Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

7b10e550270996c85a4481af6540353e97b3fb1b56cf3b37ccab52c8942874d50b71ad31a10a0314fabb73a477412ff02362da64965a723124c8bdee8fdedaff

Ciphertext (hexencoded):

7b10e550270996c85a4481af6540353e 97b3fb1b56cf3b37ccab52c8942874d5 0b71ad31a10a0314fabb73a477412ff0 2362da64965a723124c8bdee8fdedaff

Plaintext (hexencoded):

7b10e550270996c85a4481af6540353e 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

{\x10\xe5P\'\t\x96\xc8ZD\x81\xafe@5> {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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