Web Cryptography: Salted Hash and Other Tasty Dishes

One of the most powerful security tools available to web developers is cryptography—essentially a process by which meaningful information is turned into random noise, unreadable except where specifically intended. A web developer working on an underpowered netbook in his basement now has access to cryptosystems that major governments could only have dreamed of a few decades ago. And ignorance of cryptography is not bliss. You may think your web app’s profile is too low to worry about hackers, but attacks are frequently automated, not targeted, and a compromise of the weakest system can often give access to better-protected systems when people re-use passwords across multiple sites. Learn the three broad categories of cryptosystems that commonly relate to web applications and begin strategizing how to make your site secure. Bookmark It Hide Sites

Designing Web Registration Processes for Kids

Designing websites for kids is a fascinating, challenging, rewarding, and exasperating experience: You’re trying to create a digital experience for people who lack the cognitive capacity to understand abstraction; to establish brand loyalty with people who are influenced almost exclusively by their peers; and to communicate subjective value propositions to people who can only see things in black-and-white. Fortunately, it’s possible to create a successful registration process for these folks with an understanding of how their brains work. Debra Levin Gelman explores how to design effective registration forms for kids based on their context, technical skills, and cognitive capabilities. Bookmark It Hide Sites

Cross Platform Scalable Vector Graphics with svgweb

Pity Scalable Vector Graphics. It’s been an official standard since before IE6 was released yet has never found much of an audience on the web, certainly not the one it deserves. Just as SVG was starting to establish some browser support, along came the canvas tag, stealing the thunder of dynamically generated client-side images. Yet despite all the attention being paid to canvas, there’s still a place for SVG, particularly for developers looking to replace plug-ins like Flash for data visualization. Unlike canvas or other script-only approaches, SVG can be easily divided into design and code elements, with just a little code to add interactivity. It even works on devices like the iPad and iPhone. And now, thanks to svgweb and a clever use of Flash, it works on older platforms no one could have ever imagined supporting SVG. Jim Ray shows how. Bookmark It Hide Sites