zk
Tea, tech, and secrets: how ketl onboards founders and VCs with zk
Meet ketl: private work-based socials powered by zk proofs. We have built the first anonymous credentials for all YC founders. Find out more and download on TestFlight!
Pratyush Ranjan Tiwari
Founding Cryptographer
privacy
Account abstraction and onchain identity: EIP-4337 and beyond
Find out what EIP-4337 is and its impact on the onchain identity-based infrastructure.
cryptography
An incomplete guide to E2E encrypted communication for groups
In this blog post, we look at open-source protocols that support end-to-end encrypted communication for groups. We cover the protocols from Signal, Matrix, and XMPP. Encrypted group conversations today can use some UX innovation.
privacy
On Vitalik's vision for a Private, Multi-address future
Vitalik's recent blog post on stealth addresses brought privacy concerns back to the limelight. In this response blog post, we dig deeper into the technical challenges to solve so we can move to a private, multi-address future for crypto.
cryptography
Private ECDSA Verification using ZK: Motivation, Optimizations & Security
Verifying ECDSA signatures privately, using zk proofs allows us to create anonymous credentials compatible with your existing Ethereum (and other) addresses. Verifying these signatures in circom is expensive. This blog post addresses the security of the recently proposed optimizations.
A Deep dive into Private Email Attestation
My last blog post discussed why we need private email attestation. As promised at the end of that blog post, this is a deeper dive into how exactly we achieve this goodness. Let's establish our goals first. What do we want to accomplish here? The SealCred email domain
big whale labs
Why we need private email attestation
An insight into our motivation for building privacy tools. This post focuses on the issues with email and the missing technological links. Our private email attestation tool bridges a lot of these gaps.