Support for partial/header-only encryption, custom encrypted file storage, and caching behavior

[ragavendranbala-TSL]

Hi, thanks for this awesome plugin!

My app downloads a lot of media files (videos, images, etc.) from the server. These files can be quite large (sometimes 100MB+). The plugin encrypts and decrypts them whenever they’re accessed.

I have a few concerns and questions:

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1. Performance concern: Full-file encryption/decryption of large files

Encrypting and decrypting very large files frequently may affect app performance. Is there an option for: • Header-only encryption, or • Partial encryption, or • Any hybrid approach that avoids decrypting the entire file every time?

This would help significantly reduce overhead.

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2. Saving encrypted files to a custom directory

Is it possible to save encrypted files to a specific path (e.g., app-specific directory, external storage, etc.) instead of the default path used by the plugin?

If yes, how can it be configured?

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3. Behavior when frequently accessing the same encrypted file

If the app repeatedly opens the same encrypted file: • Does the plugin internally cache decrypted content? • If a cache is created: • Where is it stored? • Is the path accessible? • Is there a way to control, clear, or disable this cache?

Understanding this will help us optimize memory usage and performance when dealing with repeated file access.

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Additional context • Files are typically 50MB–200MB. • They might be accessed many times during a session. • I’m trying to avoid performance bottlenecks from repeated full decryption.

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Thanks in advance! Looking forward to your guidance.