HarperColllins and ebook distributor LibreDigital, have signed up to use a new technology called Guardian Watermarking for Publishing from Digimarc, a new anti-piracy technology that embeds an invisible watermark into ebooks at the time of transaction. The service is cloud-based and offers an easy-to-integrate API for most ebook formats, including EPUB, PDF and MOBI.

READ MORE: HarperCollins Is Now Using Digital Watermarks To Stop Ebook Piracy | Gizmodo