SIGNATURUM DESKTOP

Protect files where your team works.

Automatic SHA-256, offline queue, blockchain deposition and invisible Watermark in one desktop agent.

SHA-256 Offline / local-first Watermark Blockchain
1.5.0

macOS

Native desktop workflow with Apple Silicon / Metal acceleration for local Watermark.

Download for macOS
1.5.0

Windows

Online mode works without a GPU; offline Watermark can use NVIDIA CUDA acceleration.

Download for Windows
1.5.0

Linux

Desktop agent for workstations and controlled corporate environments, with NVIDIA acceleration when configured.

Download for Linux
Offline / local-first · Online / API

Choose where processing happens

Online and offline modes are intentionally separate. Teams can keep content local for hashing and local Watermark, or explicitly use Signaturum API when server processing is required.

Offline / local-first

SHA-256 and supported Watermark operations run on the workstation. Depositions can remain queued locally until connectivity returns. This reduces unnecessary transfer of source files.

Local queue and local SQLite remain on the device

Online / API

When the user selects an online operation, the required file or hash is sent over HTTPS to the Signaturum API. Access is limited by API-key scopes and account quotas.

Explicit action, authenticated API, dynamic quotas
macOS · Windows · Linux

Recommended configurations

macOS

  • macOS 13 or newer
  • Apple Silicon M1 or newer recommended for offline Watermark
  • 16 GB unified memory minimum; 24 GB+ recommended for larger files
  • FFmpeg + Poppler for local video/PDF processing

Windows

  • Windows 10/11 x64
  • 8 GB RAM for online mode; 16–32 GB recommended offline
  • NVIDIA GPU with 12 GB VRAM recommended for local Watermark
  • Current NVIDIA driver and CUDA-enabled PyTorch build

Linux

  • Ubuntu 22.04/24.04 or equivalent modern x86_64 distribution
  • 8 GB RAM online; 16–32 GB recommended offline
  • NVIDIA GPU with 12 GB VRAM recommended for local Watermark
  • FFmpeg, Poppler and current NVIDIA stack for full offline media support

Compliance-oriented data handling

Signaturum Desktop is designed to support data minimization, local processing and controlled transmission. These technical controls can help an organization implement its own legal and security obligations, but they do not replace the customer’s legal basis, notices, consent or transfer assessment where required.

Kazakhstan: personal-data processing and cross-border transfer are governed by the Law “On Personal Data and their Protection”, including Article 16 on trans-border transfer. Adilet
EEA: GDPR requires appropriate security measures and regulates international transfers; local processing and data minimization can reduce the amount of data that needs to leave a workstation. EUR-Lex
This page describes product architecture, not legal advice or a certification of compliance for any specific deployment.