Chapter 2 - MISC
What is MISC
MISC = All - Pwn - Web - Crypto - Reverse
Encoding & Decoding
A common and useful en-decoding tool website: CyberChef
- Unicode
- GBK
- Latin-1
Unicode
See Also Here: https://note.tonycrane.cc/cs/unicode/
- UTF (Unicode Transformation Format)
- UTF - 8: 兼容 ASCII
- UTF -16
乱码
不同的编码方式中不兼容的部分相互解码
Base Encoding
- Base-16
- Base-32: 5bit 一组, A-Z2-7
- 结果是 5 的倍数,不足用 = 补齐
- Base-64: 6bit 一组, A-Za-z0-9+/
- 采用字符表 (URL)
- 结果是 4 的倍数,不足用 = 补齐
- Base-n: bitstream -> integer -> n-进制 -> map by table
OSINT
Open Sourse INTeligence 开源网络情报
- 开盒出题者构造的虚拟身份
- 通过照片推断拍摄时间地点等信息 (main)