Azure

PixelCryptor is a Django app that lets you embed an executable file inside an image. Upload both files, it concatenates them with a delimiter, and stores the result on Azure Blob Storage. You can later extract the original files back out. How It Works The approach is deliberately simple: append the executable bytes to the image bytes with a known delimiter between them. def obfuscate_images(image_blob_name, executable_blob_name): image_data = image_blob_client.download_blob().readall() executable_data = executable_blob_client.download_blob().readall() delimiter = b"---EXECUTABLE_BOUNDARY---" obfuscated_data = image_data + delimiter + executable_data obfuscated_blob_client.upload_blob(obfuscated_data, overwrite=True) Image formats like JPEG and PNG store their data length in headers. Most viewers stop reading at the image data boundary, so the appended executable bytes are invisible when you open the file as an image. Deobfuscation finds the delimiter and splits the bytes back apart. ...

A university project where I built a garbage bin that knows how full it is and tells you about it. An ultrasonic sensor measures the fill level, an ESP8266 sends the data over WiFi, and you can monitor it from a desktop GUI or an Android app. The Hardware An Arduino Uno with an HC-SR04 ultrasonic sensor measures distance to the garbage surface. A servo motor opens the lid when someone approaches (second ultrasonic sensor detects proximity). The Arduino sends distance readings over serial to an ESP8266, which transmits them over WiFi. ...