Ed25519 signature.

Buyer translation: this reference page maps the mark to a tool, system, control, deployment, or evidence question. twisted-curve signature primitive · Ed25519 signature — a reference page in the Cryptography primitives register.

register 12 · Cryptography primitives· slug ed25519-signature· family atom 🪪 · best-fit emoji
Prepare evidence for Ed25519 signature review
01 ·

Promise. atom

The contract this mark binds — derived, not asserted.

Ed25519 signature — a reference page in the Cryptography primitives register.

Answers: What is Ed25519 signature in the Planisphere corpus library?

02 ·

What this is.

twelve marks · the evidence record's actual machinery · same construction · 200×200 · integer geometry · currentColor + brass-deep

Use. twisted-curve signature primitive.

Source. figure-8 elliptic curve + brass key dot.

Register. 12 · Cryptography primitives — one of the ten registers of the PLANiSPHERE corpus library.

03 ·

See it work.

Evidence record you can check — not code you have to trust.

Planisphere measures your tool deployment against Ed25519 signature and seals the result into a signed, Merkle-rooted evidence record. The grade recomputes on your own hardware; the model state never crosses the boundary.

See how a record is checked →See how a record is checked
04 ·

The board that carries this.

Related marks, and the surface this one funnels to.

Ed25519 signature is measured into the same evidence record as every other mark in the Cryptography primitives register. The vendor trust packet turns that measurement into a buyer-ready proof packet at /trust-packet.

Base32 reg 12 · alphanumeric encoding · 5-bit chunks CID reg 12 · content identifier · multihash with code prefix Content-addressable store reg 12 · addressed by what it is, not where it lives Hash chain reg 12 · each block carries the previous block's hash
05 ·

Routes here from.

Where this mark is referenced in the Planisphere surface.

About

Any internal link in the Planisphere site that names "Ed25519 signature" canonicalises here.

06 ·

Sibling marks. Cryptography primitives

Same register · same construction.
SHA-256 digest
collapsing variable input to a fixed 64-char hash
wave of varying bars → arrow → 4 brass output bars
Merkle root
the single brass node atop the tree
large brass root + descending branches + 4 leaves
Inclusion proof
path from one leaf to the root
tree with one path drawn in brass
CID
content identifier · multihash with code prefix
stacked rectangles representing hash prefix + content
Hash chain
each block carries the previous block's hash
5 linked blocks with brass continuation arrows
Public key
open teeth · meant to be shared
key ring + shaft + outward teeth + brass ring
Private key
sealed teeth · never leaves the holder
key with inward teeth + brass sealed ring + lock
Nonce
a number used once · single-use entropy
a single brass token + diagonal slash through it
Timestamp signature
clock face + a signature mark
circle + hands + brass swirl beneath
Base32
alphanumeric encoding · 5-bit chunks
compact grid of cells, brass-filled subset
Content-addressable store
addressed by what it is, not where it lives
stack of blocks each labeled with its hash prefix

Prepare evidence for Ed25519 signature review.

First evidence record within 21 days of access · re-runs in a single business day.

Answer a buyer trust objection