The **SSB Binary Field Encodings (BFE) Specification** defines a compact binary format (type‑format‑data) for the core identifiers and payloads used in Secure Scuttlebutt (feeds, messages, blobs, keys, signatures, encrypted data, generic values and identities). It is intended for developers building Scuttlebutt clients, libraries, or tools who need a deterministic, space‑efficient way to serialize these objects across different SSB implementations and extensions.