出典確認済みリサーチ: Kraken VS Coinbase Passkey

Decision outcome: Before replacing authenticator-app 2FA with passkeys or security keys, create at least two independent recovery paths, test them on the devices actually used, document which email and phone records can recover the account, keep seed phrases out of support chats, and stop if a recovery flow asks for a password, passkey export, private key or one-time code outside the official domain.

Evidence snapshot. This article was researched at 2026-09-22T02:44:00.289Z using Kraken Support, Coinbase Help. A local queue, old draft, search snippet, social repost, price chart or AI summary was not treated as proof. Those surfaces can suggest a question, but every material claim below is tied to the cited source list and claim map.

Verified facts. Claim c1: Kraken Support says passkeys can be used to satisfy sign-in 2FA and are bound to a website or app identity to reduce phishing risk. Claim c2: Kraken Support says users who cannot locate a passkey can begin account recovery from the Kraken sign-in page after entering email or username and password. Claim c3: Coinbase Help recommends passkeys or security keys for 2-step verification and describes a passkey plus security-key backup combination. Claim c4: Coinbase Help says trusted contacts can approve account recovery requests and recommends checking account records for unauthorized recovery emails or phone numbers. These facts are intentionally narrow. They do not prove account eligibility, future availability, execution quality, legal status beyond the cited wording, tax treatment, account approval, support outcome, redemption success, price direction, liquidity depth or platform solvency.

Decision discipline for Kraken vs Coinbase passkey security key recovery controls. The useful answer is not a universal winner. It is a source-bound scorecard: which official source answers the immediate question, which control is blank, which blank changes user risk, which test is reversible and which condition reopens the decision. An honest blank is safer than an invented advantage.

FAQ. What is the short answer? Kraken and Coinbase both frame passkeys or security keys as stronger account authentication, but their recovery surfaces are different. What should be verified first? Verify the official source and the exact control surface. What should not be inferred? Do not infer eligibility, future support, legal treatment, tax treatment, recovery, execution quality, liquidity, redemption, consumer protection or account approval. When should the user stop? Stop when source, object, user state, permission, route, issuer, jurisdiction or failure handling is unclear.