OPEN CRYPTOGRAPHIC ARCHITECTURE

Security architecture explained simply

How DryVault defends your passwords, private files, and secret notes. Learn how authenticated encryption, key derivation, and local sandboxing protect you every day.

#AES-256-GCM Cipher #PBKDF2-HMAC-SHA-256 Key Derivation #Local On-Device Sandboxed Storage #In-Memory RAM Zeroing on Lock #Isolated Google Drive Cloud Sync

MILITARY-GRADE ENCRYPTIONUSER PROTECTION STANDARD

AES-256-GCM Cipher

Every credential, private photo, document, and note is secured using authenticated AES-256-GCM encryption. This standard provides both ironclad secrecy and built-in tamper detection.

What this means for your daily privacy:

What this means for you: Your secrets are protected with the same cryptographic standard trusted worldwide by banking and defense institutions. Every record has an unforgeable cryptographic seal that alerts the app if anyone has altered your files.

Key Security Guarantees:

Authenticated encryption protects both confidentiality and data integrity

Unique cryptographic Initialization Vector (IV) generated for every single save operation

128-bit authentication tag ensures corrupted or altered files are instantly rejected

Zero unencrypted data is ever written to your device's physical storage

BRUTE-FORCE RESISTANTUSER PROTECTION STANDARD

PBKDF2-HMAC-SHA-256 Key Derivation

Your Master PIN never encrypts your data directly. Instead, it serves as the root seed for an intensive cryptographic calculation executed exclusively on your device's processor.

What this means for your daily privacy:

What this means for you: Your Master PIN is never saved anywhere. Instead, your phone runs over 100,000 mathematical iterations with a unique device salt to unlock your vault. This makes it impossible for automated cracking tools to guess your PIN.

Key Security Guarantees:

Master PIN is mathematically stretched locally on your physical processor

Device-unique cryptographic salt prevents pre-computed dictionary attacks

Over 100,000 calculation iterations slow down brute-force cracking to a crawl

Zero PIN escrow: no one, not even our developers, can recover your PIN if forgotten

OFFLINE-FIRST PRIVACYUSER PROTECTION STANDARD

Local On-Device Sandboxed Storage

By default, 100% of your data lives exclusively in your mobile device's private app sandbox. DryVault requires no remote accounts, no cloud setup, and functions seamlessly with zero internet connection.

What this means for your daily privacy:

What this means for you: Other apps on your phone cannot access or view your vault. Even if someone extracts your phone's internal storage chip, they cannot read your data without your Master PIN.

Key Security Guarantees:

Completely isolated within Android's protected application sandbox

Functions 100% offline forever without requiring a subscription or account

Zero central database: there is no master company server that could ever be breached

You have absolute ownership and custody of your encrypted data files

VOLATILE MEMORY PROTECTIONUSER PROTECTION STANDARD

In-Memory RAM Zeroing on Lock

The moment you lock your vault or auto-lock fires, all decryption keys and plaintext credentials in active memory are actively overwritten with zeros and erased.

What this means for your daily privacy:

What this means for you: When you step away from the app, DryVault doesn't just hide behind a screen; it actively shreds decryption keys from device RAM. If you hand your phone to someone, your secrets are mathematically sealed.

Key Security Guarantees:

Configurable auto-lock timers from 1 minute to 1 hour, or instant background lock

Decryption keys in memory are actively overwritten with zeros upon locking

Automatic clipboard clearance purges copied passwords after 30 seconds

Protects against cold-boot memory dumps and physical device inspection

SANDBOXED CLOUD PERSISTENCEUSER PROTECTION STANDARD

Isolated Google Drive Cloud Sync

If you want persistence across multiple devices, DryVault backs up directly to your personal Google Drive account using a restricted, hidden application sandbox.

What this means for your daily privacy:

What this means for you: DryVault is strictly quarantined to its own hidden app folder. It cannot see, read, or touch your personal Google Drive documents, spreadsheets, or family photos. All files uploaded are already encrypted into unreadable ciphertext.

Key Security Guarantees:

Uses Google's strict AppData scope: completely isolated from personal Drive files

Data is encrypted locally on your phone before uploading to Google Drive

Google receives only encrypted blobs (.enc); no DryVault company servers exist in between

Revocable anytime with one tap from the app or your Google Account settings

Audit the architecture on your device

DryVault operates with zero server intermediaries. Install version 1.0.4 and take full control of your personal security.

Get DryVault v1.0.4 Read Zero-Knowledge Privacy Policy