[media-types] Re: [IANA #1457100] application/vnd.ma jikah.mjksig registration request

On Mon, Aug 10, 2026 at 6:58 PM Amanda Baber via RT <
[email protected]> wrote:

> > Name: Josef Elijah Delos Santos Fabian
> >
> > Email: [email protected]
> >
> > Media type name: application
> >
> > Media subtype name: vnd.majikah.mjksig
> >
> > Required parameters: N/A
> >
> > Optional parameters: NA
> >
> > Encoding considerations: binary
> >
> > The format begins with a raw 12-byte binary header containing magic
> > bytes (0x4D 0x4A 0x4B 0x53 0x49 0x47), version byte, reserved byte,
> > and a big-endian uint32 payload length integer. It may contain
> > arbitrary binary octets, requiring binary-safe transport or
> > 8bit/base64 transfer encoding on text-only channels.
>

This isn't necessary in the registration template since the published
specificaton is linked, and I presume this material is repeated there.


> > Security considerations: Active/Executable Content: The media type
> > does not contain active or executable content. Files are parsed
> > strictly as static signature envelopes and data structures. Parsers
> > must ensure input validation on header length fields to prevent buffer
> > allocation attacks or out-of-bounds reads.
> >
> > Privacy and Integrity: The format inherently provides integrity,
> > authenticity, and non-repudiation services through hybrid classical
> > (Ed25519) and post-quantum (ML-DSA-87) cryptographic signatures.
> > Confidentiality is not provided by the envelope format itself;
> > sensitive files must be encrypted externally or in transit (e.g., via
> > TLS).
> >
> > JSON Usage: The binary header wraps a UTF-8 JSON structure
> > (MultiSigEnvelope). standard JSON parser security considerations apply
> > (e.g., handling unexpected keys gracefully, avoiding resource
> > exhaustion on deep nestings or malformed structures).
> >
> > Compression/Containers: The format does not use compression or
> > container formats (such as ZIP).
> >
> > External Links: The format does not rely on external URI referencing
> > to execute baseline parsing or signature verification.
> >
> > Interoperability considerations: Interoperability relies on strict
> > adherence to the 12-byte big-endian header structure, UTF-8 parsing of
> > the payload JSON, and deterministic canonicalization ("majik-
> > signature-v1:" + JSON.stringify(...)) prior to signature evaluation.
> > Implementations across different processor architectures must strictly
> > enforce big-endian byte order handling for integer fields.
>

Were there prior versions of this format that are incompatible with the
version being registered?


> > Published specification: https://github.com/Majikah/majik-
> > signature/blob/main/MJKSIG_SPEC.md
> >
> > Applications which use this media: Used by the majik-signature SDK,
> > CLI tools, document signing applications, and cryptographic integrity
> > platforms to generate, attach, and verify hybrid classical and post-
> > quantum digital signatures for files and software packages.
> >
> > Fragment identifier considerations: N/A
> >
> > Restrictions on usage: N/A
> >
> > Provisional registration? (standards tree only): No
> >
> > Additional information:
> >
> > 1. Deprecated alias names for this type: N/A
> > 2. Magic number(s): 0x4D 0x4A 0x4B 0x53 0x49 0x47 (MJKSIG in ASCII) at
> > offset 0
> > 3. File extension(s): mjksig
> > 4. Macintosh file type code: N/A
> > 5. Object Identifiers: N/A
> >
> > General Comments: Majik Signature is a hybrid post-quantum content
> > signing and verification library for the Majikah ecosystem. Built on
> > top of Majik Key, it produces tamper-evident, forgery-resistant
> > digital signatures for any content — plaintext, JSON, PDFs, audio,
> > video, Office documents, or raw binary — using a dual-algorithm
> > architecture that combines classical Ed25519 with post-quantum ML-DSA-
> > 87 (FIPS-204).
> >
> > Person to contact for further information:
> >
> > 1. Name: Josef Elijah Fabian
> > 2. Email: [email protected]
> >
> > Intended usage: COMMON
> >
> > N/A
> >
> > Author/Change controller: Josef Elijah Fabian / Majikah Solutions OPC


-MSK

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