問91
頻出度★★★
シングルサインオンの特徴として, 適切なものはどれか。
平成30年度 春期 ITパスポート試験 問91
This question's explanation and your answers so far.
解説
問 91
Incorrectア
The statement that data processing and storage are done on the server side and no data remains on the terminal is a characteristic of a “thin client”, and has nothing to do with single sign-on, which is a mechanism that needs only one authentication.
Incorrectイ
Automatically distributing data across multiple disks to raise availability is a characteristic of storage (storage-device) technologies such as RAID or mirroring, and is unrelated to single sign-on.
Incorrectウ
Strengthening authentication by combining biometric information such as a fingerprint or iris in addition to a password is a characteristic of “multi-factor authentication (biometric authentication)”. It is about raising the strength of authentication, which is a different thing from single sign-on, where one authentication lets you use multiple services.
- エ
正解 The correct answer is “エ”. Single sign-on (SSO) is a mechanism in which, once a user is authenticated (logs in) just once at the start, that authentication result is reused so the user can access the multiple permitted services or systems without logging in again each time. Because it saves the trouble of repeatedly entering an ID and password for every service, convenience is improved; this is a representative characteristic of SSO and matches the description in “エ”.
ここがポイント
- Single sign-on (SSO) = a mechanism that lets you access the multiple permitted services without logging in again after authenticating once. Its aim is to improve user convenience and reduce the burden of password management.
- Distinguish that SSO is a technology that “reduces the number of authentications”, and differs in purpose from “multi-factor authentication that strengthens authentication” and from data-protection technologies (thin client, RAID).
用語