
Input | Output
@InputOutputHK
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We are a research and development company committed to using the peer-to-peer innovations of blockchain to build accessible financial services for all.
Wyoming, USA
Joined February 2015
4/ Users need decentralized identities that preserve privacy and are Sybil-resilient, but without the vulnerabilities of storing information. SyRA: Sybil-Resilient Anonymous Signatures with Applications to Decentralized Identity studies how SyRA signatures and our new
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3/ Today's complex and vulnerable rollup systems can be at risk of major hacks. Towards a Formal Foundation for Blockchain ZK Rollups creates a formal security model for blockchain ZK rollups using Alloy properties, to enable safe scaling solutions. Read the paper at
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2/ Centralized sequencers can alter the order of transactions, causing the failure of L2 rollups. A Secure Sequencer and Data Availability Committee for Rollups proposes a new protocol for a completely decentralized sequencer and data availability committee. Read the paper at
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1/ Want to learn how to build more robust & user-centric decentralized systems? We have 3 papers on infrastructure and identity security to be presented next week at the 32nd ACM Conference on Computer and Communications Security. Devs, researchers, and auditors, read on for
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EDUCATION: The education team is gathering feedback from two recent events: the Cardano Days at the University of Wyoming and their attendance at @token2049 in Singapore. This feedback will help shape future educational initiatives.
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VOLTAIRE: The application deadline for candidates in the @IntersectMBO committee elections has been extended to October 24 at 12 PM UTC. The voting period will run from October 27 to November 7. This extension provides a greater opportunity for community members to get involved
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SCALING: The Mithril team is focused on integrating the Haskell DMQ node with Mithril nodes and has now entered the first phase of decentralizing configuration parameters. Also, the Input | Output Research team invites everyone to an upcoming Cardano R&D session on Interchains on
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SMART CONTRACT: The Plutus team has completed the implementation of CIP-0153, which introduces the `Value` built-in type. With the final costing underway, all features for the upcoming intra-era hard fork are now complete, marking a significant step toward improving Plutus
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CORE TECHNOLOGY: The ledger team has made solid progress on CIP-112, which introduces a new type of native script that enforces the execution of a Plutus script during transaction validation. This feature strengthens on-chain logic and improves script composability.
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The latest #EssentialCardano development update is here. Catch up on this week’s progress across core technology, wallets and services, smart contracts, and scaling and governance. https://t.co/aXltmczk9U
essentialcardano.io
ECOSYSTEM UPDATES The information in this section is based on publicly available sources and is provided for informational purposes only.…
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The Unshielded Podcast is back, and this episode is all about the creators shaping Web3. 🎙 Host @jschobes sits down w/ @dapp_central & @rupertwhitehead from @InputOutputHK to unpack: 👉 Turning complex tech into clear stories 👉 The balance between education & entertainment in
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🙋♀️Ever wondered how blockchain ecosystems can maintain bridge security at scale? Find out at the Cardano R&D Interchains Session with @_MrHunt_, @MPhysics3, @0xmauricio, and Karmel Elshinnawi, I | O Partner Chains on Oct 14 at 3pm UTC. 👉Reserve your spot now at
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The second paper analyses token price (in)stability in proof-of-stake blockchain systems, including how external shocks can destabilize single-token models. Quantitative rewarding can react to those shocks, which is especially relevant for two-token architectures, like
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The first paper explores alternative reward sharing schemes for Cardano, using a game-theoretic model of pool formation focusing on the Shapley value for sharing rewards. This model will enable designers of proof-of stake protocols to analyze incentive structures and rewards
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Want to keep up-to-date on the latest blockchain research? We’re excited to announce that Input | Output is one of the sponsors of Advances in Financial Technologies (AFT) this week at Carnegie Mellon University in Pittsburgh, PA. The IO Research team is also presenting two
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Leios is more than a technical upgrade; it's a new model for globally coordinated blockchain development. Dive deeper into the tech and the innovative 'follow the sun' model in the full article. 👇 https://t.co/yfBDphaTtN 🧵7/7
essentialcardano.io
The Cardano ecosystem stands on the threshold of a transformative upgrade that could redefine what's possible on a proof-of-stake blockchain:…
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The project is advancing, with the Leios Cardano Improvement Proposal (CIP) published in August 2025 after community review. Handover to the IO Engineering team is imminent, and a public dashboard was recently demoed at @token2049. 🔗CIP: https://t.co/m0PyBPDHQG 🔗TOKEN2049
github.com
(Rendered Version)
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Benefits of Leios extend across the ecosystem: 👉 SPOs: can handle higher transaction volumes with manageable infrastructure upgrades. 👉 Developers: face less friction, enabling more powerful DApps. 👉 Users: experience quicker transaction confirmations. 🧵5/7
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The 'follow the sun' model enables continuous progress. Teams hand off work across time zones, allowing for parallel research, prototyping, and implementation, which compresses development timelines. 🧵4/7
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The Leios proposal targets a throughput increase of 30 to 65 times compared to the current Ouroboros Praos mechanism. It uses standard blocks alongside larger, secondary blocks to include more transactions, which are validated by a committee. 🧵3/7
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