Secret Message Exchange vs Secret Text

Have you ever experienced that the messages between you and your family, friends (partners) on SNS somehow are seen by someone else? If you have such a concern, you can solve the problem if you can exchange messages in a way that only you and your partners can understand. By using this application, a sender can embed a message in an image (photo) and posts it on an SNS, then the receiver can restore and read the embedded message from the image. Since the sender and receiver of the message use the same "key image" to embed (encrypt) and restore (decrypt) the message into/from the key image, the sender and receiver need to register the same image as the key image in advance in this application. One sample key image is registered in this application. So, it is recommended that you try it once by using the sample key image and experience what it feels like. [Note] - Only landscape image with aspect ratio 4: 3 can be used. - The key image to be registered for each of the sender and receiver must have the same image size and file size. If you do not have the exact same key, you can not decrypt the message correctly. - In the case of the image sent by e-mail, the image size may be reduced due to limitation of the e-mail attachment file size, so please pay attention to the file size when you use email. Overview of the operation follows; == Create an encrypted message == 1. Launch this application and tap "Encryption" button. 2. Select a key image. If you use key images other than samples, In-app Purchase is required. 3. Type your message. 4. Tap "Encrypt" button. 5. The message is embedded in the key image and saved in the Photo Library, so post it using SNS applications or email. == Decrypt an encrypted message == 1. Save the image received by SNS applications or email to Photo Library. At this time, it needs to be saved with the image size and file size as it is sent. 2. Open this application and tap "Decryption" button. 3. Select an image from the Photo Library, and select the corresponding key image as well. 4. Tap "Decrypt" button to decrypt and display a message. [Note] - The displayed message is an image. If you want to save the message, please take a screenshot and save it as an image. - Depending on the key image used, noise (black dots) may be displayed on the message screen. We are happy if you are interested in this application. Thanks!

Secret Text is a secure text translator, not a chat app. Download free and use one contact with unlimited encryption, decryption and fingerprint verification. A one-time Pro purchase unlocks unlimited contacts. No trial or subscription is required. It encrypts your plaintext into ciphertext that you can copy and paste through any messaging app (iMessage, WhatsApp, Telegram, WeChat, etc.), and decrypts ciphertext back into plaintext on the other end. How it works: 1. Add a contact and complete a guided handshake to establish an encrypted session 2. Verify identity fingerprints through a trusted channel 3. Type your message -> tap "Encrypt & Copy" -> paste the ciphertext into any messenger 4. Receive ciphertext -> tap "Paste & Decrypt" -> read the plaintext Security: - End-to-end encryption powered by Signal Protocol (X3DH + Double Ratchet) - AES-256-CBC with HMAC-SHA256 for every message - Per-message forward secrecy: compromising one key cannot decrypt past or future messages - Out-of-order message decryption support - Identity fingerprint verification through a trusted channel - All keys are generated and stored locally on your device Features: - Works with any messaging platform, no need to switch apps - Guided handshake wizard with step-by-step instructions - Contact management with session status at a glance - One free contact; one-time Pro purchase for unlimited contacts - Supports English, Simplified Chinese, and Traditional Chinese - Available on iOS and macOS with cross-platform session compatibility - Dark mode support Your messages stay private, no matter which messenger you use. Privacy Policy: https://covalith.com/legal/apps/secret-text/privacy/ Terms of Use (Apple Standard EULA): https://www.apple.com/legal/macapps/stdeula/