Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

4f0ef1dc65a45522282f41429798a7fa4729b8ffd633ac8c9bbb4289de06fd83f6e8932621e886dce30f6b9ddef078442d8677cc5c48ce7ca2753cf7222b57b3

Ciphertext (hexencoded):

4f0ef1dc65a45522282f41429798a7fa 4729b8ffd633ac8c9bbb4289de06fd83 f6e8932621e886dce30f6b9ddef07844 2d8677cc5c48ce7ca2753cf7222b57b3

Plaintext (hexencoded):

4f0ef1dc65a45522282f41429798a7fa 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

O\x0e\xf1\xdce\xa4U"(/AB\x97\x98\xa7\xfa {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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