The author approved the draft v0.16 on 7 October 2026 with the
recommendation of each of its decisions: the review of v0.15 by Astra, a
seal without accuracy, the key of words in the recovery annex, a full last
chunk of age, the evidence of a signature with certificates and drand's
JSON read strictly. Only the date of the header changes in the text;
spec/README.md records its SHA-256, and annex/recovery.md is written again
with it. The READMEs, SECURITY.md, the traceability, the CDDL header, the
README of testdata and the CHANGELOG name v0.16 and its tag.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The editor had written the escapes of the sources as their characters:
the cases "round escaped as round" and "round twice, once escaped as
round" of release.json had a plain round, and the surrogate pair of
"a surrogate pair in a value" a plain emoji, so the shared vectors tested
no escaped name. TestStrictJSON had lost its escaped é, its pair and the
escape after a lone high surrogate. They are escapes again, and the texts
of words_test.go too, so that no mark or invisible character hides in the
source. release.json gained 26 cases of drand's JSON, not 25 as b570338
says; the draft and the CHANGELOG now say 26.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
scripts/recovery opens a time_and_key capsule with the words of a key of
words (-words FILE), as the annex says in 79.7: the normalization without
tables for the text of the DateKeys lists (printable ASCII, the ASCII
spaces, á é í ó ú ü ñ and their capitals, and the marks U+0300 to U+036F),
and for any other text the full one, NFD, without the marks, simple lower
case and the spaces of 38.1, from UnicodeData.txt of Unicode 18.0.0
(-unicodedata FILE), checked by its SHA-256; then PBKDF2-HMAC-SHA256 of the
standard library. Its tests check both normalizations against every case
of wordkey.json and the two vectors of the annex.
Two fixtures of v0.16: format3_time_and_key_words, opened with the text of
the second vector of the annex, recorded in words_text with the identity it
gives; and format3_full_chunk, whose BODY and P are 65536 bytes, so that
PAYLOAD_AGE ends in a full STREAM chunk (79.5). recovery_check.sh opens
both. wordkey.json gains the text of the annex, also with its marks apart.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
JSON of RFC 8259 in UTF-8 whose value is an object; no object repeats a
name, and names are compared exactly once their escapes are decoded, so
"round" is round and ROUND another name; an escape of a lone surrogate
is malformed; round is a number without sign, fraction or exponent from 1
to 2^53 - 1; signature and randomness are strings (spec v0.16, 47.1). Go's
encoding/json kept the last of two repeated names and matched ROUND to
round. ParseDrandJSON, exported, is the one reader of drand's JSON:
provider/drand reads the answers of the relays with it too. The error
texts do not change.
release.json gains 25 cases of drand's JSON for v0.16.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A valid seal is S4 only when its token carries accuracy and t plus the
accuracy is before round_time; otherwise S5, whose text gives the reason,
the first that holds: sealed after or too close, no accuracy under the BTSP
policy of ETSI EN 319 421 (0.4.0.2023.1.1), or no accuracy (spec v0.16,
29.7, 29.11). The line of a signer of F6 whose seal does not prove it says
so with the same reason. cms.Token gains HasAccuracy, Policy and BTSP;
Verdicts gain SealReason and SignerLine.Reason; EncryptFiles returns the
verdicts of the area it wrote in Result.Security, so that a writer warns of
a seal without accuracy (rule 19).
security_cms.json is made again: 143 cases, the seals about something else
with an accuracy of a second, and the new cases of 64 with seal_reason.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The author approved the draft v0.15 on 7 October 2026, after removing the
.dkr file from it: the long-term recovery of capsules rests on the release
object, archives and cache services of all rounds, a release in hand that
the clock does not stop, and the recovery annex. Only the date of the
header changes here. SpecVersion is 0.15, the records of the fixtures and
the vectors say so, and the frozen security_cms.json and locator.json
change only their spec field. spec/README.md records the SHA-256.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The author's decision of 7 October 2026. A release saved next to a capsule
cannot exist when the capsule is made, and once the date comes the capsule
can be opened: such a file only opens it again and does not cover the real
case, someone opening it decades later when drand is gone and nobody saved
anything. Long-term recovery rests instead on archives and cache services
that keep the releases of all rounds; a reader asks for its round and
verifies the signature against the pinned key.
Spec: the .dkr extension (section 20, back to v0.14), sections 1, 4, 8, 45,
47.1, 49, 50 (rewritten), 53, 62.1 (rule 28 removed, rule 26 reworded),
63, 70, 73, 74 (the datekeys.release .dkk extension dropped too), 76
(the v0.15 block, with the discarded design) and the annex 79. The
release object, the chain hash at step 10, step 9.c option B and the
archive format stay.
Code: decrypt -save-release and the command datekeys release are gone,
with writeRelease and their tests; decrypt -release FILE stays. The
release objects of testdata/releases are now <round>.cbor, and
TestVectorFilesAreCurrent fails on a file the generator no longer writes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The release of a round becomes a file, .dkr: a release object in
deterministic CBOR, {0: "datekeys-release", 1: 1, 2: chain_hash, 3: round,
4: signature}, which provider.EncodeRelease writes and DecodeRelease reads
with its layers (size, type and version, schema). provider.ParseRelease
also reads drand's JSON as the input of the caller. Verify checks the chain
hash a release names before its round and its signature, with
ERR_PROFILE_MISMATCH. provider.Archive reads a local release archive, the
informative format of the draft.
capsule.OpenOptions.Release takes a release in hand, a provider.Supplier,
exclusive with Source: Open does not compare it with the clock (step 9.c,
option B) and reports a clock behind it in Opened.ClockBehind; a network
source is still never asked before the round time. The CLI gains
decrypt -release FILE (.dkr, drand's JSON or a local archive),
decrypt -save-release FILE.dkr and the command release, which fetches,
verifies and saves the .dkr without opening the capsule.
Test data: vectors/release.json, releases/<round>.dkr for rounds 1000,
1001, 1004 and 2000, and a local archive of rounds 1000 to 1004. In
mutations.json every case says its source, "supplied" or "network"; the
case "round not reached yet", a release in hand, now opens, and four cases
are added: the same with a network source, a release of another round from
a network source, and two release objects of another chain. SpecVersion
stays 0.14 until the author approves the draft.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The author approved the draft v0.14 on 6 October 2026 with the
recommendation of each of its ten decisions; decision 8, one scheme of
drand, is the previous commit. Only the date of the header changes here.
SpecVersion is 0.14, the records of the fixtures and the vectors say so,
and the frozen security_cms.json and locator.json change only their spec
field. spec/README.md records the SHA-256 of the text.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The draft writes down what the completeness review of 6 October 2026 found
missing, and changes no format and no verdict: what the protocol does not
guarantee, the provider and the states of a profile, signatures and seals
against a quantum adversary, the web client, the entropy of a key of words,
and errata of section 76. Steps 10 and 11 of section 63 now give the root
of trust byte for byte, as the three implementations apply it: the message
a Quicknet round signs, its hash to G1 with its DST, and H2, H3 and H4 of
the tlock IBE. testdata/vectors/tlock_steps.json gives every intermediate
value for four published rounds, checked against drand, kyber and tlock.
SpecVersion stays 0.13 until the author approves the draft.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The author approved the draft v0.13 on 6 October 2026, as it stood: only
the date of its header changes. SpecVersion is 0.13, the records of the
fixtures and the vectors say so, and the frozen security_cms.json and
locator.json change only their spec field. spec/README.md records the
SHA-256 of the text, and the READMEs, SECURITY.md, the traceability table,
testdata/README.md and the changelog name v0.13.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
On an IPv6-only network with DNS64, a name that has only IPv4 addresses
resolves to an address of NAT64, which spec v0.12, section 44.1, always
rejected: a reader on such a network, as many mobile ones, could not
download the rest of an envelope. The draft v0.13 counts an address of
64:ff9b::/96, or of the NAT64 prefix of the network, by the IPv4 address it
holds (RFC 6052). An address of NAT64 written in a locator is still
rejected. Section 76 records the change with its case.
locator.CheckResolvedIP implements it for the readers that download, and
testdata/vectors/resolved_ip.json gives 42 cases. SpecVersion stays 0.12
until the author approves the draft.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The author approved the draft v0.12 on 6 October 2026, as it stood: only
the date of its header changes, and no normative text is added. SpecVersion
is 0.12, the records of the fixtures and the vectors say so, and the frozen
security_cms.json and locator.json change only their spec field.
spec/README.md records the SHA-256 of the text, and the READMEs, SECURITY.md,
the traceability table, testdata/README.md and the changelog name v0.12.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Spec section 64 of v0.11 asks for the vectors of the key of words, which
were only in the tests of package wordkey. The file has the words of 45
texts, among them each space of section 38.1 and three that are not; what a
writer does with 20 texts, with the text of the error of wordkey.Check; and
6 identities with their recipients, the vector of section 38.1 first. It is
regenerated by genfixtures and checked by TestVectorFilesAreCurrent.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The text of 44.1 now says what the reference already refused and a
second implementation that followed the text would have accepted:
segments of 1 to 63 characters that neither start nor end with a hyphen,
the scheme in lower case, 0x and the local names in either case, an IPv4
without leading zeros, and a CID of at most 128 characters in canonical
base32, with minimal varints and a digest of at least one byte. A port is
written without leading zeros: the reference accepted 0443 and 00443 and
refused 000443, the same number, and now refuses the three. Change 6 of
section 76 records it, and section 64 lists the cases.
locator.json is made again with 30 more addresses, 247 in all, and
TestAddresses checks the same rules.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- testdata/README.md: the files of v0.11 and of the draft, the spec
label 0.11 until the approval, 26 fixtures with format3_unsigned and
format3_note, security.json in its context with lines, security_cms.json
without the cases of no context, note.json, the new parts of
locator.json, and the corpus of 218 cases, 178 of the spec, with the
eight of the list of v0.11. The release of round 1000 is in the records
and in mutations.json, not in quicknet_rounds.json.
- docs/traceability.md: the cases of section 64 that security_cms.json
and locator.json now hold are no longer pending.
- CHANGELOG: security_cms.json and locator.json under the test data of
the draft, instead of pending.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Fixtures format3_signed_cms (alg 2, two certificates, each sealed, F6) and
format3_sealed (alg 1 and a seal of seal_type 2, F4 and S4), with the
certificates, SIGNERS, the commitments, SEAL_SUBJECT, the token and the
result of each signer in their records. vectors/security_cms.json has 22
frozen areas with their context and verdicts (F1, F2, F5, F6, S1 to S5), and
vectors/locator.json the extension datekeys.capsule with its envelope hidden
in a host, its locator sealed with tlock, the padding at the boundaries and
the rules of the addresses. The README of testdata describes all of it.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
internal/ed25519strict verifies the author signature of alg 1 with the
strict profile of the spec v0.11 draft (29.9): A canonical and not of
small order, checked with an encoding check and the table of the eight
points of small order, then crypto/ed25519 for S, R and the equation
without the cofactor. No arithmetic on points and no new module.
testdata/vectors/ed25519_strict.json has 18 signatures after the cases of
«Taming the many EdDSAs», built by testkit with arithmetic on the curve in
math/big, only for the vectors, which also checks the table of small
order. crypto/ed25519 accepts 11 of them that the profile rejects: the
eight points of small order and the non-canonical keys as A.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- README and README.es: specification 0.10, format 3 written and formats
1 to 3 read; BODY in the picture of a capsule; the CLI with folders,
-comment, -author, -no-mtime and decrypt into a new folder, with the
presentation of 29.7; EncryptFiles, Source and Sink in the library; the
metadata that format 3 hides, safe extraction, and the declared author
and comment that prove nothing; the fixtures, vectors and mutations of
format 3; 18 normative errors.
- CHANGELOG: the section of specification v0.10.
- docs/traceability.md: rows 29.2 to 29.7 and 29.5.1, and the rows that
format 3 changes (22, 23, 28, 29, 29.1, 31, 33, 39, 56, 57, 61 to 64,
67 to 70, 75 and 76); ERR_HEAD_INVALID in the error mapping; two
implementation decisions, the Sink and the width of the terminal.
- testdata/README.md: the nine fixtures of format 3 and their records,
the four new vector files, the mutation corpus of 209 cases with its
list of format 3 and the verdicts of the cases that open, and the two
bases of format 3 of the differential corpus.
- SECURITY.md: specification v0.10, and the head as untrusted input.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Open reads format 3 (spec 29.2 to 29.7, 63 steps 17 and 18): the
PRELUDE accepts VERSION 3, and the files go to a Sink.
- Sink: Begin with the validated head, Create for each file in the
order of the head, and Commit only after every check of step 17;
after any failure that follows a successful Begin, Abort, once. A
format 3 capsule without a Sink fails right after step 2 with
ErrSinkRequired, a caller error with no code, no failed step and no
request; a capsule of format 1 or 2 without dst fails there too.
- Step 17 in its substeps: the frame and the area, security and its
verdicts, which never fail, the head, the files filling CONTENT, the
SHA-256 of each file and the padding. A failure of age or a
plaintext whose length is not P prevails; otherwise the first
substep that fails decides, and a code other than ERR_INTEGRITY is
reported only after reading PAYLOAD_AGE to its end.
- The reads of BODY grow with the bytes received, never with AREA_LEN,
HEAD_LEN or a declared size (spec 57); a test measures it.
- A failure of the Sink is the caller's own error with ERR_INTEGRITY,
as one of dst is in formats 1 and 2.
- Opened gains Head, Verdicts, AreaLen and UnusableHeadExtensions.
- Test data: "version changed" sets VERSION 4, and the format 2 list
gains "format 2 time_only relabeled format 3", which fails at step
14, as section 64 of spec v0.10 lists: 126 cases, 89 of the spec.
The randomly built capsules keep their recorded bytes.
- testkit: Build writes format 3 and can edit the padded plaintext;
Head3, Body3, DiscardSink and MemorySink build and open BODY.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The reference moves to the DateKeys Protocol Specification v0.9, approved
by its author on 29 September 2026. Encrypt writes capsule format 2 only;
Open and Inspect read formats 1 and 2, and a format 1 capsule keeps the
verdict v0.8.2 gave it.
Format 2 (spec §22, §29.1, §31, §39):
- VERSION in the PRELUDE is the capsule format, capsule.Format; any other
value is ERR_UNSUPPORTED_VERSION at step 2.
- CONTROL_CBOR has the schema version of its format. Version 2 adds key 6,
payload_length (8 bytes, big-endian, at most L_MAX = 2^53 - 2^46), and
key 7, padding (1 bloque256, 2 reforzado); it is 103 bytes without
extensions, whatever L.
- The payload is the content padded with zeros to P = rule(L). Step 17
checks the length and the zeros, and Open writes only the first L bytes.
- INNER_ACCESS_AGE holds exactly 16 X25519 stanzas: 1 to 16 credentials,
and a dummy in each slot left, in a uniformly random order.
Writer rules (spec §62.1): EncryptOptions.Length is required and the
source must deliver exactly that many bytes; recipients that are not
canonical or of low order are rejected (agewrap.CheckX25519Recipient);
self-checks of the header, the control, INNER_ACCESS_AGE and PAYLOAD_AGE.
The CLI measures its input, takes -padding and reports the format.
Test data: seven format 2 fixtures, padding vectors checked against
math/big, format 2 CBOR vectors, and the mutation corpus in both formats
with the 22 cases of the third list of spec §64, built without randomness
by sealing the fixtures again with their known keys and nonces. The
format 1 fixtures are kept byte for byte and never regenerated; the
differential corpus keeps its 1825 cases and adds a block per format 2
fixture. The spec copy loses its "to be implemented" markers, and the
READMEs, CHANGELOG, traceability and testdata/README.md follow v0.9.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The second round of the formal review confirmed the nine corrections of
c57ed48 and asked for these, recorded in §76 as corrections 4 to 6 and
an editorial note:
- §72: an encoder MUST NOT write a registered extension in an object or
array it is not registered for; §54: a reader MUST NOT interpret the
data of a noncritical one it ignores for that reason. capsule.Encrypt
and accesskey.Encode take no Registry, so the application applies the
rule; their documentation and extension.Placement say so.
- §17 and §51 give the step-10 codes only for a directly supplied
release, as step 10 does; a network source discards a failing one at
step 9.
- Step 9 reports ERR_RELEASE_UNAVAILABLE and no other code, whatever the
failure of the source. provider/drand.Client keeps each relay's failure
as text only (errors.Join made a relay's ERR_ROUND_MISMATCH match with
errors.Is), and capsule.Open keeps only the text of a source error that
carries another code (a caller's source failing with
ERR_RELEASE_INVALID gave that code at step 9). A context that ended
stays detectable: Fetch now has a single failure path, so the canceled
and deadline cases are deterministic.
- TestExtensionPlacement covers the noncritical array of a .dkk: with
the object-blind extension.CheckNoncritical at step 9.a it fails.
- Editorial: §28.1 "analizan solo la cabecera age", one arrow at step 9,
two §76 introductions; §73 lines for release sources and placement.
- testdata/README.md says the corpus registers its extensions in both
arrays of every object; traceability, CHANGELOG and both READMEs
(integrity holds against whoever lacks the file keys, §27, §55.1)
follow. Spec dated 28 September 2026; new SHA-256 in spec/README.md.
No fixture or vector changes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A formal review of the whole v0.8.2 text found it approvable after
these corrections, recorded in §76 ("Correcciones de la revisión
formal"):
- §27 no longer calls header_binding the authenticity of PUBLIC_HEADER:
it binds the header to the opened control, never authorship or date
(§55.1); the age MAC only protects against whoever lacks the file key.
- §63 steps 9 and 10: a network source (relay, Release API, cache) MUST
verify every response and gives ERR_RELEASE_UNAVAILABLE at step 9 when
none verifies; the step-10 codes are for a directly supplied release.
The reference already behaved so; TestReleaseFromANetworkSource pins
both paths.
- §54 and §72: registrations declare the objects and arrays where an
extension may appear, and a known extension out of place counts as
unknown there. The reference gains the optional extension.Placement
interface, used at steps 4, 9.a and 14.
- §63 step 11 fixes the GT serialization hashed by H2 (kilic/kyber order)
with the frozen vector H2(e(G1, G2))[:16] = cb87319f..., shared as
testdata/vectors/tlock_ibe.json; H2-H4 are cited to drand/kyber.
- Step 5 makes the SEALED_CONTROL read mandatory, step 15 names
ERR_HEADER_BINDING, §21 makes capsule_id 16 CSPRNG bytes a MUST, §76
is made accurate (four dk1.json vectors, the §36 time_only rule, two
cases rewritten against the texts that really existed), and editorial
fixes in §5, §36, §55.1, §69.1 and §77. §73 lists the three new
decisions.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Amendment of the unreleased v0.8.2, recorded in §76 with its case: the
second implementation's phase-2 research found that tlock-js over
@noble/curves 1.9.7 accepts U re-encoded as c0 + p and a signature
x + p and returns the same file key, while the reference rejects both
(noble 1.9.7 differed from kilic on 5,615 of 41,686 encodings), and the
spec did not say which encodings are valid.
- §12.2 defines the canonical encoding of a BLS12-381 point (drand's
compressed ZCash form) and requires decoders to reject every other
byte string; §12.1 applies it to public_key.
- §63 step 10 applies it to the release signature (ERR_RELEASE_INVALID)
and step 11 defines the tlock stanza body U || V || W (96 + 16 + 16
bytes for Quicknet) with a canonical, non-infinity U (ERR_INTEGRITY).
- §64 gains ten mutations, exported to mutations.json (65 cases). The
signature x + p case uses published Quicknet round 1004, the first
after 1000 whose x allows x + p < 2^381. The reference already gave
every stated code and step.
Errors no longer copy text from tlock, kyber, age, drand or
kyber-bls12381. kyber's IBE error carried the candidate plaintext and r,
and with one bit of W flipped the message disclosed the real tlock file
key with that bit flipped. Every such place now uses a fixed reason with
its normative sentinel; TestTlockFailureDiagnosticsCarryNoSecrets fails
with the old wrapping.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Approved refinements, each recorded with its reproducible case in the
§76 v0.8.2 subsection:
- §69.1: layered error model with normative precedence (frame, type tag
and version, CBOR profile and CDDL, then fields with their own code in
ascending key order; across steps the §63 order decides), with a scope
paragraph for the optional steps 5, 6 and 8.
- §55.1: normative trust table per section (who can write it, from which
step it is bound, what it never proves); §72: security-relevant claims
go in CONTROL_CBOR or under a signature, .dkk data is advisory.
- §31/§54: extension arrays in strictly ascending unsigned byte order of
extension_id (one rule for order and uniqueness).
- Gaps a second implementation needed: §28.1 malformed age headers,
§15/§19 latest unlock time and dk1_ reading rules, §22/§23/§57 length
lower bounds, §63 step 8 tlock argument comparison and step 9 order,
§12.1 profile validation with the drand chain-hash formula, §74 table
of implementation limits.
Reference alignment: .dkk errors only at step 9.a (new
OpenOptions.AccessKeyFile, used by the CLI), CR/LF in dk1_ is
ERR_DATEKEY_INVALID, BODY_LEN 0 is ERR_INTEGRITY, nil identities are not
credentials, and AccessIdentity tries every identity on every stanza so
its verdict does not depend on their order. dk1.json gains three
vectors; every other testdata file is byte-identical.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Step 2b: package codec is rewritten without reflection or struct tags. A
strict Decoder accepts only the spec §58 profile, Unmarshal decodes,
re-encodes and compares, Peek reads the type tag and version, and Walk is a
bounded iterative helper for vectors and fuzzing. Every schema has its own
hand-written encoder and decoder that checks all CDDL rules before the
fields with their own error codes. github.com/fxamacker/cbor/v2 and
github.com/x448/float16 are gone; nothing replaces them. Valid objects
encode and decode exactly as before (1.34 million differential verdicts);
the invalid-input differences are documented in CHANGELOG and
traceability decision 12. A review found and fixed an access_policy check
that truncated to uint8.
Step 3: testdata gains vectors/cbor.json (generic and per-schema CBOR
vectors), vectors/mutations.json (the 55-case mutation corpus, replayable
offline), vectors/inspect_differential.json (1,825 fixed-seed mutations
with the Go verdict) and one inspect -json golden per fixture, all
regenerated byte-identically by genfixtures and documented in
testdata/README.md for second implementations.
Gate green with 90 s of fuzzing per target on all 15 targets; codec at
100 % coverage; pre-existing testdata byte-identical.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
dev