Documentation

This page explains what we publish, what is disclosed after each draw completes, and how a result can be checked without relying on our word alone.

Protocol summary

When you run a draw with us, you receive a formal certificate and an evidence pack showing exactly how the result was produced. These are yours to share with participants, auditors, or regulators. You do not have to rely on our word that the draw was fair, because the materials to check it independently are included.

The randomness behind every draw comes from an entropy block generated and certified by Eormen, then tested by three independent statistical suites before any draw uses it. The selection method is published in full as the Algorithm Specification Document and ensures that every possible combination of winners is equally likely. Every draw produces a certificate recording the portion of the randomness used, the submitted participant register, the locked execution-order register, the algorithm version, and the result.

The randomness used for your draw is fixed in sequence before the draw runs, so the outcome cannot be influenced once your participant register is locked. Independent verification relies on the evidence pack, the locked participant register, and the published Algorithm Specification Document rather than any public draw-chain service.

Verification model

What you can review before you run a draw

We publish the active entropy block identity, its validation results and verification values, and the current Algorithm Specification Document. This lets you review both the randomness source and the fixed published selection method before you run a draw.

What you receive when your draw completes

Each completed draw is accompanied by an evidence pack containing the certificate, the submitted participant register, the locked execution-order register, a human-readable participant register PDF, a copy of the exact bytes taken from the entropy block for that draw, the signed manifest, and the supporting files needed to confirm the result.

Billing region and currency

Your account has a billing region that controls the currency used for draw payments and ScirDom receipts. New accounts use United Kingdom · GBP by default. If your organisation should pay in another supported currency, change the account currency from the header selector or from your account profile before opening checkout.

The billing region selected at the time of payment is stored on the payment record and receipt. Changing your account currency later does not rewrite previous receipts or completed payment records.

Frequently asked questions

We use entropy blocks generated and certified by Eormen. Each delivered block contains a 1,073,741,824-byte entropy payload plus a 64-byte trailer, and the payload is tested by three independent statistical suites before it powers any draw.

Every entropy block is tested by three independent statistical suites before it powers a single draw. Two of the three suites are external standards: Dieharder (Duke University Physics Department) and NIST SP800-22 (US National Institute of Standards and Technology). The third is our own exhaustive validation that processes every byte. The results are published on the Transparency page and the full reports are available to download.

The evidence pack discloses the signed draw certificate, the participant register as submitted, the exact locked register used for execution, a human-readable participant register PDF, a copy of the exact bytes taken from the entropy block for that draw, and the supporting files needed to confirm the result against the published method.

A published selection method that guarantees every possible combination of winners is equally likely. The method uses rejection sampling to eliminate any bias in converting random data into participant positions. The full specification is published as the Algorithm Specification Document, available to download on the Algorithm page.

No. The participant list is locked before the draw runs. The draw takes the next portion of the entropy block in sequence, with no choice over which data is used. The algorithm is deterministic: given the same inputs, it always produces the same output.

The published documentation, Algorithm Specification Document, and validation results support third-party technical review without relying on our word alone.

We process participant names or identifiers provided by the draw organiser for the sole purpose of running and verifying the draw. This data is handled in accordance with our privacy notice and is not used for any other purpose.

No. ScirDom does not store card details or saved cards. Stripe handles card and supported device-wallet payment details for Stripe checkout, and PayPal handles PayPal checkout. ScirDom stores only the billing record, receipt, payment status, amount, currency, billing region, and processor reference needed to evidence the transaction.

Glossary

ASD (Algorithm Specification Document)

The published document defining the exact method we use to select winners. It is versioned so that any draw can be tied to the specific algorithm version used.

Block (Entropy Block)

A 1 GiB file of verified random data generated and certified by Eormen. Each block is tested by three independent test suites before activation. Blocks are identified by a unique ID (e.g. EORM-2026-0003).

Certificate and Manifest

The evidence pack contains a human-readable certificate (certificate.pdf), a machine-readable manifest (manifest.json), the submitted and locked participant registers, and a participant register PDF showing participant IDs beside visible names. Together they record the participant-register hashes, the disclosed entropy portion, the algorithm version, and the certified winner selection sequence.

Rejection Sampling

A technique used within the selection algorithm to convert random bytes into a number within a specific range without introducing any bias. It ensures every participant has exactly equal probability of selection.

Evidence Pack

The set of files issued after a draw completes, containing the exact bytes taken from the entropy block for that draw, the certificate, the signed manifest, and the supporting files required to confirm the result independently. The promoter receives the evidence pack and decides who to share it with.

Support

If you need support with draw setup, evidence-pack verification, billing, or a general question about ScirDom, contact us at [email protected] or send a message using the form below.

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