# Project lead for the CloudFlare-RLN project, Privacy and Scaling Explorations Research Group Research and development · Fully Remote, RM ## About the Privacy and Scaling Explorations Research Group We are a cutting-edge technological research group exploring practical applications for Zero-Knowledge Proofs and Scaling solutions, in partnership with the Ethereum Foundation. Our mission is to build the cryptographic primitives that will form the bedrock of a rich and vibrant ecosystem of decentralized applications (dapps), built on Ethereum. We do this through pure research projects, by building proofs of concept, and by facilitating the integration of technological primitives into decentralized applications. ## Your mission We've been working on several ideas, as well as multiple different libraries for the [RLN ZK construct](https://medium.com/privacy-scaling-explorations/rate-limiting-nullifier-a-spam-protection-mechanism-for-anonymous-environments-bbe4006a57d). Our goal is to make the broader community more aware of the construct and the possibilities enabled by it, as well as develop real-life products which use the RLN construct. [The CloudFlare-like rate limiting using RLN and InterRep](https://ethresear.ch/t/decentralised-cloudflare-using-rln-and-rich-user-identities/10774) is currently in Proof-of-Concept stage. We've made the core architecture and user interaction decisions, and also created a prototype which demonstrates the concepts: https://github.com/bdim1/rln-interrep-cloudflare. The network design is not set in place, and we expect it to be changed so that the rate limiting works on a lower level of the network stack. Your mission will involve researching and developing an optimal network architecture for the Rate Limiting product. It also involves taking the lead of the product and bringing it to production ready state. ## Core responsibilities **Research and specify a network architecture for the product** - Reserach the most optimal network architecture for the Rate-limiting project - Write a formal specification about the product - system architecture, network architecture, interactions, tools to be used, etc. **Develop the product and bring it to production ready state** - Work alone or with a team on developing the product based on the previously defined specification - Optimize the product and make it production ready, with the main goal of reliability and supporting a large userbase without any performance degradations ## Required Skills and Experience - Experience in network design and system design - Experience in working with networking/sysadmin/devops tools - Backend development experience and profficieny in a high level programming language - Strong communication and documentation skills - Experience working closely with other developers and researchers ## Bonus Skills - Knowledge and experience with ZK concepts and constructs - Ethereum and web3 knowledge and experience ## About you - **You are a good communicator and team player**. You know how to navigate within a lean, start-up like organization. - **You are solution and goal-oriented, resourceful while still keeping a flexible mindset**. You take self-responsibility and initiative and possess a can-do attitude. - **You have an ownership mentality**. When you take on a task, you get it done. You proactively troubleshoot problems blocking your path, and the problems blocking the paths of others. - **You're organized**. You have strong habits that let you track multiple accountabilities simultaneously. You know how to scope a project, foresee difficulties and translate an idea into reality. - **You share Ethereum's values**. You're passionate about the Open Source and/or Free Software movements and decentralization. - **You have cross-cultural expertise**. You are experienced in working with international teams across various time zones. ## Contract details Contract position Fully remote To apply to this position, please include a brief (less than one page) cover letter explaining your qualifications, what motivates you, along with a resume or CV.
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Blagoj Dimovski
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Account abstraction multifactor authorization using WebAuthn

Project Abstract Given all the possibilities created by the account abstraction implementation, authorization from a user perspective will be always a challenge. We intend to solve that by providing a generic way for users to be protecting their wallets with an extra layer of security when authorizing transactions - which can be their fingerprint, face, a usb device etc. A lot of existing technologies, that can be found in both desktop and mobile, like TouchID, FaceID etc., currently make this possible via the WebAuthn standard, and we plan to research and build a generic and easy to use way for integrating this in a smart contract wallet and in any Web 3 application. Objectives Our main objective is to provide a great UX for developers to easily integrate this feature in their applications, without much hassle, and the same great UX experience for the end users that will be using this. We intend to achieve that by setting a goal to define generic primitives that any Web 3 project can use to integrate WebAuthn for their use case that uses smart contract wallets. These generic primitives will enable integration with the smart contract wallet account (via extensibility or pluggable component), as well as an integration in the application’s backend, in a seamless way. Any new or existing Web3 project that wishes to either include an extra layer of security for their user’s access to their wallets, should find it really easy to do.

3/12/2023
Anonymous chat app <-> ZK Keeper integration

Register to InterRep with an identity commitment Once registered, you can use the same identity commitment for using the RLN anonymous chat app. ZK-Keeper can be used for managing identities The RLN anonymous chat app can check if the identity is registered to InterRep (part of InterRep group) If the identity is not registered, the user should be redirected to InterRep for registration If the identity is registered the user can use the app (send messages) The ZK-Keeper extension can generate proof based on the user's active identity. Once proof is generated, it can be send from the RLN chat app client to the RLN chat app server for proof verification and further message broadcasting. If the message is a spam, the user should be slashed -> removed from the RLN merkle tree and the user's id commitment should be added into a ban list, so that the user can not register again.

1/30/2022
RLN spec (canonical Poseidon + IncrementalQuinTree)

**Note: For the spec of the old RLN construct implementation please refer to this link. Membership Each member has a secret key that is denoted by a_0. And identity commitment q is the hash of the secret key q = h(a_0) To become a member one must: Provide a certain form of stake

1/12/2022
Project lead for the Private messaging for ETH2 validators project, Privacy and Scaling Explorations Research Group

Research and development · Fully Remote, RM About the Privacy and Scaling Explorations Research Group We are a cutting-edge technological research group exploring practical applications for Zero-Knowledge Proofs and Scaling solutions, in partnership with the Ethereum Foundation. Our mission is to build the cryptographic primitives that will form the bedrock of a rich and vibrant ecosystem of decentralized applications (dapps), built on Ethereum. We do this through pure research projects, by building proofs of concept, and by facilitating the integration of technological primitives into decentralized applications. Your mission We've been working on several ideas, as well as multiple different libraries for the RLN ZK construct. Our goal is to make the broader community more aware of the construct and the possibilities enabled by it, as well as develop real-life products which use the RLN construct. The Private message sharing for ETH2 validators project is currently only a specification for a promissing tool which will enable the Ethereum 2 validators to communicate privately. There is a written specification for scope of the projects, the underlying tools to be used as well as the user interactions. Your mission will involve developing the tools needed for enabling the project (gossipsub-rln), as well as developing the project by using these tools.

10/22/2021
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