Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

2248f5e8bf2ec91161371192bf7ed57efc6120046601c11632f83ca89bf64ba9853ca5c13581ba6f77e1eeccb74e69bf4e85a3bedc150d455d36fa07fe5fb88e

Ciphertext (hexencoded):

2248f5e8bf2ec91161371192bf7ed57e fc6120046601c11632f83ca89bf64ba9 853ca5c13581ba6f77e1eeccb74e69bf 4e85a3bedc150d455d36fa07fe5fb88e

Plaintext (hexencoded):

2248f5e8bf2ec91161371192bf7ed57e 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

"H\xf5\xe8\xbf.\xc9\x11a7\x11\x92\xbf~\xd5~ {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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