Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

d2e2e5f16c3d00f5c8d890de5d431a36f6695e2171d89d7641d82d22ec5edc470faacdc1f04d434aef0a010cd207cbabb0140da7f3f0fd406622e031d993016b

Ciphertext (hexencoded):

d2e2e5f16c3d00f5c8d890de5d431a36 f6695e2171d89d7641d82d22ec5edc47 0faacdc1f04d434aef0a010cd207cbab b0140da7f3f0fd406622e031d993016b

Plaintext (hexencoded):

d2e2e5f16c3d00f5c8d890de5d431a36 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\xd2\xe2\xe5\xf1l=\x00\xf5\xc8\xd8\x90\xde]C\x1a6 {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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