Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

e1b5fa3970e7a74e826792fe39cc33c61659b5117f4f1de366ca84be31cc9babeb7c53e8144c6c6d8b6629d2a204dd37065c260042e5a532603852abacf4bf28

Ciphertext (hexencoded):

e1b5fa3970e7a74e826792fe39cc33c6 1659b5117f4f1de366ca84be31cc9bab eb7c53e8144c6c6d8b6629d2a204dd37 065c260042e5a532603852abacf4bf28

Plaintext (hexencoded):

e1b5fa3970e7a74e826792fe39cc33c6 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\xe1\xb5\xfa9p\xe7\xa7N\x82g\x92\xfe9\xcc3\xc6 {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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