Vault12, a pioneer in crypto inheritance solutions, has announced the open-source release of its Shamir Secret Sharing plugin for Capacitor, enabling app developers to integrate quantum-safe data storage for iOS, Android, and web applications.
The plugin brings information-theoretic security—protection based on mathematical impossibility rather than computational difficulty—to modern, cross-platform app stacks. By splitting sensitive data into multiple cryptographic shards, developers can eliminate single points of failure, designing applications that maintain security even in a post-quantum computing era. This technology has been in production for a decade, tested on nearly a million iOS and Android devices as a core component of Vault12 Guard, a mobile application offering decentralized backup and inheritance for crypto wallets and other sensitive data.
Blake Commagere, co-founder and COO of Vault12, stated, “Developers building self-custody and high-assurance apps need tools that won’t break the moment quantum computing becomes practical.” He added, “With the Shamir Secret Sharing plugin for Capacitor, we’re making the same Shamir’s Secret Sharing engine that powers Vault12 Guard available to anyone building the next generation of secure, user-controlled applications.”Shamir’s Secret Sharing (SSS), originally developed by Adi Shamir, mathematically divides a secret into multiple shares, requiring a configurable threshold of these shares for reconstruction. Individual shares reveal no information about the original secret, thereby preventing a single point of compromise from exposing user data. Capacitor is an open-source, cross-platform native runtime that allows developers to create iOS, Android, and web applications from a single JavaScript/TypeScript codebase. It offers a consistent API and plugin system to connect web frameworks (such as React, Vue, and Angular) with native device capabilities like secure storage, biometrics, and the filesystem.
Key features of the Shamir Secret Sharing plugin for Capacitor include: quantum-resistant security using Shamir’s Secret Sharing with information-theoretic guarantees; cross-platform support for iOS, Android, and Web via Capacitor; flexible storage options, including memory-based and filesystem-based operations; progress tracking for long-running operations and large files; robust recovery, supporting reconstruction of complete secrets or individual shards; and production-proven reliability, already safeguarding high-value digital assets for Vault12 Guard users.
Developers can access the source code, documentation, and implementation examples on GitHub. Further information on potential applications is available in an accompanying blog post. Founded in the United States over a decade ago, Vault12, Inc. focuses on resolving crypto inheritance challenges through quantum-safe encryption and decentralized social custody. The company is venture-funded, with investments from entities including Winklevoss Capital, Naval Ravikant, Data Collective, and True Ventures. Vault12 Guard is available on the Apple App Store and Google Play Store.
