13
Cryptography can be easy, do you know what ROT13 is? cvpbPGS{abg_gbb_onq_bs_n_ceboyrz}
The same as Mod 26 - check that writeup!
from string import ascii_lowercase, ascii_uppercase
enc_flag = r"cvpbPGS{abg_gbb_onq_bs_n_ceboyrz}"
flag = ""
for c in enc_flag:
if c in ascii_lowercase:
flag += ascii_lowercase[(ascii_lowercase.index(c) + 13) % 26]
elif c in ascii_uppercase:
flag += ascii_uppercase[(ascii_uppercase.index(c) + 13) % 26]
else:
flag += c
print(flag)
# picoCTF{not_too_bad_of_a_problem}
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