2fas

.2fas — 2FAccount Security Archive

Security Standards Foundation · 2018

Developer

Security Standards Foundation

Key Features

Strong encryption for sensitive 2FA data
Data compression to reduce file size
Centralized storage for backup codes and recovery keys
Password or key-based security for access control

Best For

Creating secure, encrypted backups of critical 2FA information
Users who need an offline, tamper-evident repository for security credentials
Protecting sensitive data from accidental deletion or hardware failure

Less Ideal For

Storing active authentication tokens (as this is for backup)
General-purpose file archiving (use .zip or .tar.gz instead)
Sharing sensitive credentials with others
Everyday access to authentication codes

Common Use Cases

Offline backup of 2FA recovery codes
Secure storage of authenticator app secrets
Archiving account recovery information
Centralizing security data for multiple online accounts

How to Open It

Install a dedicated .2fas viewer/manager application (check the official website for recommendations).
Open the application and select the option to import or open a .2fas archive.
You will likely be prompted to enter the password or provide the key used to encrypt the archive.
Once opened, you can view, manage, or export the contained security data.

What is a .2fas file?

The .2fas file format is a specialized archive designed for securely storing and managing two-factor authentication (2FA) credentials and associated security data. It combines encryption and data compression to protect sensitive information like backup codes, recovery keys, and account recovery data. This format aims to provide a single, protected file that users can store offline or in secure cloud storage, offering a centralized backup for their 2FA setups. Its structure is designed to be resilient against unauthorized access, making it a valuable tool for users who want an extra layer of security for their online accounts.

Programs That Open .2fas Files

Platform	Program
Windows	2FAccount Security Manager	Free	Official
macOS	2FAccount Security Manager	Free	Official
Linux	2FAccount Security Manager CLI	Free
Android	2FAccount Security Mobile	Free	Official
iOS	2FAccount Security Mobile	Free	Official

Common Problems with .2fas Files

⚠️ Forgot the password for the .2fas file.

Unfortunately, if the password is lost, the data within the .2fas archive is irrecoverable due to the strong encryption. Ensure you store your password securely or use a password manager.

⚠️ .2fas file won't open with standard archive tools.

.2fas files are specialized. You need to use software specifically designed to handle this format, typically provided by the Security Standards Foundation or authorized partners.

Frequently Asked Questions

Is .2fas a good format for storing my actual authenticator app secrets?▼

Yes, many .2fas implementations support importing and securely storing the secret keys used by authenticator apps, in addition to backup codes. Always verify the specific software's capabilities.

Can I use .2fas to share my 2FA codes with someone?▼

It is strongly discouraged. .2fas is designed for secure, personal backups. Sharing an encrypted file containing sensitive security data would require sharing the decryption key/password, negating its security benefits for sharing purposes.

Technical Details

A .2fas file is essentially a compressed archive, typically using standard compression algorithms like Gzip or Zstd. The key feature is the robust encryption applied to the contents, often employing AES-256 or similar strong ciphers, secured by a user-defined password or a key. The file structure may also include metadata about the stored credentials and their associated services.

Did You Know?

The .2fas format was developed with the principle of 'security through obscurity' combined with robust, standard encryption.

Its specification includes provisions for future compatibility with emerging authentication methods.

Security Information

The security of a .2fas file relies heavily on the strength of the password or key used for encryption and the trustworthiness of the software used to create and open it. Always use a strong, unique password and obtain software from official sources. Store the .2fas file in a secure location, preferably offline or in an encrypted cloud storage service.