It offers a great oversight of encryption methods, historical relevance and most importantly, emerging patterns that offer an attack vector due to lack of entropy which leads to a low key-strength. This video is a great way to get into the principles of cryptography.
The series can also be watch directly on youtube via this playlist:
WASHINGTON — NASA and Internet Archive, a non-profit digital library based in San Francisco, made available the most comprehensive compilation ever of NASA’s vast collection of photographs, historic film and video Thursday. Located at www.nasaimages.org, the Internet site combines for the first time 21 major NASA imagery collections into a single, searchable online resource. A link to the Web site will appear on the