7. SafeQuard (What we support)

7.1. Currently

This table shows the compatibility for the current implementations

Table 7.1 Supported Table

From/To	Outlook	Gmail (Chrome Web)
Outlook	Supported	Supported
Gmail (Chrome Web)	Supported	Supported

Table 7.2 List of Potential Table

Mode	Status	Pros/Cons
Gmail (Chrome Extension Desktop)	✓	Full Control: Runs in a browser and can load any JavaScript libraries, WASM modules, or third-party packages. Gmail API Integration: Use OAuth for authentication and the Gmail API to read, modify, or send emails. Cross-Platform: Works only on Google Chrome Browser.
Outlook (Desktop App/Web)	✓	Full Control: Runs in a browser/Desktop App and can load any JavaScript libraries, WASM modules, or third-party packages. Outlook API Integration: Use MSAL for authentication and the Office API to read, modify, or send emails. Cross-Platform: Works only on Windows Desktop App and browser.
Progressive Web App (PWA)	✓	Full Control: Runs in a browser and can load any JavaScript libraries, WASM modules, or third-party packages. Gmail API Integration: Use OAuth for authentication and the Gmail API to read, modify, or send emails. Outlook API Integration: Use MSAL for authentication and the Office API to read and process emails. Custom UI: Build a fully user-friendly interface without the restrictions of Gmail add-ons. Cross-Platform: Works on both Android and iOS, offering a near-native experience. Installation: Users can “install” the PWA on their home screens for a native app–like feel.

7.2. Potentially

Table 7.3 List of Potential Table

Mode	Status	Pros/Cons
Gmail (Chrome Mobile Extension)	✗	No Extension Support: Official Google Chrome on mobile does not support extensions. Therefore, features such as loading JavaScript files, using JSZip, WebAssembly, or accessing the Gmail API are unavailable. Third-Party Alternatives: Some Chromium-based browsers on Android—like Kiwi Browser or Yandex Browser—do support extensions. However, their behavior and compatibility may differ from desktop Chrome.
Gmail (Gmail App)	✗	Restricted UI Framework: Limited to the Card Service (no custom HTML/CSS/JS). Limited Client-Side Scripting: Cannot run arbitrary JavaScript or load custom libraries. No WebAssembly Support: WASM modules are not supported. Sandboxed Environment: Strict security policies limit external resources.
Native Mobile App	✗	Platform-Specific Capabilities: Leverage native frameworks (e.g., Swift for iOS, Kotlin/Java for Android) to access full device features. Optimized Performance: Integrate encryption libraries, WASM modules (via bridging techniques), and JS libraries using hybrid frameworks or web views. Advanced Gmail API Integration: Incorporate Gmail’s API while taking advantage of full native UI components. Enhanced User Experience: Offers a more responsive and polished interface compared to web-based solutions.

Table 7.4 Currently Supported Modes for Outlook

Platform	Type	Support for Enc	Support for Dec	Remarks
Windows	Browser App	✅ ✅	✅ ✅	Works for both Outlook Desktop New and Classic
Android	Browser [1] App	✅ ❌	✅ Content Only	More testing required Needs debugging [2]
iOS	Browser [1] App	✅ ❌	✅ Content Only	Decryption of attachment size limited to 5mb
iPadOS	Browser [1] App	✅ ❌	✅ Content Only	Decryption of attachment size limited to 5mb
macOS	Browser App	❌ ❌	✅ ❌	Decryption of attachment size limited to 5mb Requires further development

Notes

[1] (1,2,3)

Browser has to be in Desktop Site mode for the add in to work

[2]

Android App decryption has a bug that after decrypting 1 email it gets stuck on the decrypted email viewing (workaround, restart the app to decrypt another message)