New "Complexity" Value

VMProtect
1

Hey Im wondering about the new “Complexity” option introduced with VMProtect 3.8.

What was the default internal value before the update made it configurable? Because if i set it to 100% it increases my file size by ~30MB

What exactly does a “complex” function inside of the VM mean and what does it protect you from?

Thanks

2

The “Complexity” sets the probability of creating complex handlers inside the virtual machine, which can consist of many simple operations. “Complexity = None (0%)” doesn’t create complex handlers and it works like previous versions. Complexity breaks all existing tools for analyzing/decompiling of virtualized code.

3

Thank you for the explanation!

Is it similar to inserting junk instructions like the Mutation?

Does Complex help against Reverse Engineering and does it impact performance?

EDIT: If i set it to 50%, will that still add complexity to ALL of the virtual machines?

4

So do you recommend setting it to 100%?

5

Hello,

I am also interested to know more about this option.
What is the default complexity value?
Which is the recommended one?
Why settings complexity at 20% produces smaller executables, then when setting complexity to none?

6

What is the default complexity value?

Options - Virtual Machine - Complexity has no the default value.

Which is the recommended one?

Any value more than 0%

Why settings complexity at 20% produces smaller executables, then when setting complexity to none?

Usually Complexity increases the size of a protected file.

7

You might be interested.
https://forum.vmpsoft.com/viewtopic.php?f=2&t=30297