
Kryptonite
A new home for your SSH private key
Kryptonite launched on May 2, 2017 with 10 votes, #936 of 3,229 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 9 years on.
What it does
Unphishable, zero-touch two-factor logins
No more mistyping, missing 30 second windows, or waiting endlessly for that SMS. Krypton securely pairs with your computer so that you don't have to touch your phone for each sign-in. Optionally, enable One tap sign-ins for enhanced security. SMS and authenticator app codes can easily be phished. Don't let that happen to you. Krypton protects you from phishing. Setting up two-factor can be time consuming and repetitive. Just scan once with Krypton. Krypton implements the standardized FIDO Universal 2nd Factor (U2F) protocol to provide secure, un-phishable two-factor authentication on the web, using just your phone. Krypton is built on top of an end-to-end verified and encrypted…from krypt.co
Does a similar job
all alternatives →- KAKryptonite – a new home for your SSH private key2017 · krypt.co · ▲338
Unphishable, zero-touch two-factor logins

- KFKrypton for Teams – Simple SSH Key Storage for DevOps2018 · krypt.co · ▲53
Unphishable, zero-touch two-factor logins

keychains.devFeb 2026 · keychains.dev · ▲177Hi HN — I’m a heavy OpenClaw user and, like many others, I’ve been thinking about how to give these new “unleashed” agents secure access to my accounts. Agents need API access to be useful. But API keys are long-lived secrets. And agents are not secure environments. So I built something for myself that quickly turned into a product: keychains.dev. The idea is simple: agents never see raw credentials. With Keychains.dev: • Agents make API calls via a drop-in replacement for curl or JavaScript’s fetch() • They use template variable names instead of embedding credentials • The request is…

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