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User Agent may want to restrict cross-origin transferSize/encodedBodySize/decodedBodySize visibility even with TAO #342

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achristensen07 opened this issue Aug 27, 2022 · 2 comments · Fixed by #369
Closed

User Agent may want to restrict cross-origin transferSize/encodedBodySize/decodedBodySize visibility even with TAO #342

achristensen07 opened this issue Aug 27, 2022 · 2 comments · Fixed by #369

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@achristensen07
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Doing so would prevent a side-channel to gather data even from origins that send TAO headers. Similar to w3c/server-timing#89 which proposes a similar restriction for Server Timing.
@yoavweiss
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This was discussed at TPAC, and there was agreement we can allow such UA liberties in the spec.

@achristensen07 - Are you interested in submitting a PR to that effect?

@achristensen07
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I can make a PR

achristensen07 added a commit to achristensen07/resource-timing that referenced this issue Jan 26, 2023
@achristensen07
Allow user agents to enforce cross-origin restrictions
ef7902e 
even with the presence of TAO header fields.  This resolves
w3c#342
@achristensen07 achristensen07 mentioned this issue Jan 26, 2023
Merged
achristensen07 added a commit to achristensen07/resource-timing that referenced this issue Jan 26, 2023
@achristensen07
Allow user agents to enforce cross-origin restrictions
01dafaf 
even with the presence of TAO header fields.  This resolves
w3c#342
yoavweiss pushed a commit that referenced this issue Mar 3, 2023
@achristensen07
Allow user agents to enforce cross-origin restrictions (#369)
99f12ef 
even with the presence of TAO header fields.  This resolves
#342
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Allow user agents to enforce cross-origin restrictions achristensen07/resource-timing
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@yoavweiss @achristensen07