Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

187714f513f3c515ed7511d0c76063595cae3c722ef9b74a12af38b274fab6f28a77bf5064eb4219e163133160c314d58de1bcc6fc62a7918001caba47e0e64e

Ciphertext (hexencoded):

187714f513f3c515ed7511d0c7606359 5cae3c722ef9b74a12af38b274fab6f2 8a77bf5064eb4219e163133160c314d5 8de1bcc6fc62a7918001caba47e0e64e

Plaintext (hexencoded):

187714f513f3c515ed7511d0c7606359 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\x18w\x14\xf5\x13\xf3\xc5\x15\xedu\x11\xd0\xc7`cY {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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