Block cipher challenge

Level: CTR mode

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



Ciphertext (hexencoded), for easy copy-paste

44ae3878af2e6048b828d0a3e564a9378f7affcdfb7bf66d294f2c8f5664ff540170b85996f07d6fd77d0257737bc85975f4035b251b234646e506e12d421976

Ciphertext (hexencoded):

44ae3878af2e6048b828d0a3e564a937 8f7affcdfb7bf66d294f2c8f5664ff54 0170b85996f07d6fd77d0257737bc859 75f4035b251b234646e506e12d421976

Plaintext (hexencoded):

44ae3878af2e6048b828d0a3e564a937 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

D\xae8x\xaf.`H\xb8(\xd0\xa3\xe5d\xa97 {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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