Ouroboros: A Provably Secure Proof-of-Stake Blockchain Protocol

Hello Cardano community,

This time we’d like to draw your attention to a foundational research paper in our community - “Ouroboros: A Provably Secure Proof-of-Stake Blockchain Protocol”. This insightful work has been a significant contributor to the development of Cardano’s Proof of Stake mechanism over the years.

Authored by a team of globally recognized researchers, the paper presents a unique take on the Proof of Stake protocol, named Ouroboros. It is an innovative, efficient, and secure PoS protocol, proving its security in a rigorous cryptographic model.

We present “Ouroboros,” the first blockchain protocol based on proof of stake with rigorous security guarantees. We establish security properties for the protocol comparable to
those achieved by the bitcoin blockchain protocol. As the protocol provides a “proof of stake”
blockchain discipline, it offers qualitative efficiency advantages over blockchains based on proof
of physical resources (e.g., proof of work). We also present a novel reward mechanism for incentivizing proof of stake protocols and we prove that, given this mechanism, honest behavior
is an approximate Nash equilibrium, thus neutralizing attacks such as selfish mining. We also
present initial evidence of the practicality of our protocol in real world settings by providing
experimental results on transaction confirmation and processing.

We strongly encourage everyone to delve into this fascinating paper to deepen your understanding of the principles that guide Cardano’s Proof of Stake mechanism. Let this be the start of rich and productive conversations.

You can access the research paper here: Ouroboros: A Provably Secure Proof-of-Stake Blockchain Protocol

Happy Reading!

Your Cardano Community Team