Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

bd56c3cb540d4f616c3fcc305fca2ac24ee84cf7bee55928ab428d71ef322a459d12d3a5bd8977dd5e362ac03e779807935d16789d2059486967e9d05a05b23b

Ciphertext (hexencoded):

bd56c3cb540d4f616c3fcc305fca2ac2 4ee84cf7bee55928ab428d71ef322a45 9d12d3a5bd8977dd5e362ac03e779807 935d16789d2059486967e9d05a05b23b

Plaintext (hexencoded):

bd56c3cb540d4f616c3fcc305fca2ac2 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\xbdV\xc3\xcbT\rOal?\xcc0_\xca*\xc2 {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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