Memory Stick also offers a reliable copyright protection environment which will allow users to securely record copyright content, yet at the same time ensuring the intellectual rights of copyright owner are protected. The Sony Memory Stick Duo is slightly smaller than the competing Secure Digital (SD) format and roughly two thirds the length size of the usual memorystick form factor. The sony memory stick PRO Duo "MagicGate" standard for Memory Sticks is an encryption system which will allow all your music to be downloaded to the card and played back by an authorized device like DRM, but not shared. Certain standard Memory Stick and all PRO and PRO duo sticks are MagicGate compatible.