How to decrypt Private Cookies value？

[779505388]

add_private encrypts the content,how to decrypt ?

[wezm]

The API for retrieving, adding, and removing private cookies is identical except that most methods are suffixed with _private. These methods are: get_private, [get_pending], add_private, and remove_private.

— https://rocket.rs/v0.5-rc/guide/requests/#private-cookies

[779505388]

The API for retrieving, adding, and removing private cookies is identical except that most methods are suffixed with _private. These methods are: get_private, [get_pending], add_private, and remove_private.

— https://rocket.rs/v0.5-rc/guide/requests/#private-cookies

I print the Cookie and I find the Value