Share this QR code with the recipient:
Verification code (should match with recipient):
Confirm Transaction
Verification code (should match with provider):
Account Details
Data Management
Manage your time banking data:
Account Management
Danger zone: The following actions cannot be undone.
Transaction Verification
Verify the authenticity of time banking transactions using our digital signature verification tool.
App Settings
Manage your Time Exchange application settings:
About
Time Exchange v1.0
A secure peer-to-peer time/gift recording system built on trust and verification. Here's how it works:
Two-party agreement: Each transaction requires verification by both the provider and receiver.
Digital signatures: Transactions are cryptographically signed using ECDSA with SHA-256 to ensure authenticity.
Verification codes: Both parties confirm transactions with matching verification codes.
Tamper resistance: Once signed, any attempt to modify transaction details will invalidate the signature.
Strong encryption: All data is encrypted using AES-GCM 256-bit encryption with PBKDF2 key derivation.
Salt generation: Unique cryptographic salts are generated for each user to prevent rainbow table attacks.
Local storage only: Data never leaves your device unless you explicitly export it.
Complete privacy: No server storage or third-party tracking - your data remains in your control.
License
Time Exchange is free software released under the GNU General Public License v3 (GPL-3.0).
Copyright © 2025 Robert Zamperoni
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
Disclaimer
Use At Your Own Risk: This software is provided "as is", without warranty of any kind, express or implied. The original author and contributors are not liable for any damages, losses, or other consequences that may arise from the use of this software.
The authors make no representations about the suitability, reliability, availability, timeliness, security or accuracy of the software. The software is used strictly at your own risk. If you discover a vulnerability or problem with the software, please contact the author immediately.
Security Notice
- Use this on a private device
- Clear browser data when using on shared devices
- Never enter sensitive personal information beyond basic contact details