RUS PDF Editor

Utharn Buranasaksee

About this app

RUS PDF Editor is an application designed to enhance PDF document workflow on mobile devices. It's an extension of the desktop program rus-pdf and offers the following core features:

1. Document Viewing and Editing:
* PDF Viewer: Fast document display with support for zooming and smooth page scrolling.
* Text & Image Annotation: Text annotation tool with freely adjustable size and color. 1. Digital Signatures:
* Inserting images from the camera or photo library, with the Magic Wand feature to instantly remove the white background from signature or stamp images.
* Undo/Redo: A system for reversing edits for ease of use.

2. Advanced Digital Signing:
* Standard Compliance: Supports PAdES-B (PDF Advanced Electronic Signatures) standard, using .p12/.pfx certificate types.
* Long-Term Validation (LTV): Supports embedding Certificate Status Verification Information (OCSP/CRL), ensuring signatures remain verifiable even if the certificate expires in the future.
* Trusted Timestamping (TSA): Supports the standard RFC 3161 timestamping from Digicert to officially verify the signing time.
* Biometric Security: Enforces facial recognition (Face ID) or fingerprint authentication (Touch ID) before every signature.
* Invisible Signing: Supports invisible signatures for documents that prioritize data accuracy but do not require a visible signature on the page.

3. Validation (Verification System):
* Auto-Verification: Instantly verifies digital signatures in documents upon opening the file.
* Detailed Report: Displays signature validity, document integrity (including any post-signing modifications), and chain of trust.
* Built-in Root CA: Includes a set of root certificates (Thailand Private Root CA) for domestic use.

4. File and System Integration:
* File Sharing & Deep Links: Supports direct opening of PDF and certificate files (.p12) from other applications (e.g., email, LINE).
* Certificate Store: Secure management system for private certificates and Root CAs.
* Bilingual Support: Supports two languages ​​(Thai/English) with local date formatting (Buddhist Era/Gregorian Calendar).

What’s new

Fix bugs when signing