Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

6e7e1786099750ecb269386e262d3eade598444ba19057f27010ac655f5100fbfe54beab62832ab2369a4f857b82fe8000540eb605c840dbbad72ca965cabf71

Ciphertext (hexencoded):

6e7e1786099750ecb269386e262d3ead e598444ba19057f27010ac655f5100fb fe54beab62832ab2369a4f857b82fe80 00540eb605c840dbbad72ca965cabf71

Plaintext (hexencoded):

6e7e1786099750ecb269386e262d3ead 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

n~\x17\x86\t\x97P\xec\xb2i8n&->\xad {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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