Secret Message Exchange vs Stego

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!

Stego lets you hide private text or images inside ordinary photos and extract them later on your iPhone or iPad. Your cover images and hidden payloads are processed on your device—they are not uploaded to Japality Limited. CHOOSE YOUR WORKFLOW • LSB-1 for lossless PNG workflows • DCT and GN-QIM for JPEG and recompressed sharing scenarios • Social Media Mode to prepare images for apps that may resize uploads • Optional error correction for tougher recovery FEATURES • Hide text, notes, or an image inside another image • Extract hidden content from stego images • UTF-8 support, including Chinese and emoji • Warnings when a cover image is too flat for reliable embedding FREE & STEGO PRO Stego is free to use with ads. Stego Pro (monthly or yearly subscription) removes banner, interstitial, and app-open ads. Payment is charged to your Apple ID. Subscriptions renew automatically unless canceled at least 24 hours before the end of the period. Manage subscriptions in Settings → Apple ID → Subscriptions, or in Stego → Settings → Stego Pro. PRIVACY See our Privacy Policy for how ads (Google AdMob) and subscriptions (RevenueCat) handle data. Steganography operations themselves stay on your device. IMPORTANT Stego is for lawful personal use only. You are responsible for complying with applicable laws. Steganography is not encryption—anyone with the original file may detect or lose hidden data if the image is recompressed. Support: https://app.japality.com/stego/i/support/ Privacy: https://app.japality.com/stego/i/privacy_policy/ Terms: https://app.japality.com/stego/i/terms/