Block cipher challenge

Level: CTR mode

Sorry, you're not an admin (need is_admin: true)



Ciphertext (hexencoded), for easy copy-paste

86cf1f5f15cca0b7122333bf4c2e84fec0d35a11165e5a610c987ab8adfb41904a9c17a9a84e1127c5b267938ad225e6c8f64b419846bcb4f9f83af149926bec

Ciphertext (hexencoded):

86cf1f5f15cca0b7122333bf4c2e84fe c0d35a11165e5a610c987ab8adfb4190 4a9c17a9a84e1127c5b267938ad225e6 c8f64b419846bcb4f9f83af149926bec

Plaintext (hexencoded):

86cf1f5f15cca0b7122333bf4c2e84fe 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\x86\xcf\x1f_\x15\xcc\xa0\xb7\x12#3\xbfL.\x84\xfe {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

{"username": "guest", "is_guest": true}