Wotcher TAG!

I'm requesting a TAG review of CHIPS.

Given that browsers plan on deprecating or already have deprecated unpartitioned third-party cookies, we want to give developers the ability to use cookies in cross-site contexts that are partitioned by top-level site to meet cookie use cases that are not cross-site tracking related (e.g. SaaS embeds, headless CMS, sandbox domains, etc.). In order to do so, we introduce a mechanism to opt-in to having their third-party cookies partitioned by top-level site using a new cookie attribute, Partitioned.

• Explainer¹ (minimally containing user needs and example code): https://github.com/privacycg/CHIPS
• Specification URL: https://github.com/DCtheTall/CHIPS-spec
• Tests: https://github.com/web-platform-tests/wpt/tree/master/cookies/partitioned-cookies
• User research: N/A
• Security and Privacy self-review²: https://github.com/privacycg/CHIPS/blob/main/TAG-S%26P-questionnaire.md
• GitHub repo (if you prefer feedback filed there): https://github.com/privacycg/CHIPS/issues/
• Primary contacts (and their relationship to the specification):
  • Dylan Cutler (DCtheTall), Google Chrome
  • Kaustubha Govind (krgovind) Google Chrome
• Organization(s)/project(s) driving the specification: Google / Privacy Sandbox
• Key pieces of existing multi-stakeholder review or discussion of this specification:
  • https://github.com/privacycg/CHIPS/issues/
  • https://github.com/w3ctag/design-reviews/issues/654
• External status/issue trackers for this specification (publicly visible, e.g. Chrome Status): https://chromestatus.com/feature/5179189105786880

Further details:

• I have reviewed the TAG's Web Platform Design Principles
• Relevant time constraints or deadlines: N/A
• The group where the work on this specification is currently being done: Google / Privacy Sandbox
• The group where standardization of this work is intended to be done (if current group is a community group or other incubation venue): PrivacyCG
• Major unresolved issues with or opposition to this specification: N/A
• This work is being funded by: Google

You should also know that...

Early review of CHIPS concluded that CHIPS was privacy positive.

We'd prefer the TAG provide feedback as (please delete all but the desired option):

🐛 open issues in our GitHub repo for each point of feedback