Those who have been in crypto long enough remember the not-so-good-ol' days when an air-gapped machine was the only way to store private keys securely. Thankfully, the wallet space has come a long way from that era. But we still live in a world where the seed phrase is the single atomic point of failure. Enter threshold signatures schemes (TSS), a multi-party computation (MPC) where different parties generate a key and are all required to create a valid signature. We're joined by Omer Shlomovits and Ouriel Ohayon, Co-founders of ZenGo. Their product is a '˜keyless' crypto wallet, which means users never need to generate or store a key which gives them access to their funds. Keys are created with an MPC, where both ZenGo and the user are required to sign a transaction. TTS opens up exciting new possibilities like social recovery, user permissions for teams, and inheritance planning schemes. The important distinction between ZenGo and existing multi-signature wallets is that they achieve this using only cryptography, and do not rely on on-chain elements like smart contracts or op_scriptSig in Bitcoin. Topics discussed in this episode:Omer and Ouriel's respective backgrounds in academia and online consumer-facing productsWhat lead them to want to build yet another crypto walletThe state of custody in the crypto wallet ecosystem and the challenge which remain unaddressedA quick refresh on cryptographic primitives and multi-party computations (MPC)The building blocks of cryptographic signatures and threshold signature schemes (TSS)How TSS is different from Bitcoin multi-sig and smart contract multi-sigTSS in ECDSA vs. Schnorr signaturesApplications and use cases for TSSZenGo's on-boarding, restore process and use of biometricsThe future of wallet interoperability in a world of proprietary cryptographic schemes Links mentioned in this episode: ZenGo: Bitcoin & Cryptocurrency Wallet'ŽZenGo: Bitcoin & Crypto Wallet on the App StoreThreshold Signatures ExplainedHow ZenGo guarantees access to customers' fundsShareLock: Mixing for Cryptocurrencies from Multiparty ECDSAKZen Networks on GitHubZengo ResearchKZen Research Telegram GroupTel Aviv Blockchain Week Recap with Anna Rose of the Zero Knowledge PodcastHow ZenGo guarantees access to customers' funds Sponsors: Vaultoro: Trade gold to Bitcoin instantly and securely starting at just 1mgTrail of Bits: Trust the team at the forefront of blockchain security research This episode is hosted by Sebastien Couture & Brian Fabian Crain. Show notes and listening options: epicenter.tv/306