# Ittai Abraham et al. - Provable Broadcast (Highlights)  ## Metadata **Review**:: [readwise.io](https://readwise.io/bookreview/57692464) **Source**:: #from/readwise #from/reader **Zettel**:: #zettel/fleeting **Status**:: #x **Authors**:: [[Ittai Abraham]], [[Alexander Spiegelman]] **Full Title**:: Provable Broadcast **Category**:: #articles #readwise/articles **Category Icon**:: 📰 **URL**:: [decentralizedthoughts.github.io](https://decentralizedthoughts.github.io/2022-09-10-provable-broadcast/) **Host**:: [[decentralizedthoughts.github.io]] **Highlighted**:: [[2026-01-19]] **Created**:: [[2026-01-19]] ## Highlights - **Locked Broadcast**: by running *two* consecutive PBs, we get a two round-trip protocol. This protocol additionally provides a *Unique-Lock-Availability* property: a *delivery-certificate* is a proof that $n−2f$ honest parties received a *lock-certificate* for this value, and no other value can have a *lock-certificate*. ([View Highlight](https://read.readwise.io/read/01kf9s3cbxsmj53fcezeycn8td)) ^979248266