Unknown

Platform: spbctf | Category: Crypto | Type: Challenge | Difficulty: Easy | OS: NA | Author: XESXOR | Date: 2026-03-08 | Status: Solved Techniques: ASCII85/Base85 decoding, Identify encoding by character set

Summary

Task: File with unknown encoding. Solution: Identified ASCII85 encoding by character set and decoded using Python base64.a85decode().

Unknown — cryptokids20

Description

File encoded in ASCII85 (Ascii85). Decode to find flag.

Solution

base64.a85decode() reveals text with 'Flag: REDACTED' ‍​‌‌​​‌​​​‌‌​​‌​​​​‌‌​‌​​​​‌‌‌​​‌​​‌‌​​​‌​​‌‌‌​​​​​‌‌​‌‌​​​‌‌​​​​‍