Block cipher challenge

Level: CTR mode

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Ciphertext (hexencoded), for easy copy-paste

e3ed660429bce5f0de2a20d798c74f6573b873b1b462097e1778e56c2020d3019940739ab05f9bae45e1757eaa99b93c06384c2f967c7a64a2acb989ab993bce

Ciphertext (hexencoded):

e3ed660429bce5f0de2a20d798c74f65 73b873b1b462097e1778e56c2020d301 9940739ab05f9bae45e1757eaa99b93c 06384c2f967c7a64a2acb989ab993bce

Plaintext (hexencoded):

e3ed660429bce5f0de2a20d798c74f65 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\xe3\xedf\x04)\xbc\xe5\xf0\xde* \xd7\x98\xc7Oe {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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