Gordian Sealed Transaction Protocol (GSTP) is a secure, transport-agnostic communication method enabling encrypted and signed data exchange between multiple parties. Built upon the Gordian Envelope specification, GSTP supports various transport mediums - including HTTP, raw TCP/IP, air-gapped protocols using QR codes, and NFC cards

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.

Provides a powerful pattern matching language for querying and extracting data from dCBOR (Deterministic CBOR) structures. It supports value matching, structural patterns, and meta-patterns with named captures.

The registry of ontological predicates used in Gordian Envelope, encoded as compact integers instead of strings.

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 collection of useful primitives for cryptography, semantic graphs, and cryptocurrency, primarily for use in higher-level Blockchain Commons projects. All the types are CBOR serializable, and a number of them can also be serialized to and from URs.

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Provides a pattern matching language for querying and extracting data from Gordian Envelope structures. It extends the dCBOR pattern matching capabilities with envelope-specific patterns for subjects, predicates, objects, assertions, and wrapped envelopes.

Hashing, symmetric encryption, key derivation, and signature primitives shared across the Blockchain Commons' TypeScript stack.

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.