[Django] how to encrypt and decrypt

from itsdangerous import TimedJSONWebSignatureSerializer as Serializer
serializer = Serializer('secretkey', 3600)
info = {'confirm':1}
res = serializer.dumps(info)
res
Out[7]: b'eyJhbGciOiJIUzUxMiIsImlhdCI6MTYxMTIxODczOCwiZXhwIjoxNjExMjIyMzM4fQ.eyJjb25maXJtIjoxfQ.MaR3FpbfIhqSy-EW7rqHJ4aWK_7bd9B7r2JoZF92eOrhceesT69xgzGPE5Yj7KRL4pRhggHHx8ASfA5oNRjTiQ'
serializer.loads(res)
Out[8]: {'confirm': 1}
serializer = Serializer('secretkey', 5)
info = {'confirm': 2}
res = serializer.dumps(info)
res
Out[12]: b'eyJhbGciOiJIUzUxMiIsImlhdCI6MTYxMTIxOTE1NiwiZXhwIjoxNjExMjE5MTYxfQ.eyJjb25maXJtIjoyfQ.91FS25oqe-PX6jU3xbZgSRHYbCHavjiaoqcQVl9WjMbyj26Aki2XznpH345b8Hj9JqK0i2Hfe8jnsVirh__SUQ'
serializer.load(res)
serializer.loads(res)
Traceback (most recent call last):
xxx
date_signed=self.get_issue_date(header),
itsdangerous.exc.SignatureExpired: Signature expired