Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

5a37cc33a6ca242d8f394e3858d2da862f838a5b6f8ce0cf500bcaf26e605eb2954b05de949dc3d03d66ea75604ef57dd91b820b46fd89b30dd25c39143c030d

Ciphertext (hexencoded):

5a37cc33a6ca242d8f394e3858d2da86 2f838a5b6f8ce0cf500bcaf26e605eb2 954b05de949dc3d03d66ea75604ef57d d91b820b46fd89b30dd25c39143c030d

Plaintext (hexencoded):

5a37cc33a6ca242d8f394e3858d2da86 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

Z7\xcc3\xa6\xca$-\x8f9N8X\xd2\xda\x86 {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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