Open Two-Factor Authenticator

An open-source two-factor Time-based One-Time Password (TOTP) authenticator with SHA-256 secure storage

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Open Two-Factor Authenticator is a free, open-source Chrome extension offering secure two-factor authentication (2FA) using Time-based One-Time Passwords (TOTP). It employs SHA-256 encryption with AES-CBC to securely store your authentication secrets within the browser's synced storage. This design enables your encrypted keys to be synchronized seamlessly across multiple devices without compromising your privacy.

Supporting popular browsers like Chrome, Firefox, Edge, and Opera—with Android support in progress—this extension ensures your 2FA secrets never leave your devices or connect to any server. Customizable features include selecting the number of digits and validation periods for your codes, all while never storing your passwords. Enhance your account security effortlessly with Open Two-Factor Authenticator's reliable and private solution.

By:: https://add0n.com
Users:: 10,000+
Rating:: 3.00

(11)
Version:: 0.3.3 (Last updated: 2024-11-20)
Creation date:: 2019-09-12
Risk:: Low risk impact Low risk likelihood
Permissions:: storage
notifications
Size:: 275.46K
Email:: in*****@gmail.com
URLs:: Website ,Privacy policy
Full description:: See detailed description
Source:: Chrome Web Store
Updated:: 14 hours ago

Ranking

# 8,977 ▲ 123

Other rankings

#532 in Workflow & Planning ▲ 7 #84 in firefox keyword 23 ▲ 6 #128 in android keyword 16 ▲ 2 #190 in encrypt keyword 17 ▲ 2 #271 in device keyword 15 ▲ 6

Other platforms

Open Two-Factor Authenticator (v0.3.3)

297 3.20

(5)

Open Two-Factor Authenticator (v0.3.0)

5,718+ 4.00

(3)

User reviews

Pros

Works well for two-factor authentication

Cons

No option to copy the code directly
Issues with unwanted spaces when pasting codes
Old version was preferred by some users
Difficult to get the extension to work for some users

Recent reviews

no import

John Weiss, 2021-04-29

Werkt prima. Onhandige is, dat er geen optie bij zit om de code te kopiëren. En omdat het schermpje over je scherm opent waar je code moet invoeren, is enige optie de code te selecteren, rechtermuisknop en dan code kopiëren. Op zich prima, als er daardoor niet een spatie in het midden van de code wordt meegenomen (code bestaat uit 2x 3 cijfers). Voordat ik dat doorhad...Nu moet ik die spatie iedere keer verwijderen na het plakken. Room for improvement!

Esther Z, 2021-02-12

Old version was better!

김환, 2019-05-12

View all user reviews

Extension safety

Risk impact

Open Two-Factor Authenticator requires very minimum permissions.

Risk impact analysis details

Medium Enables sending notifications which can be spammed but have minimal direct security impact.

Risk likelihood

Open Two-Factor Authenticator has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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