Why use OnlyKey WebCrypt? Very simply, it is one of the easiest and most secure ways to use OpenPGP. WebCrypt is used for sending and receiving encrypted messages and files directly in the browser. Its universally supported in Firefox, Brave, Chrome and essentially all browsers that support FIDO2, with iOS 13.3 its even supported in Safari on iPhone. Its revolutionary approach keeps OpenPGP keys in cold storage, securely stored on OnlyKey, not accessible to apps or to the browser.