Helen Hockx-Yu is Enterprise Architect at the Office of Information Technologies, University of Notre Dame, where she provides leadership, vision, and expertise to ensure appropriate use of information technology within the enterprise, and develops architectural principles and standards that guide decision-making and IT service management.                                                                                                                                Previously Helen was Director of Global Web Services at the Internet Archive, Head of Web Archiving at the British Library and Programme Manager at the UK Joint Information Systems Committee. She has led many national and international digital initiatives, and has published and spoken extensively about web archiving, digital preservation and digital asset management, addressing national and international audiences at various academic and professional conferences.                                             Born in China, educated in the Netherlands, Helen developed her professional skills in the United Kingdom. She is Fluent in English, Dutch and Chinese.

You’ll sometimes see MD5, SHA-1, or SHA-256 hashes displayed alongside downloads during your internet travels, but not really known what they are. These seemingly random strings of text allow you to verify files you download aren’t corrupted or tampered with. You can do this with the commands built into Windows, macOS, and Linux.

Part of NDSA "Checking Your Digital Content" series.

The following is a guest post by Jefferson Bailey, Strategic Initiatives Manager at Metropolitan New York Library Council, National Digital Stewardship Alliance Innovation Working Group co-chair and a former Fellow in the Library of Congress’s Office of Strategic Initiatives. Here on The Signal, members of the NDSA Levels of Digital Preservation team have been providing some […]

How they're making the filesystem resilient will sound REALLY FAMILIAR...

Free programs to compute the MD5 message digest checksum / hash value of a file or group of files, and compare it with a known value

Download Checksum for Windows for free.  A simple file checksum utility for Microsoft Windows.

Time proven MD5 checksum checker for Windows. Handy interface, free version available for download.