# 2020

- [FCSC Prequals 2020](/2020/fcsc_prequals_2020.md)
- [Keykoolol (reverse, 500)](/2020/fcsc_prequals_2020/keykoolol.md)
- [Macaron (crypto, 200)](/2020/fcsc_prequals_2020/macaron.md)
- [Merry (crypto, 500)](/2020/fcsc_prequals_2020/merry.md)
- [SSEcret (reverse, 500)](/2020/fcsc_prequals_2020/ssecret.md)
- [Why not a sandbox? (pwn, 500)](/2020/fcsc_prequals_2020/why_not_a_sandbox.md)
- [European Cyber Week CTF Qualifiers 2020](/2020/ecw_quals_2020.md)
- [Antirdroid](/2020/ecw_quals_2020/antirdroid.md)
- [Windtalkers](/2020/ecw_quals_2020/windtalkers.md)
- [DefCamp CTF 2020](/2020/defcamp_ctf_2020.md)
- [dumb-discord, spy agency, cross me, syntax check](/2020/defcamp_ctf_2020/writeups.md)
- [ångstromCTF 2020](/2020/angstromctf_2020.md)
- [RSA-OTP](/2020/angstromctf_2020/rsa-otp.md)