Tender Surrender

The Email Verification Protocol (EVP) allows websites to confirm possession of an email address without users ever having to leave their browser, substantially reducing user friction. Beyond this immediate UX benefit, however, adopting EVP serves an even more critical purpose: completing the account lifecycle by seamlessly complementing passkeys.

When implementing passkeys yourself or investigating how passkeys work on other websites, setting up a debugger to capture requests and responses or parsing binaries to read the contents is not easy. You can easily achieve this using a Chrome Extension called WebAuthn DevTools.

At the FIDO Tokyo Seminar, I was told it's hard to track the high-level picture of how passkeys are evolving, and I thought it would be helpful to introduce key terminologies so you can get a grasp of the passkey world and look into more details when necessary. So here it is.

I have revamped my blog. While the visual design remains largely the same, I added an English version through multilingual support (i18n) and updated the underlying infrastructure.

I wrote a book titled 「パスキーのすべて」 (Everything About Passkeys). Here is a brief introduction to what's inside the book, which will be released on January 28th.