The secret key for user cookie encryption can have strong consistency and does not need to read the library. Please find a method (to store user information when the user logs in, a secret key is needed. Please design a method for this secret key)
给我你的怀抱2017-05-16 13:10:55
Then this key can only be spliced by getting timestamps and the like
世界只因有你2017-05-16 13:10:55
This is what I do: device number (if there is a client device number) + user account + timestamp + custom characters (to further prevent guessing) to concatenate it. You can also combine it with the md5 algorithm to add a password to the whole