Embodiments herein describe a system that includes a scanner that captures images of a package. The scanner processes the image to identify a destination for the package. For example, the scanner may transmit bar code data identified in the image to an inventory tracking system which issues commands to an item-sortation machine for routing the package to its destination. The images of the package captured by the scanner may include private information that is not needed or used to determine the destination of the package. To protect private information in the package, the scanner assigns an obfuscated ID to the package which the scanner, inventory tracking system, and item-sortation machine can use to pass messages corresponding to the package. After processing the image to identify the destination (e.g., data encoded in a bar code), the scanner can erase the image.