I love it. Thank you very much

with radare2 the answer is pretty straightforward

peda is good

doing this with ida is very challenging

Did you solve it without a debugger?

I tried with disassemble to C++ (with Snowman) but I failed, because I couldn't restore the second string in XOR operation.

Feels like IDA can figure out what str is

After going through @kcbowhunter's starter challenges this one is a piece of cake

totally agree

After going through @kcbowhunter's starter challenges this one is a piece of cake

totally agree

Should be easy with lower scores

IDA + F5 will help : )

b *main+164 c c c c