KeePassDX v4.5.2 - Biometric Secure Password Manager

Technical Specifications & System Requirements

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KeePassDX for Android — Official Open-Source Encrypted KDBX 4 Password Vault APK

KeePassDX is the premier, enterprise-grade free and open-source password manager, cryptographic credential vault, and TOTP authenticator developed by Jeremy Quentin (J ببK) for Android smartphones, tablets, and security professionals. Engineered to deliver uncompromised digital sovereignty, KeePassDX operates natively with standard KeePass KDBX 3.1 and KDBX 4 database formats—featuring military-grade cryptographic ciphers (AES-256, ChaCha20, Twofish), Argon2id key derivation, Magikeyboard secure input to prevent clipboard sniffing, hardware YubiKey 2FA challenge-response, Android Autofill framework integration, and a gorgeous Material Design interface with zero internet permissions.

🌟 Core Architecture & Engineering Highlights

KeePassDX is engineered from the ground up to provide maximum cryptographic resistance against brute-force attacks and mobile memory extraction.

Native KDBX 4 Format & Cryptographic Cipher Suite

KeePassDX reads and writes uncompromised standard KDBX 4 password database files. Your entire credential database—including usernames, passwords, custom fields, file attachments, and notes—is encrypted using industry-standard symmetric ciphers: AES-256, ChaCha20, or Twofish. Key derivation is fortified using modern memory-hard algorithms (Argon2d, Argon2id, and AES-KDF) that render GPU and ASIC-accelerated password cracking mathematically infeasible.

Magikeyboard & Android Autofill Service

Prevent malicious background apps from logging your passwords. KeePassDX integrates an innovative Magikeyboard virtual keyboard: instead of copying passwords to the Android system clipboard (where snooping apps can read them), Magikeyboard types credentials directly into input fields. It also features full native support for the Android Autofill Framework for seamless 1-tap browser and app logins.

Hardware Security Keys (YubiKey NFC / USB-C Challenge-Response)

For high-security operations, KeePassDX supports YubiKey and OnlyKey hardware security keys via USB-C or NFC (Near Field Communication). Using HMAC-SHA1 challenge-response authentication, unlocking your password database requires physical possession of your hardware security key alongside your master passphrase.

⚙️ Key Capabilities & Workflow Features

KeePassDX delivers an exhaustive set of security management and productivity tools.

1. 100% Offline Architecture & Cloud Freedom

KeePassDX contains ZERO internet permissions in its package manifest. You maintain 100% control over where your .kdbx vault file is stored: keep it strictly on device storage, or synchronize it across PC and mobile using decentralized tools like Syncthing, Nextcloud, or WebDAV.

2. Integrated TOTP Two-Factor Authenticator

Consolidate your authenticator apps into one secure vault. KeePassDX includes an integrated Time-Based One-Time Password (TOTP) token generator, displaying 6-digit 2FA codes with auto-copy and countdown timers.

3. Advanced Password & Passphrase Generator

Generate cryptographically strong credentials: create complex random alphanumeric passwords, customizable hex strings, or memorable multi-word Diceware passphrases tailored to specific website password policies.

4. Biometric Quick Unlock & RAM Scrubbing

Unlock your vault instantly using your smartphone's biometric fingerprint or face authentication. Sensitive cryptographic keys are automatically purged from active RAM when the app is minimized or after a configurable inactivity timeout.

🚀 Performance Benchmarks & Resource Impact

Benchmarking KeePassDX cryptographic security and memory footprint against commercial password vaults on an Android 14 device:

📊 Comprehensive Head-to-Head Comparison Matrix

📋 Technical Hardware & System Requirements

KeePassDX is optimized for all modern Android smartphones and tablets:

🛠️ Step-by-Step Installation & Quick Setup Guide

Follow this guide to install and configure KeePassDX on Android:

1. Downloading and Installing KeePassDX

1. Download the verified KeePassDX APK package (keepassdx-password-manager-v4.x.x.apk) from FileCobra.
2. Tap the file to install and open KeePassDX.

2. Creating or Opening a KDBX Database

1. Tap Create Database (or Open Database if migrating from PC KeePass/KeePassXC).
2. Set a strong Master Passphrase and select Argon2id for maximum cryptographic protection.

3. Enabling Biometric Unlock & Autofill

1. In Settings, enable Biometric Unlock for instant fingerprint access.
2. Navigate to Android Settings > System > Autofill service and select KeePassDX for 1-tap browser logins!

🔒 Security, Privacy & Open-Source Integrity Analysis

KeePassDX represents the gold standard in cryptographic integrity and privacy:

• 100% Free & Open Source: Licensed under GNU GPLv3 with complete public source code inspection on GitHub.
• Zero Internet Permissions: Declares zero network access permissions; mathematically impossible to leak credentials.

❓ Frequently Asked Questions (FAQ)

Is KeePassDX compatible with KeePassXC on Windows, Mac, and Linux?

Yes! KeePassDX uses standard .kdbx (KDBX 3.1 / KDBX 4) database files, allowing you to seamlessly share and synchronize your password vault across Android, Windows, macOS, and Linux.

Does KeePassDX have access to the internet?

No! KeePassDX contains zero internet permissions in its package manifest. Your credentials are saved strictly locally on your phone or synced via your own cloud tools (like Syncthing or Nextcloud).

What is Magikeyboard in KeePassDX?

Magikeyboard is a dedicated virtual keyboard included with KeePassDX that allows you to type your usernames, passwords, and TOTP codes directly into apps without copying them to the system clipboard.

Key Highlights & Features

• Zero-Knowledge KDBX3 & KDBX4 Vaults
• Biometric Fingerprint & Face Unlock
• Integrated TOTP Two-Factor Authenticator
• Magikeyboard Secure Autofill Method
• Audited Cryptography with Zero Internet Permission

KeePassDX UI & Interface Screenshots

How to Install & Verify KeePassDX

KeePassDX Version History & Build Numbers

Every KeePassDX build FileCobra has mirrored, newest first. Match the build number against the copy you already have to confirm whether you are up to date.

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Frequently Asked Questions & Verification Guide