A web-based cryptographic seed generator.

Passkey-only identity for collaborative web apps on Cloudflare Workers and Durable Objects

The Developer Web Site for Blockchain Commons

Gordian Envelope is a structured format for hierarchical binary data focused on privacy. They are designed to facilitate "smart documents" with a number of unique features: Hierarchical structure, Merkle-like digest tree, Deterministic representation, Privacy-focused, Progressive trust

Uniform Resources (URs) are URI-encoded CBOR structures developed by Blockchain Commons. This package is intended primarily for use in higher-level Blockchain Commons projects like Gordian Envelopes.

Sharded Secret Key Reconstruction (SSKR) is a protocol for splitting a secret into a set of shares across one or more groups, such that the secret can be reconstructed from any combination of shares totaling or exceeding a threshold number of shares within each group and across all groups. SSKR is a generalization of Shamir's Secret Sharing (SSS)

A pure TypeScript implementation of Shamir's Secret Sharing (SSS), a cryptographic technique in which a secret is divided into parts, called shares, in such a way that a threshold of several shares are needed to reconstruct the secret.

Provenance Marks provide a cryptographically-secured system for establishing and verifying the authenticity of works in an age of rampant AI-powered manipulation and plagiarism.

A multipart Uniform Resource (UR) QR code generator. It produces single-frame and animated fountain-coded QR sequences - suitable for transmitting arbitrarily large UR-encoded payloads through an airgap - with an optional logo overlay.

LifeHash is a method of generating visual hashes from data. It is based on Conway's Game of Life cellular automaton. Given the same input, LifeHash will always produce the same visual output, making it useful for verifying data integrity at a glance.