Skip to content

Spec the multi-epoch unoptimization #211

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 1 commit into from
Closed

Spec the multi-epoch unoptimization #211

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
28 changes: 21 additions & 7 deletions api.bs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1031,7 +1031,8 @@ To <dfn>deduct privacy budget</dfn>
given a [=privacy budget key=] |key|,
[[WEBIDL#idl-double|double]] |epsilon|,
integer |sensitivity|,
and integer |globalSensitivity|:
integer |globalSensitivity|,
and integer |epochCount|:

1. If the [=privacy budget store=] does not [=map/contain=] |key|, [=map/set=]
its value of |key| to be a [=user agent=]-defined value,
Expand All @@ -1045,7 +1046,9 @@ and integer |globalSensitivity|:
1. Let |currentValue| be the result of [=map/get|getting the value=] of |key|
in the [=privacy budget store=].

1. Let |deductionFp| be |epsilon| * |sensitivity| / |globalSensitivity|.
1. If |epochCount| is 1,
let |deductionFp| be |epsilon| * |sensitivity| / |globalSensitivity|.
Otherwise, let |deductionFp| be |epsilon|.

1. If |deductionFp| is negative or greater than 4294,
[=map/set|set=] the value of |key| in the [=privacy budget store=] to 0
Expand Down Expand Up @@ -1434,6 +1437,20 @@ To <dfn>do attribution and fill a histogram</dfn>, given
1. Let |startEpoch| be the result of [=get the starting epoch for attribution=]
with |topLevelSite|.

1. Let |epochCount| be 0.

1. For each |epoch| from |startEpoch| to |currentEpoch|, inclusive:

1. Let |impressions| be the result of invoking [=common matching logic=]
with |options|, |topLevelSite|, |epoch|, and |now|.

1. If |impressions| [=set/is empty|is not empty=],
add 1 to |epochCount|.

1. If |epochCount| is 0,
return the result of invoking [=create an all-zero histogram=]
with |options|' [=validated conversion options/histogram size=].

1. For each |epoch| from |startEpoch| to |currentEpoch|, inclusive:

1. Let |impressions| be the result of invoking [=common matching logic=]
Expand All @@ -1446,14 +1463,11 @@ To <dfn>do attribution and fill a histogram</dfn>, given
1. Let |budgetOk| be the result of [=deduct privacy budget=]
with |key|, |options|' [=validated conversion options/epsilon=],
|options|' [=validated conversion options/value=],
and |options|'s [=validated conversion options/max value=].
|options|'s [=validated conversion options/max value=],
and |epochCount|.

1. If |budgetOk| is true, [=set/extend=] |matchedImpressions| with |impressions|.

1. If |matchedImpressions| [=set/is empty=], return the result of invoking
[=create an all-zero histogram=] with
|options|' [=validated conversion options/histogram size=].

1. Switch on |options|' [=validated conversion options/logic=]:
<dl class="switch">
: <a enum-value for=AttributionLogic>"last-touch"</a>
Expand Down
Loading