Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

f6bb6fc3dfbaa40700873aa4e155ed2b71c8852acca6662385328efd596a88bf974eea777911104a06cce7ba09473ec2d6d60f9ce9eb134d43443df11c52d3bc

Ciphertext (hexencoded):

f6bb6fc3dfbaa40700873aa4e155ed2b 71c8852acca6662385328efd596a88bf 974eea777911104a06cce7ba09473ec2 d6d60f9ce9eb134d43443df11c52d3bc

Plaintext (hexencoded):

f6bb6fc3dfbaa40700873aa4e155ed2b 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\xf6\xbbo\xc3\xdf\xba\xa4\x07\x00\x87:\xa4\xe1U\xed+ {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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