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User-controlled decryption operations

Name: User-controlled decryption operations
Author: Erik Nellessen

Erik Nellessen

Emulates a smart card and lets you control the decryption operations

Education
FOSS
Free
No ads
No tracking

Android only

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This software enables you to transparently encrypt your Dropbox folder on your PC. It also lets you confirm the decryption operations on an Android smartphone, which is used as an NFC-enabled token. Additionally, it supports sharing files with other Dropbox users, while still encrypting the shared data. To really use the app, you also need to install the encrypting program on your PC.

Developer: Erik Nellessen
Source code: github.com/eriknellessen/user-controlled-decryption-operations
Added to AppCosmos: 10 October 2026
License: GPL-3.0-or-later