The background here is from keygrip which Express.js uses for it's cookie signing.
The idea is that the end user can rotate their keys, adding a new one which signs all new cookies while still allowing older cookies to be verified for a (probably lengthy) time.
The background here is from keygrip which Express.js uses for it's cookie signing.
The idea is that the end user can rotate their keys, adding a new one which signs all new cookies while still allowing older cookies to be verified for a (probably lengthy) time.