# Challenges

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Medium

Overheard

Two messages went out encrypted the same way. You caught the first one in the clear and both ciphertexts. Read the se...

150 points 2 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

Fingerprint

All you get is the SHA-256 fingerprint of a secret word. Recover the word and wrap it as T43CTF{...}. Source is provided.

75 points 8 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

Sponsored by InvataCyber

Operațiunea HashXOR

Pe o stație compromisă au fost găsite două fișiere. Descarcă-le din atașamentele provocării. parole.txt conține 100 d...

100 points 8 solves

Crypto Computer: This challenge connects with nc or SSH, which needs a terminal. Medium

Echo Chamber

A service encrypts AES-ECB( your_input || secret ) and hands the ciphertext back to you. ECB encrypts every 16-byte b...

100 points 2 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

RSA 9

The Mysterious Revelation As the adventurers continued their exploration of the Cryptkeeper's Manor, they stumbled...

100 points 4 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

RSA 8

The Final Confrontation After enduring countless trials, the adventurers finally reached the heart of the mansion, w...

100 points 4 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

RSA 7

The Cursed Mirror Within the darkest depths of the mansion, they came upon a cursed mirror. It revealed eight dist...

100 points 4 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

RSA 6

The Labyrinthine Basement Beneath the mansion, they descended into a labyrinthine basement filled with hidden pass...

100 points 3 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

RSA 5

The Enchanted Library In the mansion's vast library, the adventurers found an ancient tome containing eight chapte...

100 points 4 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

RSA 4

The Phantom Melodies As nightfall descended, a haunting melody began to play throughout the mansion. The adventure...

100 points 4 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

RSA 3

The Spectral Statues To decipher the next clue, they had to investigate the mansion's garden, where they discovere...

100 points 4 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

RSA 2

The Whispers of the Wind Upon entering the mansion, the adventurers were met with ghostly whispers that echoed thr...

100 points 6 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

RSA 1

The Haunting Invitation As the wind howled through the twisted trees, the adventurers stumbled upon an old, decrep...

100 points 5 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Medium

Operations

IAoGGw0oOBcnCB4OAAIVF1cbEF5TEQ== Flag format: LearnIT

150 points 3 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Easy

Decrypted

decrypted..?

100 points 6 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Medium

BitsAndBits

^.^

150 points 4 solves

Crypto Computer: You will analyse downloaded files, which usually needs a computer. Expert

AES CTF

ae97eca87b855f083a56d22d6592ed1ba7b3118f0ed15eb0adc8995793480b2de4b63fd79de9bf6e6056753e7e16 28

20 points 3 solves

Crypto Computer: This challenge connects with nc or SSH, which needs a terminal. Medium

Wheel of Fortune

Spin the wheel and guess the number! The formula is visible, but predicting 100 correct answers in a row requires mor...

150 points 5 solves

Crypto Computer: This challenge connects with nc or SSH, which needs a terminal. Medium

Predictable Randomness

Randomness is only as strong as the algorithm behind it.

150 points 2 solves