You say that as if cookies haven't been a standardized and widely used data structure (key-value store) for decades.
Re:How to Use JSON Web Tokens
by johncolanduoni on Wednesday January 02, 2019 @03:59PM
(#18810133)
No, they say it as if cookies don’t have a built in authentication or encryption method (when the client is untrusted).
My point was that allowing 'None' was/is a flaw. If you want to shuttle bits of data about in an unsigned/unencrypted/insecure way, that's what raw cookies are for.
Now, as cookies are buckets to dump data, there is of course nothing to stop you encrypting, signing and doing all sorts of things to cookies.
the benefit is the portability that comes from a standardized and widely used data structure.