CTF Writeup (Crypto)
This repository contains my writeup or ... corpse LoL.
Writeups of the following challenges from CTFs:
| S.No. | CTF name | Challenge-Name | Points | Vulnerability/Concept | Level of Difficulty |
|---|---|---|---|---|---|
| 1 | Insomni'hack teaser | Rule86 | 78 | Number Theory/z3 | |
| 2 | ACEBEAR Security Contest | CNVService | 856 | CBC-Bit Flipping Attack | |
| 3 | Codegate Preliminary | RSAbaby | 349 | Euler's Thm + FLT on RSA | |
| 4 | Pragyan CTF | RSA's Quest | 200 | Chosen Ciphertext Attack | |
| 5 | N1CTF | Baby N1ES | 85 | Feistel Network Reverse | |
| 6 | N1CTF | RSA Padding | 303 | Franklin Reiter's related message attack | |
| 7 | b00t2root'18 | RSA-2 | 200 | Franklin Reiter's related message attack | |
| 8 | Volga CTF Quals | Nonsense | 200 | Number Theory | |
| 9 | Swamp CTF | Locked-Dungeons-2 | 498 | CBC-Bit Flipping Attack | |
| 10 | Midnight Sun CTF Quals | Hm4c | 50 | Bit by Bit decryption | |
| 11 | Meepwn CTF Quals | Bazik | 100 | Coppersmith's Stereotyped | |
| 12 | Tokyo Westerns CTF | Revolutional-Secure-Angou | nil | Number Theory + RSA | |
| 13 | noxCTF | WTF | 742 | Wiener's Attack | |
| 14 | noxCTF | Trinity | 794 | Hastad's Broadcast Attack | |
| 15 | noxCTF | Decryptor | 447 | Chosen Ciphertext Attack | |
| 16 | HackIT CTF | Into The Darkness | 862 | CBC Bit Flipping Attack | |
| 17 | HITCON CTF | Lost-Key | 257 | LSByte Oracle Attack | |
| 18 | CSAW CTF Finals | Disastrous Security | 400 | Breaking MTRNG to get k and forge DSA |
|
| 19 | Hxp CTF | Daring | 105 | Weak padding + Number Theory + small RSA exponent |