Noira vs. Chaindoc: Is Chaindoc Actually On-Chain?
Chaindoc anchors only a hash of the finished document to a blockchain (SKALE Calypso) — the document itself is stored in standard AWS S3 with server-side encryption, and Chaindoc holds the keys. Noira runs its encryption and storage natively on-chain (ICP), and no party can decrypt documents unilaterally.
Does Chaindoc store documents on the blockchain?
No.
Only a SHA-256 hash of the finished PDF is written to SKALE Calypso, for tamper-evidence. The document itself lives in conventional cloud storage (AWS S3).
Can Chaindoc read my documents?
Yes, technically.
Chaindoc holds both the S3 encryption keys and the per-signer ECDSA signing keys. The platform is therefore in a position to decrypt stored documents and to produce signatures on a signer's behalf.
Is Chaindoc's CSA STAR certification independently audited?
No.
It is a Level 1 self-assessment (CAIQ), not a third-party audited certification. Self-assessment is a vendor-attested questionnaire, not an independent audit.
NOIRA VS. CHAINDOC
| CRITERION | CHAINDOC | NOIRA |
|---|---|---|
| What's actually on-chain | Only a SHA-256 hash of the finished PDF (SKALE Calypso) | Encryption and storage native on-chain (Internet Computer Protocol) |
| Encryption model | AWS S3 server-side encryption, Chaindoc holds keys | VetKeys threshold cryptography, no single party can decrypt |
| Compliance verification status | CSA STAR Level 1 self-assessment (CAIQ), not third-party audited | On-chain verifiable, threshold cryptography guarantees |
Chaindoc writes a SHA-256 hash of the finished PDF to SKALE Calypso and stores the document itself in AWS S3, with Chaindoc holding both the S3 encryption keys and the per-signer ECDSA signing keys. Its CSA STAR attestation is a Level 1 self-assessment (CAIQ), not a third-party audited certification. Noira runs encryption and storage natively on the Internet Computer Protocol using VetKeys threshold cryptography, so no single party — including Noira — can decrypt a stored document unilaterally, and the cryptographic guarantees are verifiable on-chain.
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