Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

8b5a5dd9b78fe8152b650b492adee7d0cedbbd926e5b5e92e85f4668e093973ec8283e622efef78f2b5026c82cc90b66b4c191c593ab48cfc3858616514ebf7b

Ciphertext (hexencoded):

8b5a5dd9b78fe8152b650b492adee7d0 cedbbd926e5b5e92e85f4668e093973e c8283e622efef78f2b5026c82cc90b66 b4c191c593ab48cfc3858616514ebf7b

Plaintext (hexencoded):

8b5a5dd9b78fe8152b650b492adee7d0 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\x8bZ]\xd9\xb7\x8f\xe8\x15+e\x0bI*\xde\xe7\xd0 {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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