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redpwnCTF 2021

Note : A JOURNEY TO GAIN KNOWLEDGE

crypto/scissor

import random

key = random.randint(0, 25)
alphabet = 'abcdefghijklmnopqrstuvwxyz'
shifted = alphabet[key:] + alphabet[:key]
dictionary = dict(zip(alphabet, shifted))

print(''.join([
    dictionary[c]
    if c in dictionary
    else c
    for c in input()
]))

egddagzp_ftue_rxms_iuft_rxms_radymf

Certainly, it's Caesar cipher

surround_this_flag_with_flag_format

crypto/baby

n: 228430203128652625114739053365339856393 e: 65537 c: 126721104148692049427127809839057445790

RSA? sure :v

flag{68ab82df34}

crypto/round-the-bases

base85 - > base64 - > hex -> decimal - > octal - > binary

flag{w0w_th4t_w4s_4ll_wr4pp3d_up}

Thanks for reading. Have a good day <3

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