IPPE ⇒ Payload-only hiding

IPPE implies Payload-only hiding.

Statement

Migrated verbatim from inner-product-predicate-encryption § Payload-only hiding:

Dropping the attribute-hiding requirement yields a simpler payload-hiding variant: the adversary commits to a single $x^{\ast }$ and submits two messages, with the constraint that no queried $v$ satisfies $⟨v,x^{\ast }⟩=0(\mathrm{mod}p)$.

Notes

source: folklore: the claim carried no citation on the page it was migrated from, and none was invented.

class: unstated: no citing page says which notion of reduction is meant. Recording a class the wiki does not state would add a claim.

Recorded during migration and not fixed — these are claims about the source text, not changes to it:

• Variation section: attribute-hiding ⇒ payload-hiding is implicit, never asserted, uncited.
• No slug for the payload-hiding variant.