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SaudaFlow
Trust the math, not us

Zero-knowledge, by construction.

Your leads, your keys, your data. We literally can\'t read it. Here\'s the architecture, the audit trail, and every ADR we\'ve signed so you don\'t have to take our word for it.

Tenant Master Key

Derived client-side from a passphrase via scrypt (N=32768, r=8, p=1). SaudaFlow never sees the passphrase or the unwrapped TMK.

Per-record DEK

Every lead, contact, note, deal, document blob gets its own AES-256-GCM key wrapped by the TMK. AAD binds ciphertext to tenant + record_type + record_id.

Blind-index search

HMAC-SHA256 blind indexes for phone (E.164) and email (lowercased). Free-text search runs client-side on decrypted local data.

Mumbai residency

Hostinger Mumbai VPS for compute. Backblaze B2 Mumbai for cold storage. Mumbai region pinned by contract.

WORM audit trail

Append-only, Ed25519-signed event log for every access. Admissible in a RERA hearing. Tenant-readable, SaudaFlow-readable for metadata only.

DPDP-aligned

Data Principal Rights workflow built in: access, correction, erasure, portability. Consent ledgered. Breach notification automated.

What we see vs. what we don\'t.

Field We see We don\'t
Lead namecipher
Lead phoneblind-indexed hashplaintext
Deal valuecipher
Call transcriptcipher
Payroll salarycipher
Sale deed PDFcipher
Tenant IDplaintext
Seat count, plan, billingplaintext
Request counts, latencyplaintext

Architecture decisions on the record.

Every cryptographic decision is committed to an ADR. We don\'t change the contract quietly.

ADR-0026
Per-tenant API rate-limiting (token bucket)
ADR-0027
Blind-index HMAC schema versioning
ADR-0028
B2 multipart upload retry semantics
ADR-0029
Mobile passphrase recovery via BIP-39
ADR-0030
Recording consent envelope (TRAI v2)
ADR-0031
Buyer portal session key derivation
ADR-0032
Workflow engine PLAINTEXT_WINDOW contract
ADR-0033
Payroll bank-detail encryption envelope
ADR-0034
On-device AI model bundle integrity check
ADR-0035
iOS native CallDirectory + Apple Sign In
ADR-0036
Outlook OAuth PKCE + Graph scopes
ADR-0037
2FA TOTP recovery codes + hCaptcha

Read the full whitepaper, including threat model and key rotation policy.

Read the SaudaFlow privacy whitepaper
Security — zero-knowledge architecture, audit trails, ADRs · SaudaFlow