DAVE BLUMENFELD

// Founder & Engineer

Engineer and cryptographer. Acquired founder building at the intersection of applied cryptography, hardware security, and AI-agent infrastructure. 10 years in aerospace / defense as an ASIC designer.

Open to advising and collaboration in these areas.

METRICS
0+Years Hardware
0+Years Product
0+Newsletter Subscribers
EXPERIENCE // PROJECTS

Multifactor

FOUNDING ENGINEERYC F25

Zero-trust account management for AI agents — share a link, not your credentials. Backed by a $15M seed led by Nexus Venture Partners. I lead all applied cryptography: secure enclaves and protocol implementation. - Checkpoint: a hardware-secured man-in-the-middle proxy that enables an AI agent to use your online accounts without ever having access to your login credentials. - Solid2FA: a hardware-secured message relay for email and SMS 2FA codes. Enables an AI agent to log in to your online accounts without ever having access to your 2FA codes. - Open-source authorization library (in progress): cryptographically enforced authorization using proxy re-encryption to model access policies as chains of keys rather than database rules.

Keypo

FOUNDER & CEOACQUIRED BY MULTIFACTOR

Hardware-secured, privacy-preserving developer tools for AI and crypto applications. Our products include: - Keypo CLI: key management for AI agents. Keypo CLI enables AI agents to use secrets (API keys, credentials, credit cards and crypto wallets) without having access to them in plaintext. Secrets are hardware-bound to Mac Secure Enclave passkeys with fine-grained usage policies. 170+ GitHub stars. - Keypo App: seed phrase recovery app that splits your seed phrases across multiple devices using Shamir Secret Sharing and Secure Enclaves. - Keypo SDK: decentralized encryption SDK for building applications that put their users in full control over their data.

Michael Mann Archives

FOUNDER & PM

Token-gated interactive experience for director Michael Mann's filmmaking archive, beginning with Ferrari. Featured on the LA Times.

OpenClaw XMTP

DEVELOPEROPEN SOURCE

Built OpenClaw integration with decentralized messaging protocol, XMTP, to enable serverless E2EE messaging with OpenClaw AI agents.

AI Agent Wallet

FOUNDERDEVELOPER

Most agent wallets use cloud secure enclaves to protect keys and enforce rules. Keypo uses your Mac's Secure Enclave and EIP-7702 smart accounts - same security, fully self-custody. Your agent can do anything onchain, but no one (including your agent and Apple) can extract your keys. Add programmable rules like spend limits and allowlists to control exactly what your agent can and can't do.

Art Gobblers

GTM LEADOPEN SOURCE

Collaborative art platform co-created by Justin Roiland (Rick and Morty) and Paradigm. $30M+ in secondary market volume within 30 days of launch.

MNTGE // M-STAR

PM

Tech-enabled vintage fashion startup using NFC technology to build interactive experiences. Partners included IYK, Christie's Auction House, Wrangler, and StockX.

Digital DVD

DEVELOPEROPEN SOURCE

Token-gated streaming using on-chain TEE encryption with Lit Protocol and decentralized video player Livepeer. Access controls create a decentralized DRM system.

Ape Drops

FOUNDER & PM

Digital music marketplace in partnership with Snoop Dogg and Wiz Khalifa. $1M+ in first-month revenue.

AI Tour Guide

DEVELOPERSTEALTH

POC for major film studio for interactive AI-powered tour guide experience with Meta Ray-Bans. Real-time contextual conversation and interactivity built into experience.

CAREER

CAREER TIMELINE

2026 – Present
Founding Engineer
MULTIFACTOR (YC F25)
  • Lead all applied cryptography — secure enclaves and protocol implementation — for zero-trust account management for AI agents ($15M seed led by Nexus Venture Partners)
  • Built Checkpoint, a hardware-secured man-in-the-middle proxy that lets an AI agent use your online accounts without ever having access to your login credentials
  • Built Solid2FA, a hardware-secured relay for email and SMS 2FA codes so an agent can log in without access to your codes
  • Building an open-source library for cryptographically enforced authorization using proxy re-encryption
2024 – 2026
Founder & CEO
KEYPO (ACQUIRED BY MULTIFACTOR)
  • Founded and led Keypo — hardware-secured, privacy-preserving developer tools for AI and crypto applications (CLI, iOS/macOS apps, SDK)
  • Grew Keypo CLI to 170+ GitHub stars; shipped both iOS and macOS apps to the App Store as sole technical founder
  • Acquired by Multifactor (YC F25)
2016 – 2022
Director R&D
EMCORE CORPORATION
  • Led hardware design (PCBA, FPGA, automated testing) for autonomous drone navigation systems
  • Managed 20-person team and built 5 products for customers including a tier-1 defense contractor (Raytheon)
  • Oversaw 2 products through MIL-STD-810 to production
  • Prototyped build/test for motion sensors and navigation systems, including extreme heat and space systems
2014 – 2016
VLSI Design Engineer
MOSIS
  • Designed and tested semiconductor ASICs across TSMC, Samsung and IBM/GF process nodes (180nm to 14nm) in CMOS and SiGe technologies
2013 – 2014
Electrical Engineer
PRESTON CINEMA
  • Ran testing and manufacturing for motion control lens products
EDUCATION
MS Electrical Engineering
USC — 2014
Mixed-Signal ASIC Design
BS Electrical Engineering
UCLA — 2012
ASIC Design