二に段だん階かい認にん証しょう

に

だ

ん

か

い

に

ん

しょ

う

Meanings

1

noun

two-factor authentication; 2FA

computing

Computing term for a security process requiring two different verification methods.

アカウントの安あん全ぜんのため、

二に

段だん

階かい

認にん

証しょう

を

設せっ

定てい

し

て

ください

。

Please set up two-factor authentication for your account's security.

二に段だん階かい認にん証しょうでは、パスワードに加くわえてスマホに送おくられるコードが必ひつ要ようです。

With two-factor authentication, you need a code sent to your smartphone in addition to your password.

Kanji

段grade, steps, stairs
階storey, stair, counter for storeys of a building
認acknowledge, witness, discern
証evidence, proof, certificate
二two, two radical (no. 7)

Related words

認にん証しょう
認証 is the general term for authentication or certification; 二段階認証 specifies the two-step variant.
多た要よう素そ認にん証しょう
多要素認証 (multi-factor authentication) is a broader category that includes two-factor authentication as a subset.

Written forms

二に段だん階かい認にん証しょう
Standard kanji spelling.
２に段だん階かい認にん証しょう
Variant using half-width numeral ２; less common than the full kanji form.

Etymology

Compound of 二 (two) + 段階 (step, stage) + 認証 (authentication). A direct calque of English 'two-factor authentication', widely adopted in Japanese IT contexts.