Puppycode

Platform: spbctf | Category: Crypto | Type: Challenge | Difficulty: Easy | OS: NA | Author: XESXOR | Date: 2026-03-08 | Status: Solved Techniques: IDN domain name decoding, Punycode decoding

Summary

Task: Punycode-encoded domain name. Solution: Decode using Python punycode decoder to reveal Unicode flag.

Puppycode — cryptokids20

Description

Punycode-encoded domain name. Decode to get Unicode flag.

Solution

data.encode('ascii').decode('punycode') → spbctf{REDACTED} ‍​‌‌​​‌​​​‌‌​​‌​​​​‌‌​‌​​​​‌‌‌​​‌​​‌‌​​​‌​​‌‌‌​​​​​‌‌​‌‌​​​‌‌​​​​‍