The REDEYE Protocol is a proprietary method developed by Hewlett-Packard (HP) for encoding and transmitting data using infrared (IR) bursts. It is primarily used in secure device-to-device communications, such as between printers and computers, to ensure data integrity and confidentiality during wireless transfers. The protocol structures data into specific packets and employs error-checking mechanisms to minimize transmission errors caused by environmental interference. While not widely adopted outside HP ecosystems, the REDEYE Protocol exemplifies the use of infrared technology for secure, short-range data exchange in environments where radio-frequency (RF) communication may be impractical or insecure. Its relevance has diminished with the rise of Wi-Fi and Bluetooth, but it remains a notable example of early wireless security protocols.