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Version: 2.3.0

Sign digital by USB Token

Creation Date: Oct 15, 2025
Created By: VNPT eContract's team

The USB Token digital signing feature allows users to securely and safely sign electronic documents. The USB Token stores private cryptographic keys offline, protecting them from unauthorized access and ensuring the authenticity and integrity of documents. Users can easily carry and use the USB Token to sign documents on any computer with a USB port, providing high flexibility for electronic transactions.

Verify information before using USB Token digital signature​

Before using the USB Token for digital signature, the signer needs to:

  1. Check and install the digital signature tool (Plugin) provided by the chosen digital signature service provider.
  2. Verify and select the correct digital signing method "USB Token Digital Signature" on the VNPT eContract system.

1. Guide to verify and install the signature plugin: VNPT-CA plugin​

VNPT-CA plugin is additional software that add digital signing functionality to web applications.

  • Option 1: Visit https://smartca.vnpt.vn/download, scroll to "PLUGIN INSTALLER", choose the appropriate version for your computer's operating system to download
    • VNPT CA-Plugin software installation for Windows: Download
    • VNPT CA-Plugin software installation for Mac OS: Download
Download VNPT-CA plugin
  • Option 2: Users can directly download here
Note
  • After installing the VNPT-CA Plugin, you need to restart your computer to ensure the Plugin functions correctly.

2. Check and select "USB Token digital signature" method​

Update digital signing method

Access the Account management screen, update the information, select the "USB Token Digital Signature" method, and save the updated information. Additionally, users can switch between different signing methods directly on the Sign / Approve document screen.

Select digital signing method

Digital signature of documents using USB Token​

1. Signing a single document​

Signing a single document using VNPT-CA plugin​

USB Token signature for single document

Advanced USB Token signature for single document using VNPT-CA plugin​

Advanced USB Token signature for single document

2. Signing multiple documents​

Signing multiple documents using VNPT-CA plugin​

USB Token signature for multiple documents

Advanced USB Token signature for multiple documents using VNPT-CA plugin​

Advanced USB Token signature for multiple documentst

Rejecting document signature​

1. Rejecting the signature of a single document​

Rejecting USB Token signature

2. Rejecting the signature of multiple documents​

Rejecting USB Token signature