PingPong

Ping Pong

Category

Prog

Description

Could you get the flag ?

Format : Hero{flag}
Author : xanhacks

Files

• output.txt

Write up

Let's look at the file content.

$ cat output.txt
PONG
PING
PONG
PONG
PING
PONG
PONG
...

This looks like binary. Let's try to decode this to ASCII with PONG = 0 and PING = 1.

#!/usr/bin/env python3

decode = {
    "PONG": "0",
    "PING": "1"
}

bits = ""
with open("output.txt", "r") as content:
    for line in content:
        bits += decode[line.strip()]

for i in range(len(bits) // 8):
    print(chr(int(bits[i*8:i*8+8], 2)), end="")

Execution :

$ python3 solve.py 
Hero{p1n6_p0n6_15_fun}

Flag

Hero{p1n6_p0n6_15_fun}