[drafted](https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-cookie-alone-01)
to deprecate modification of 'secure' cookies from non-secure origins. Both
of these drafts have been incorporated into a proposal to
- [replace](https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-rfc6265bis-02)
+ [replace](https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-rfc6265bis-11)
RFC6265. Cookie prefixes and secure cookie modification protection has been
implemented by curl.