Crypto CTF 2020
51 challenges with 96 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.
Full task list on CTFtimeCryptography19
Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.
Also written up in: pcw109550/write-up, pcw109550/write-up
- matrix
- ecc
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
Also written up in: pcw109550/write-up, pcw109550/write-up
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
Also written up in: Ewael/CTFs, Ewael/CTFs
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, john_pollard
2020 06 09 RACTF 2020 01
1 official solutionAlso written up in: deut-erium.github.io
2020 06 09 RACTF 2020 02
1 official solutionAlso written up in: deut-erium.github.io
2020 06 09 RACTF 2020 03
1 official solutionAlso written up in: deut-erium.github.io
2020 06 09 RACTF 2020 04
1 official solutionAlso written up in: deut-erium.github.io
2020 06 09 RACTF 2020 05
1 official solutionAlso written up in: deut-erium.github.io
2020 06 09 RACTF 2020 06
1 official solutionAlso written up in: deut-erium.github.io
B007L36 CRYP70 4641N 2020 06 09 RACTF 2020 B007L36 CRYP70 4641N
1 official solutionAlso written up in: deut-erium.github.io
Bacon
1 official solutionAlso written up in: xuanxuanblingbling.github.io
BOO7l3G CRYP70 2020 06 09 RACTF 2020 BOO7l3G CRYP70
1 official solutionAlso written up in: deut-erium.github.io
Its as easy as access0000 2020 06 09 RACTF 2020 Its as easy as access 0000
1 official solutionAlso written up in: deut-erium.github.io
Really Secret Algorithm 2020 06 09 RACTF 2020 Really Secret Algorithm
1 official solutionAlso written up in: deut-erium.github.io
Really Simple Algorithm 2020 06 09 RACTF 2020 Really Simple Algorithm
1 official solutionAlso written up in: deut-erium.github.io
Really Small Algorithm 2020 06 09 RACTF 2020 Really Small Algorithm
1 official solutionAlso written up in: deut-erium.github.io
Really Speedy Algorithm 2020 06 09 RACTF 2020 Really Speedy Algorithm
1 official solutionAlso written up in: deut-erium.github.io
Rsa Houseplant 2020
1 official solutionAlso written up in: ctf.rip
RSA Roarctf Rsa
1 official solutionAlso written up in: f61d.github.io
Uncategorised18
The upstream scoreboard did not say, so neither do we.
Cry Amsterdam
2 official solutionsAlso written up in: wani-hackase/wani-writeup, wani-hackase/wani-writeup
Cry Trailing
2 official solutionsAlso written up in: wani-hackase/wani-writeup, wani-hackase/wani-writeup
13377 43de0a0efed6ed7bd890d1c79db22fb1
1 official solutionAlso written up in: akashsuper2000/ctf-archive
20 Problems Second Round Hgaso
1 official solutionAlso written up in: nguyenduyhieukma/CTF-Writeups
AES GCM
1 official solutionAlso written up in: nguyenduyhieukma/CTF-Writeups
Collisions
1 official solutionAlso written up in: nguyenduyhieukma/CTF-Writeups
CPA game
1 official solutionAlso written up in: nguyenduyhieukma/CTF-Writeups
Ecdlp
1 official solutionAlso written up in: utisss/ctf
Flags
1 official solutionAlso written up in: estebancano-dev/CTF-Writeups
Hidden RSA
1 official solutionAlso written up in: nguyenduyhieukma/CTF-Writeups
Also written up in: utisss/ctf
Miller Rabin revisited
1 official solutionAlso written up in: nguyenduyhieukma/CTF-Writeups
Orthomorphisms
1 official solutionAlso written up in: nguyenduyhieukma/CTF-Writeups
Also written up in: nguyenduyhieukma/CTF-Writeups
Script
1 official solutionAlso written up in: Ewael/CTFs
Also written up in: bigpick/barelycompetent
Also written up in: blatchley/CTF_Writeups
Stairs Box
1 official solutionAlso written up in: nguyenduyhieukma/CTF-Writeups
Misc14
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Also written up in: pcw109550/write-up, AC01010/CTF-Writeups, pcw109550/write-up, vnc1106/CTF-WriteUps, atuc17/CTF
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Also written up in: pcw109550/write-up, pcw109550/write-up, vnc1106/CTF-WriteUps
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Also written up in: pcw109550/write-up, TheWinRaRs/Writeups, pcw109550/write-up, pcw109550/write-up
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Also written up in: pcw109550/write-up, pcw109550/write-up, vnc1106/CTF-WriteUps, atuc17/CTF
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Also written up in: Ewael/CTFs, Ewael/CTFs
- substitution
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Also written up in: pcw109550/write-up, pcw109550/write-up
- hill
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Also written up in: AC01010/CTF-Writeups
- pow
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Also written up in: AC01010/CTF-Writeups
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
- knapsack
Same technique in picoCTF: PW Crack 2, Permissions, Specialer