Product Development

We develop usable products that advance digital security and protect the privacy of users.


Keep your data private in our cloud

S4's Move to PrivateStorage

PrivateStorage is a joint venture product developed and maintained by Least Authority and Private Internet Access. As firm believers in protection of our customers’ privacy, we joined efforts to offer a private, secure and end-to-end encrypted solution to allow the end user — not third-parties — to determine whether and to what extent the personal data on the storage service is collected, shared, and processed. PrivateStorage has been designed with privacy and security features to give you the control of who has access to your data. We cannot see your data when it is stored by us.

Features: Client-side encryption, accountless authentication


Zero Knowledge Access Passes: anonymous, token-based authorization protocol

Business Data Privacy Problem​

Zero Knowledge Access Passes attempt to solve the issue of privacy-preserving payments. This anonymous, token-based authorization protocol based on Privacy Pass for use by PrivateStorage helps facilitate an online exchange of value while disconnecting the payment and service data that is gathered on customers.

Features: Ability to separate personal payment data from personal service-use data, use of zero-knowledge proofs

Magic Wormhole

Get files from one computer to another, safely

Secure, Identity-less File Transfer

Magic Wormhole, created by developer Brian Warner, is a clever way to send files easily and securely. The codes are short and human-pronounceable, using a phonetically-distinct wordlist. The receiving side offers tab-completion on the codewords, so usually only a few characters must be typed. Wormhole codes are single-use and do not need to be memorized.

In 2020, we were awarded funding from the NGI Trust program to explore commercial opportunities for Magic Wormhole. We’ve named this project, MW4ALL — Magic Wormhole for All. We are investigating how to develop a sustainable product built on Magic Wormhole and to determine how to scale it technically without compromising its security. In other words, bringing Magic Wormhole to the masses for everyone to enjoy safe and simple file sharing.

Features: Identity-less, files not stored on third-party servers