Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

6f9e066f63bfa6f19e0e9b321c24ba06820a25009a9eb66153e5056703a0a12477e2ab77432a61b9ef474141ede8a225a68e08e9722a5415a9210985d52a486f

Ciphertext (hexencoded):

6f9e066f63bfa6f19e0e9b321c24ba06 820a25009a9eb66153e5056703a0a124 77e2ab77432a61b9ef474141ede8a225 a68e08e9722a5415a9210985d52a486f

Plaintext (hexencoded):

6f9e066f63bfa6f19e0e9b321c24ba06 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

o\x9e\x06oc\xbf\xa6\xf1\x9e\x0e\x9b2\x1c$\xba\x06 {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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