Name : Atbash

Category : Cryptology

Level : Easy (5 pts)

Author : VirtualSamurai

Date : 2020-01-20 16:44:41

Description :

From this file containing a mysterious message, you will have to find the flag of the challenge which will be in UPPER case.

Rated : 5 / 10

🩸 First Blood : Mika

Name : Cryptogram

Category : Cryptology

Level : Medium (15 pts)

Author : 0wnes1s

Date : 2020-06-06 18:09:33

Description : 'Ben', a DGSE agent, goes after his colleague 'Will'. They formed a team, code name 'doubleZero'. Will was in charge of deciphering a mysterious message found on an island. Having no more contact with Will, Ben decided to go to the HQ where Will was hiding. He found a mysterious cryptogram with some notes from Will. Flag format: `flag{...}`

Rated : 6 / 10

🩸 First Blood : cKw

Name : NetBIOS

Category : Cryptology

Level : Medium (15 pts)

Author : 0x66

Date : 2020-06-07 22:31:21

Description : Votre collègue a intercepté une chaine de caractères illisible, A vous d'essayer de la lire, la seule info qu'il a c'est qu'elle n'est pas standardisée

Rated : 5 / 10

🩸 First Blood : 0wnes1s

Name : CloudFlare

Category : Cryptology

Level : Medium (15 pts)

Author : 0wnes1s

Date : 2020-06-08 15:21:18

Description : One of your contacts sends you an obfuscated message. All he knows is that the original message contains 30 characters. It's up to you to find the algo and you to decipher it.

Rated : 7 / 10

🩸 First Blood : croucroute

Name : Caesar X ASCII

Category : Cryptology

Level : Easy (5 pts)

Author : 0wnes1s

Date : 2020-06-15 19:08:39

Description : A person has encrypted a message with caesar encryption, but it's not just the letters of the alphabet.

Rated : 6 / 10

🩸 First Blood : croucroute

Name : atn

Category : Cryptology

Level : Easy (5 pts)

Author : Katjushai

Date : 2020-07-01 21:56:32

Description : An image was found... But we do not know what is hidden in it... Flag format: `BS{...}`

Rated : 4 / 10

🩸 First Blood : Azing

Name : Cryptogram_2

Category : Cryptology

Level : Hard (30 pts)

Author : 0wnes1s

Date : 2020-07-06 07:18:27

Description : One of our agents discovered this in a hideout during his scouting mission. He has no idea what this mysterious letter is about, but he has heard some people talk about 'code'. We sent experts to the field to find out more. We are sending you the pictures taken by our agent anyway. You might be able to decipher this message.

Rated : 7 / 10

🩸 First Blood : croucroute

Name : Alternance

Category : Cryptology

Level : Easy (5 pts)

Author : look

Date : 2020-07-21 17:51:15

Description : One alternates then alternates and so on.

Rated : 5 / 10

🩸 First Blood : croucroute

Name : RSA

Category : Cryptology

Level : Medium (15 pts)

Author : look

Date : 2020-07-26 10:08:05

Description : Decrypt this RSA

Rated : 3 / 10

🩸 First Blood : 0wnes1s

Name : XOR

Category : Cryptology

Level : Medium (15 pts)

Author : look

Date : 2021-01-08 18:53:27

Description : This is an encrypted image. Try to decrypt it.

Rated : 6 / 10

🩸 First Blood : 0wnes1s

Name : Punchcard

Category : Cryptology

Level : Medium (15 pts)

Author : iwa

Date : 2021-01-11 11:56:07

Description : Decode this punchcard Flag format: bs{FLAG}

Rated : 6 / 10

🩸 First Blood : Bonzi

Name : DNA

Category : Cryptology

Level : Easy (5 pts)

Author : D0pp3lgang3r

Date : 2022-05-21 02:34:05

Description : We BASE our security on DNA cipher...

Rated : 7 / 10

🩸 First Blood : 0wnes1s

Name : TryHard

Category : Cryptology

Level : Easy (5 pts)

Author : Ant_ONE

Date : 2022-06-14 00:14:39

Description : Again and again and again...

Rated : 7 / 10

🩸 First Blood : D0pp3lgang3r