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sec: answer the gate's first catch — two constant-time advisories, and pin an allowance to the version it excuses
The advisory gate from #443 found something on its first real run, two days
after landing: RUSTSEC-2026-0385 and -0387, both published 2026-10-23, neither
of which existed when the sweep was done. That is the gate doing the job it was
added for, so this is the answer rather than a new allowance.

  ctutils 0.4.2/0.4.3 -> 0.4.4   RUSTSEC-2026-0385, non-constant-time mask
                                 generation and `u128` comparisons. Reaches
                                 openpay's wallet crates through
                                 digest -> hmac/hkdf, so it sits under HMAC on
                                 payment paths. Fixed in four lockfiles.
  crypto-bigint 0.7.3 -> 0.7.6   RUSTSEC-2026-0387, secret-dependent branches
                                 in subtraction, zero counting, division and
                                 Montgomery multiplication — operations whose
                                 whole purpose is to be constant-time.

The 0.5.5 line of crypto-bigint cannot follow: elliptic-curve 0.13 pins it, so
reaching >=0.7.6 means moving the p256/elliptic-curve stack across openpay,
sandbox, wai and jouleclaw. That is an upgrade, not a bump. It is allowed with
that reason recorded, on paths that sign and derive keys, so it reads as debt.

Writing that allowance exposed a weakness in the check itself: ALLOW was keyed
by advisory id alone, so an entry excusing the stuck 0.5.5 line would have gone
on excusing the advisory if a patched 0.7.x copy later regressed to an
unpatched release — the same shape as sealing by name instead of by digest. An
entry may now pin the exact crate/version pairs it covers:

    "RUSTSEC-...": {"why": "...", "only": ("crypto-bigint 0.5.5",)}

Any other version of that crate fails, and a named pair that disappears makes
the entry stale, so the pin cannot keep describing a tree that moved. The
version-blind string form is kept for reasons that genuinely do not depend on
the version, such as a call we never make, and the two forms are documented
against each other.

The self-test now builds its documents by importing the check's real ALLOW
rather than scraping it with grep, so the two cannot drift, and covers the two
new failure modes: a version-pinned allowance offered a version it does not
name, and one whose named pair is gone.

Also moves off every yanked dependency, each a patch bump: chacha20
0.10.0/0.10.1 -> 0.10.2 (a cipher, in six lockfiles), der 0.8.0 -> 0.8.2, spin
0.9.8 -> 0.9.9 and 0.10.0 -> 0.10.1, iroh-blobs 0.101.0 -> 0.101.1. A yank is
the author withdrawing a release; none of these needed to stay on one. No
yanked dependency remains anywhere in the tree.

All 47 lockfiles current; the six affected workspaces check clean and
`mls_keying` passes.

Co-Authored-By: Claude Opus 5 <[email protected]>
2026-10-24 20:06:05 -04:00
..
conformance smart-byte: governance, burns and transfers between clusters, with vectors 2026-10-01 11:48:44 -04:00
smart-byte-rs sec: answer the gate's first catch — two constant-time advisories, and pin an allowance to the version it excuses 2026-10-24 20:06:05 -04:00
spec smart-byte spec: governance, burns, and transfers between clusters 2026-10-01 11:10:54 -04:00
vocab vocab v1 SHACL shapes across sister standards (wave-23 #4/#5) 2026-06-02 18:55:56 -04:00
LICENSE Initial import — three open standards under one shelf 2026-05-23 07:58:09 -04:00
README.md licences: ship the Apache-2.0 text the code already declares 2026-10-09 17:22:32 -04:00
SECURITY.md Initial import — three open standards under one shelf 2026-05-23 07:58:09 -04:00
THREE_FACES.md Initial import — three open standards under one shelf 2026-05-23 07:58:09 -04:00

Smart Byte

A carrier for value. Settlement-agnostic, energy-attributed, no off switch.

The smart byte is not money — it is a vesicle (the cellular-biology sense): a content-addressed, signed envelope carrying exactly five things — identity (the blake3 hash of its origin attestation), provenance (the issuer's signed birth certificate), an ownership chain (signature-bound transitions), cargo (whatever value it represents — USD, joules, compute-hours, votes, attestations, claims; the substrate is agnostic), and a two-part joule cost (measured + estimated, cumulative over its life). Consensus is lockstep deterministic simulation with BFT supermajority commit; the substrate scales by federating many bounded clusters, not by growing one. It is TCP/IP for value: an open, application-agnostic carrier that any matching, clearing, or trust-signaling layer can build on.

The substrate is intentionally ownerless: no protocol-level token, permissive licensing on the spec text and reference code, conformance test vectors so any implementer can verify canonicity without a trust relationship with the authors. The protocol's identity lives in its conformance vectors and content-addressing, not in any brand. Transaction Science is one steward — it publishes the spec, ships a reference implementation, and operates commercial services around the substrate — not its proprietor.

Contents

  • spec/treatise_v1_parts_I_II_III_combined.md — Smart Byte Substrate: A Treatise (Parts I–III: the foundation, the substrate architecture, the security engineering; Parts IV–VII previewed)
  • strategic_context.docx — The Strategic Context: Why the Substrate Makes Sense in 2026
  • SECURITY.md — the working security-engineering summary: it's a digital system on the internet, secured the way digital systems on the internet are secured (conservative cryptography, encrypted transports, reproducible multiply-reviewed builds, standard layer-2 key custody, standard availability engineering, textbook BFT consensus) plus a handful of new compositions of those proven parts. Plus the vulnerability-reporting process.

Status

Treatise v1.0 (May 2026). The conformance specification (byte-level wire formats) and the reference implementation referenced in the treatise as "v0.3" are to be brought into this repository.

Licence

Specification text: CC-BY-4.0 (see LICENSE). Reference implementation in smart-byte-rs/: Apache-2.0 (see smart-byte-rs/LICENSE).

  • EOC (../eoc/) — the energy-optimized AI compute substrate; the smart byte's energy attribution depends on an honest joules-per-task substrate.
  • Settlement (settlement.science) — the flagship regulated financial institution running on the substrate as an issuer and consumer of smart bytes.