Block cipher challenge

Level: CBC mode

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



Ciphertext (hexencoded), for easy copy-paste

d7d700ea90134c28586f9c14e98923fc6d7f4c98abed5d24671cef2833046a9d0e37541b9034befe5a31bcf3a34350919562978af9b98b385de539aea3506200

Ciphertext (hexencoded):

d7d700ea90134c28586f9c14e98923fc 6d7f4c98abed5d24671cef2833046a9d 0e37541b9034befe5a31bcf3a3435091 9562978af9b98b385de539aea3506200

Plaintext (hexencoded):

d7d700ea90134c28586f9c14e98923fc 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\xd7\xd7\x00\xea\x90\x13L(Xo\x9c\x14\xe9\x89#\xfc {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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