Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

947d3aec7079a1b0ed5ae80820b78a80a4ebb828e66790401b1958430e73144a52a8e8d0e47d28bf3cd52c60be4ca562cc4e6e3300d8015a7e783c0f0f0ace37

Ciphertext (hexencoded):

947d3aec7079a1b0ed5ae80820b78a80 a4ebb828e66790401b1958430e73144a 52a8e8d0e47d28bf3cd52c60be4ca562 cc4e6e3300d8015a7e783c0f0f0ace37

Plaintext (hexencoded):

947d3aec7079a1b0ed5ae80820b78a80 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\x94}:\xecpy\xa1\xb0\xedZ\xe8\x08 \xb7\x8a\x80 {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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