or shrunk to fit. This could result in, respectively, images that are missing content, distorted, or which have blank space around them. This can be avoided by buying a frame with an aspect ratio that exactly matches the camera, or editing photos to the target aspect ratio before transferring them to the frame. Security issues In February 2008, a number of digital photo frames, such as the Insignia brand digital frames manufactured in China, were found to be carrying a Trojan horse dubbed Mocmex on their internal data storage. Instagram allow third party app users to connect to their Instagram photo content using OAuth to display photo content and authenticate without the app storing login credentials. Digital photo frame apps are using this secure login protocol to eliminate security issues linked to storing login credentials. History The first generation of digital photo frames were introduced in the 1990s and included screens with the ability to accept memory cards directly from digital cameras. Widespread adoption of digital cameras in the 1990s left consumers with thousands of digital photos without a viable way to view them. Commercially available digital photo frames started to appear shortly after the introduction of digital photos but did not find market adoption until the mid 2000s when the number of digital photos exploded with the integration of digital cameras into cell phones. First generation frames enjoyed widespread market adoption. The market peaked in 2009 at over $1B worldwide, but the introduction of Apple's iPad started the market's slow decline. First generation frames are still sold today at prices under $100. The second generation of digital photo frames included connectivity to the Internet. In 1999 with the Ceiva introduced a digital photo frame with dialup connectivity. By 2010 Nixplay and PixStar started to popularize digital frames with wifi connections, allowing consumers to upload photos from the web and connect to cloud based photo sharing and storage sites from Flickr, Picasa, Google Photos, Instagram and Facebook. By 2016, the third generation of digital photo frames began to appear with companies like PhotoSpring, Aura and Joy. These frames employed tablet platforms to build photo frame features on top of. This allowed the use of touchscreen and battery technology for frames from PhotoSpring and Joy, and camera technology from Aura and Joy. See also Internet radio device Media phone Photo sharing References Digital photography Digital imaging Picture framing