Recapping 13 Winning Projects from ETHGlobal Paris Hackathon: Voice Interaction, Privacy Protection, and Cross-Chain
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Recapping 13 Winning Projects from ETHGlobal Paris Hackathon: Voice Interaction, Privacy Protection, and Cross-Chain
This article reviews the 13 winning projects from the ETHGlobal Paris hackathon.
Navigating Web3 tides with focused insightsWritten by: ETHGlobal
Translated by: TechFlow
ZK Microphone
Generative AI and deepfake audio pose a significant threat to the information society as we know it. This revolutionary technology, due to the presence of malicious actors, will bring substantial negative impacts as society adapts to this new development.
It enables disinformation, mass-produced false narratives, and manipulated media, distorts information, influences national-level political strategies, and poses a serious threat to democracy—especially in light of upcoming presidential elections where many adversarial actors are poised to exploit this new technology for personal gain.
ZK Microphone has built a comprehensive solution to prevent such scenarios. Within a secure isolated environment, ZK Microphone stores a private key used for digital signing, which guarantees the hardware authenticity of recorded audio—ensuring that the audio was indeed captured on that specific hardware microphone.
However, this alone is insufficient—it means you cannot privately edit audio, severely limiting the usability of hardware-authenticated microphones. Imagine accidentally leaking sensitive information during recording, yet being unable to edit the audio without breaking the entire digital signature! This is highly impractical. Therefore, ZK Microphone developed SNARK-based audio editing software capable of applying a series of audio transformations, digitally proving that hardware-signed audio has been converted into edited audio—all while preserving privacy and signature integrity.
In other words, third parties can verify the following about any edited audio released using the ZK Microphone system:
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The edited audio originated from a genuine hardware microphone.
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The original audio before editing remains private; only the applied operations are known.
GLSwaps
GLSwaps leverages Uniswap by injecting smart contracts onto Uniswap, enabling users to access perpetual markets on-chain and engage in derivative trading via added leverage buttons and sliders.
TwitterCampaign
Twitter Campaigns is an AI-powered on-chain DAO tool for creating Twitter marketing campaigns that run on smart contracts, elevating DAO tools and social proof to a new level. The decentralized application (dApp) has two goals: enable DAOs or anyone to gain promotional social media posts through tokenized incentives, and attract more non-crypto experts into these incentives via FOMO and social proof. Since Twitter is one of the world’s most popular social networks, we leverage existing Twitter authentication and user accounts, layering crypto functionality on top. The dApp's user interface consists of three components: 1. Account summary, 2. Campaigns, 3. Reward logs.
TyphoonCashX
TyphoonCashX is an anonymous cross-chain bridge protocol leveraging zero-knowledge technology through a cross-chain mixer to create a privacy layer, extending the vision of the well-known Tornado Cash protocol. The protocol uses Sismo technology to generate off-chain group membership proofs for depositors, ensuring funds can be claimed on another chain after deposit. Additionally, it leverages the Hyperlane protocol to efficiently broadcast messages arriving on one chain to all other chains, preventing various attacks.
The protocol’s underlying architecture includes a source chain (with EnterNode) and a destination chain (with ExitNode), with users able to privately select from all available chains. Its main goal is to facilitate bridging ERC20 tokens from the source chain to a target blockchain while achieving anonymity and resistance against double-spend attacks.
Kinetex Light Clients
The Kinetex team believes Ethereum remains the flagship and leading network in the crypto space. However, due to rapid growth in activity and influx of new projects, network load has significantly increased. Scalability has become a major concern, and Layer 2 (L2) networks have emerged as one solution, though they lead to fragmented liquidity. As most protocols become multi-chain, fast, cost-effective, and secure liquidity transfer becomes crucial.
To address these challenges, cross-chain bridges offer solutions for transferring liquidity between Ethereum’s L1 and L2 networks. The Kinetex team has been integrating cross-chain bridges and decentralized exchanges (dexes) to support community liquidity movement. However, recent collapses of large bridges like MultiChain prompted the team to reevaluate the security and effectiveness of existing bridge solutions.
The Kinetex team’s proposed approach involves reimagining liquidity transfer. They suggest shifting control to a decentralized marketplace rather than relying on vulnerable centralized liquidity pools. In this market, users create swap orders, professional solvers take on the risk of managing swaps, and earn commissions. This approach fosters an honest and truly decentralized market, where solvers compete to serve users.
Kinetex Light Clients solve a critical challenge by enabling batched transaction processing. This method allows users and solvers to conduct peer-to-peer transactions directly, without waiting for or depending on validators. Doing so significantly optimizes gas costs. Furthermore, using zk (zero-knowledge) technology in batching further enhances gas efficiency.
To facilitate transferring blockchain state across networks, the Kinetex team employs multiple protocols for inter-chain communication. Leveraging several protocols simultaneously ensures maximum security.
Harpos
Harpos was driven by recognition of challenges present in other social networks, including bot interactions, unsolicited sales pitches, and connecting with individuals who don’t share genuine interests. By empowering users to directly connect with like-minded people based on their chosen criteria and verifying the authenticity of their connections, we aim to address these pain points.
In summary, Harpos offers clear advantages including “efficient networking,” “authenticity,” and “privacy.”
Bubbles
Bubbles is an innovative audio chat platform tailored specifically for on-chain communities, revolutionizing how users interact and communicate. This cutting-edge project integrates four key components to create a seamless and secure experience:
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Sign in with Ethereum: Users can easily connect via their Ethereum wallet, simplifying onboarding. By importing their Ethereum Name Service (ENS) and social profiles such as Farcaster, Lens, and XMTP, users maintain consistent online identity across the platform.
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Daily.co: Powered by Daily.co’s robust tools and infrastructure, Bubbles provides a smooth and immersive communication environment. Users can engage in real-time conversations, fostering community and collaboration.
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Airstack: Simplifying data integration, Airstack acts as a blockchain data indexer, aggregating information from various sources such as ERC20, ERC721, and ERC1155 tokens, POAPs, Web3 social data, and XMTP. This enables Bubbles to implement access requirements based on user holdings and credentials, ensuring token-gated rooms.
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Sismo: Prioritizing user privacy and security, Sismo serves as a sovereign identity aggregator and crypto-native single sign-on (SSO) solution. Using zero-knowledge proofs (ZKP), Bubbles can verify user membership in specific data groups without revealing their true identity.
Stake Garden
StakeGarden is a self-managed liquid staking portfolio that allows you to diversify investments and mitigate risks, ensuring your safety and control.
Cypher Deposit
Cypher Deposit introduces a revolutionary solution for private cryptocurrency withdrawals, addressing the growing demand for enhanced financial privacy in the crypto space.
Their platform prioritizes user confidentiality, offering individuals, businesses, and high-net-worth individuals a seamless and secure way to conduct anonymous transfers, protecting the privacy of their financial data and transaction details—users can withdraw their cryptocurrency without compromising anonymity.
At the core of its solution lies advanced ZKBOB (Zero-Knowledge Balance Oblivion) technology, ensuring transaction details remain private and offline. This guarantees users’ financial activities stay confidential, protected from third-party tracking and surveillance. By integrating liquidity pools via a software development kit (SDK), Cypher Deposit enables fast and direct deposits and withdrawals, further enhancing convenience and efficiency in the withdrawal process.
Cypher Deposit hosts its frontend on the IPFS protocol, embracing decentralization and offering users a transparent and trustworthy platform. Users retain full control over their financial assets, free from central authority oversight.
Bob the Solver
"Bob the Solver" is an innovative project designed as infrastructure for intent-based transactions (txs), integrable into wallets and decentralized applications (dapps). The project stems from an emerging paradigm shift in the account abstraction space, focusing on delegating the transaction creation process to third parties. Instead of specifying exact transactions, the emphasis is on executing user intent.
Essentially, an "intent" represents the desired outcome, whereas a "transaction" outlines the precise steps required to execute it. Consider a user intending to purchase an NFT on the Polygon network. The intent is simple, but the actual transaction may involve complex and time-consuming tasks such as token swaps, cross-chain bridging, and executing specific purchases—requiring deep blockchain expertise.
Recognizing that users typically have only intents—not detailed transaction knowledge—"Bob the Solver" aims to simplify the transaction process. The project successfully developed a "solver" that accepts user intents, automatically formulates appropriate transactions, and executes them on behalf of users.
This solver infrastructure not only improves user experience by streamlining transaction processes but also optimizes transaction efficiency, eliminating the need for users to manually construct complex blockchain transactions. By effectively outsourcing transaction creation and execution, "Bob the Solver" transforms how users interact with blockchain transactions, making the entire experience more intuitive and user-friendly.
VoiceSense
Driven by our belief in an inclusive Web3 future for everyone, VoiceSence aims to make Web3 more accessible by removing barriers that prevent people from transacting on blockchains. VoiceSence enables anyone who finds voice input more convenient than manual text entry to perform Web3 transactions.
VoiceSence’s objectives are:
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Enable visually impaired or reading-challenged users to use voice as an input mechanism for conducting Web3 transactions.
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Allow users to input commands in their native language without needing to write in unfamiliar languages.
The project logically runs AI models at the execution layer to convert voice input into text and map it to fields required for transaction creation. Then, VoiceSence establishes a wallet connection to create and sign transactions on-chain.
Community-bound
Community-bound tokens (CBTs) represent a potential new standard for tokens tightly linked to members (or sets of addresses) of a specific community, cryptographically defined—for example, via multisig wallets or ERC-721 membership.
Communities can decide what behaviors they value and how much reputation points to award. Ideally, these behaviors occur on-chain so CBTs can be automatically distributed, but they can also be off-chain, allowing communities to retroactively grant CBTs based on real-world activities. These tokens can then be used for merit-based governance, reputation systems, community credit scores for undercollateralized loans, or any creative use the community envisions.
On-chain Message Aggregator
Aggregating all Web3 messaging apps into S3nd, they provide a one-stop service for all Web3 messaging applications: simple single sign-on, human verification via Worldcoin, and native on-chain message support.
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