CHIPS (Cookies Having Independent Partitioned State)

[johannhof]

Request for position on an emerging web specification

• WebKittens who can provide input: @johnwilander @hober

Information about the spec

• Spec Title: CHIPS (Cookies Having Independent Partitioned State)
• GitHub repository: https://github.com/privacycg/CHIPS

Design reviews and vendor positions

• TAG Design Review: Cookies Having Independent Partitioned State (CHIPS) w3ctag/design-reviews#654
• Mozilla standards-positions issue: CHIPS (Cookies Having Independent Partitioned State) mozilla/standards-positions#678

Anything else we need to know

CHIPS is a proposal for a new cookie attribute, Partitioned. This attribute will indicate to user agents that these cross-site cookies should only be available in the same top-level context that the cookie was first set in.

CHIPS has been discussed in PrivacyCG and beyond for a while, and participants from other browsers including Safari (@johnwilander) have generally signaled support so far (with a few details to figure out), see privacycg/proposals#30.

[johnwilander]

Thanks for filing, Johann. The team is discussing, including CFNetwork.

[johannhof]

An additional note that we've updated the proposal to improve the worst-case memory overhead from partitioning, which was a major concern from WebKit as we understood it.