, and faulty protection programs. Shareware developers look for
unbreakable protection for their products and create some protection
themselves or try many of the ready-made tools. Unfortunately most
tools have already been cracked, and self solutions often only take one
determined cracked a few hours to bypass. As a result they soon find
the stoles keys and product cracks on thousands of hacker Internet
pages.
It is time to turn to time tested, EXECryptor protection product.
EXECryptor is a powerful software tool that provide developers with
software protection from reverse engineering, analysis and
modifications. Its main difference from other protection tools is its
code transformation called "Code Morphing". This technology protects
the code on the CPU-command level. It is known the x86 processors
command system is redundant and allows the execution of the same
'code' using various different system commands. It breaks up the
protected code into several processor commands or small command
snippets and replace them by others, while maintaining the same end
result. Thus the protector obfuscates the code not on the source level
but on the level of the CPU commands.
The Code Morphing is multilevel technology containing hundreds of
unique code transformation patterns. In addition this technology
includes the special layer that transforms some commands into Virtual
Machine commands (like P-Code). Code Morphing turns binary code into an
undecipherable mess that is not similar to normal compiled code, and
completely hides execution logic of the protected code.
There is no concept of code decryption with this system Protected code
blocks are always in the executable state, and they are executed as a
transformed code. The original code is completely lost and code
restoration is an NP-hard problem.
The weak point of such scheme is that it significantly increases the
size and affects the speed of a program. But protecting an application
author usually doesn't need to transform its entire code. It is enough
to protect only critical parts of your code, responsible for serial
number verification, trial expiration date, and other evaluation
restrictions. The rest of application code remains intact and software
execution speed remains the same.
Below is a code sample generated by Delphi and a partial (the full
listing contains over 500 instructions) listing of the transformed
code.
Source code :
writeln('Test K');
After compilation
mov eax, [$ 004092ec]
mov edx, $00408db4
call @WLString
call @WriteLn
call @_ITest
After the code transformation (partial):
db 3
add al, $30
xlat
call +$000025b2
jmp +$00000eec
call +$00000941
or al, $4a
scasd
call -$304ffbe9
rol eax, $14
mov edi, [ebx]
jmp +$00001738
mov ebx, eax
shr ebx, $03
push ebx
jmp +$0001b5e
call -$000001eb
jmp +$00003203
jmp +$00005df8
call +$00000910
adc dh, ah
fmul st(7)
adc [eax], al
les eax, [ecx+$0118bfc0]
stosb
http://www.strongbit.com

Is there a solution to prevent crappy companies from spamming legitimate
news groups?

hanzprof@hotmail.com wrote:

Software piracy! Cracked serial numbers! Thousands of commercial
products are posted on the warez sites and become available to all
every day! Companies lose millions of dollars every year to software
piracy, and faulty protection programs. Shareware developers look for
unbreakable protection for their products and create some protection
themselves or try many of the ready-made tools. Unfortunately most
tools have already been cracked, and self solutions often only take one
determined cracked a few hours to bypass. As a result they soon find
the stoles keys and product cracks on thousands of hacker Internet
pages.

It is time to turn to time tested, EXECryptor protection product.
EXECryptor is a powerful software tool that provide developers with
software protection from reverse engineering, analysis and
modifications. Its main difference from other protection tools is its
code transformation called "Code Morphing". This technology protects
the code on the CPU-command level. It is known the x86 processors
command system is redundant and allows the execution of the same
'code' using various different system commands. It breaks up the
protected code into several processor commands or small command
snippets and replace them by others, while maintaining the same end
result. Thus the protector obfuscates the code not on the source level
but on the level of the CPU commands.

The Code Morphing is multilevel technology containing hundreds of
unique code transformation patterns. In addition this technology
includes the special layer that transforms some commands into Virtual
Machine commands (like P-Code). Code Morphing turns binary code into an
undecipherable mess that is not similar to normal compiled code, and
completely hides execution logic of the protected code.

There is no concept of code decryption with this system Protected code
blocks are always in the executable state, and they are executed as a
transformed code. The original code is completely lost and code
restoration is an NP-hard problem.

The weak point of such scheme is that it significantly increases the
size and affects the speed of a program. But protecting an application
author usually doesn't need to transform its entire code. It is enough
to protect only critical parts of your code, responsible for serial
number verification, trial expiration date, and other evaluation
restrictions. The rest of application code remains intact and software
execution speed remains the same.
--
Below is a code sample generated by Delphi and a partial (the full
listing contains over 500 instructions) listing of the transformed
code.

Source code :

writeln('Test K');

After compilation

mov eax, [$ 004092ec]
mov edx, $00408db4
call @WLString
call @WriteLn
call @_ITest

After the code transformation (partial):

db 3
add al, $30
xlat
call +$000025b2
jmp +$00000eec
call +$00000941
or al, $4a
scasd
call -$304ffbe9
rol eax, $14
mov edi, [ebx]
jmp +$00001738
mov ebx, eax
shr ebx, $03
push ebx
jmp +$0001b5e
call -$000001eb
jmp +$00003203
jmp +$00005df8
call +$00000910
adc dh, ah
fmul st(7)
adc [eax], al
les eax, [ecx+$0118bfc0]
stosb

http://www.strongbit.com