Introduction Encryption using reverse engineering

What type of encryption we learn

We mean that the encryption is encryption viruses (programs and hacker tools) for security companies
, Called (Anti-Virus) to Make the pass on the virus protection programs like any other file clean



What are the basic types of encryption reverse engineering

Encryption with Hex : One of the most important engineering tools and encryption is the basic

Each file or program or tool have a Hex Values

Be the values ​​of 10 000 and above  Virus protection program reveals its values ​​to 7 the values ​​of these 10 000 values
Meaning it is not detected in all of these values, the 10 000  This type of encryption is the basic 
Encryption with OllyDbg : Encryption would be through a revised codes programmed assembly language
You enter the file to be encrypted to revise the values ​​and change the entry point :

Example of assembly language codes :
push ebx
mov ebp, esp
sbb ecx, ecx
sbb ecx, 0
sbb ecx, 1
sbb ecx, 2
sbb ecx, 3
sbb ecx, 4
sbb ecx, 5
nop
jmp original entry point
nop
nop
nop
nop
retn

You can learn how to use OllyDbg :) search in YouTube Internet is full of all you need is to search