Modern Wallet Security: Understanding Cloud Backups vs Passkeys
How passkeys and cloud backups compare in terms of wallet security and convenience.
Michail Brynard
I'm Michail. I co-founded Rehive in 2015 and have been building it ever since. It's a platform companies use to launch and run their own stablecoin and fintech apps. We started in Stellenbosch, and I've since lived in San Francisco and Amsterdam. I'm now in Barcelona, where my wife and daughter are from.
Side projects
- HaddonAn open-source double-entry ledger for AI agents.
- 1two3A blazingly fast website and app builder: describe what you want and use it seconds later.
- Remix MoneyA global dollar account with a Claude agent built into the app: you describe a change and the agent reshapes your live app in real time.
- WalletStatementsVerifiable proof-of-funds statements for Bitcoin, signed on your hardware wallet.
Writing on wallet security
A series of notes I wrote in 2024 while experimenting with Doppio, a side project that became the basis for Rehive's move into white-label self-custody.
How Account Abstraction Fixes Crypto's Biggest Design Flaws
How smart wallets eliminate seed phrases, enable gasless transactions, and make recovery practical.
Open Source Where It Matters in Wallets
The role of open source in crypto wallets.
The Future of Crypto Wallets: MPC, Multisig or Smart Wallets?
Which multi-key technology is best suited for mainstream crypto adoption?
A Framework for Comparing Crypto Wallets
A practical look at crypto wallet security and convenience trade-offs.