Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

767ed4306964906d255e240ec88c205f3829eda395b94b8145135f8cadda2de52ffb7dc38f738aec856a086327733834b52a056798e4d4c81fcad4c400c21419

Ciphertext (hexencoded):

767ed4306964906d255e240ec88c205f 3829eda395b94b8145135f8cadda2de5 2ffb7dc38f738aec856a086327733834 b52a056798e4d4c81fcad4c400c21419

Plaintext (hexencoded):

767ed4306964906d255e240ec88c205f 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

v~\xd40id\x90m%^$\x0e\xc8\x8c _ {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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