VaultBridge

    VAULTBRIDGE

    Secure File Sharing

    VAULTBRIDGE
    Security Architecture

    Security Architecture

    VaultBridge is designed so files remain private, encrypted, and outside direct platform control. Trust is enforced by system design, not just policy text.

    Core Security Principles

    Client-Side Encryption

    Files are encrypted in the browser before transfer. Raw file payloads are never uploaded in plaintext.

    Zero-Knowledge Architecture

    VaultBridge cannot decrypt file contents because decryption keys are generated and retained client-side.

    Temporary Storage

    Vault payloads are short-lived by default and are removed after lifecycle conditions are met.

    Minimal Data Collection

    No account is required for core flows and no behavioral profiling is performed for product usage.

    Architecture Overview

    Encryption occurs at the client boundary. Infrastructure only receives encrypted payloads and lifecycle metadata.

    [Client Browser]
   |  (Encrypt + key derivation)
   v
[TLS 1.3 Transport]
   |
   v
[VaultBridge API]
   |  stores encrypted chunks + TTL metadata
   v
[Ephemeral Storage Layer]
   |
   v
[Recipient Browser Decrypts Locally]

    Key Generation Process

    1. 01Generate per-session entropy in browser runtime.
    2. 02Derive encryption material from access factors (e.g., code + random salt).
    3. 03Use symmetric encryption for payload chunks (AES-256 class model).
    4. 04Store only encrypted payload and lifecycle metadata server-side.
    5. 05Discard runtime key material once transfer/decryption flow ends.

    File Lifecycle

    1.User selects file in browser.
    2.Client encrypts payload and metadata locally.
    3.Encrypted blob is transferred over TLS.
    4.VaultBridge stores encrypted payload with TTL metadata.
    5.Recipient accesses vault with secure link and code.
    6.Vault auto-destructs on expiration, burn-on-read, or manual destruction.

    Encryption Model

    Encryption Standard
    AES-256 class symmetric encryption model
    Transport Security
    TLS 1.3 for in-transit protection
    Key Management
    Ephemeral, client-generated session keys
    Access Model
    Link-based vault access + retrieval verification

    Data Retention Policy

    VaultBridge does not permanently store files. Vault data is removed after expiration or destruction events. The platform is optimized for temporary transfer, not long-term archives.

    Auto-Destruct Logic

    • Time-based expiration is enforced via TTL metadata.
    • Burn-on-read deletes vaults after configured successful retrievals.
    • Manual destruction invalidates active access immediately.
    • Cleanup workers remove expired artifacts from storage.

    What VaultBridge Cannot Do

    • Read file contents in plaintext
    • Decrypt encrypted payloads without user-held key material
    • Build user identity profiles from account systems
    • Retain files indefinitely outside configured lifecycle controls

    Transparency statement: privacy guarantees are architecture-driven. Operational policy follows the constraints established by the system design.

    Privacy by Architecture

    Explore the reasoning and product philosophy behind these technical choices.