Privacy Policy

Privacy Policy for AES Message Encryptor for SMS

Last Updated : March 21, 2025

1. Introduction

Welcome to AES Message Encryptor for SMS ("the App"). Your privacy is of utmost importance to us. This Privacy Policy outlines how we handle your data and ensure complete security while using the App.

2. No Data Collection

This App is designed with privacy as a priority. It does not collect, store, share, or transmit any personal or sensitive user data. Specifically:

• No personal information (e.g., name, email, phone number) is collected.
• No messages, SMS content, or email text are stored or accessed by the App.
• No user activity or analytics data is collected.
• No background processes track your usage.

3. No Permissions Required

Unlike many other apps, AES Message Encryptor for SMS does not require any permissions to function. It does not request access to your contacts, messages, storage, or any other sensitive areas of your device. This ensures complete privacy and security for users.

4. Encryption Features

This App allows you to encrypt and decrypt messages using the Advanced Encryption Standard (AES) with a 256-bit key. The encryption and decryption occur locally on your device, ensuring that no data is shared externally.

• The password strength validator ensures users set a password with at least 6 characters, including one uppercase letter, one lowercase letter, one special character, and one digit.
• The 256-bit encryption key is derived from the password using SHA-256 hashing.
• The App supports both Cipher Block Chaining (CBC) and Electronic Codebook (ECB) modes for encryption.
• PKCS5Padding is used to ensure message length compatibility with encryption blocks.
• The CBC Explicit Initialization Vectors (IV) technique ensures enhanced security by discarding the first random block after decryption.
• The ECB mode is provided solely for academic purposes, as it is deterministic and less secure for real-world applications.
• A built-in Test Mode allows users to verify encryption with FIPS-197 standard AES test values.

5. No Advertisements

This App is completely free of advertisements. There are no third-party trackers, ad networks, or promotional content embedded in the App.

6. External Testing & Verification

Users can verify encryption outputs online using the following resources:

• AES Encryption Verification: http://extranet.cryptomathic.com/aescalc/index (Select ECB mode for testing)
• SHA-256 Hash Conversion: http://www.xorbin.com/tools/sha256-hash-calculator

7. Security Assurance

Since the encryption is entirely offline, your data remains under your control. The security of your encrypted messages depends on the strength of the password you set.

8. Changes to This Privacy Policy

We may update this Privacy Policy periodically. Any changes will be reflected with an updated effective date. Users are encouraged to review this policy occasionally.

9. Contact Us

For any inquiries or concerns regarding the App, feel free to contact:

• Email: support@appwiztech.com

By using this App, you acknowledge and agree to the terms outlined in this Privacy Policy.