This article also appears in Canadian Developer Connection.

I caught the afternoon sessions of MeshU, the day of workshops that precedes the Mesh Conference. MeshU had three tracks – Design, Development and Management – and I chose to attend the sessions in the Development track.

Leigh Honeywell on Writing Secure Software

First up was HackLabTO cofounder Leigh Honeywell, (pictured on the right) whose presentation was titled Break It to Make It: Writing (More) Secure Software. She works at the MessageLabs subsidiary of Symantec, which makes security products for email systems, and before that, she worked as an independent security consultant. Simply put, security is both her job and her hobby.

Leigh provided an informative and entertaining summary of the most common security vulnerabilities in applications and the recommended best practices for writing secure apps. Here’s a photo of her slide showing OWASP’s ten principles that you should follow in order to write secure applications:

The ten principles are:

1. Minimize attack surface area
2. Establish secure defaults
3. Least privilege
4. Defense in depth
5. Fail securely
6. Don’t trust services
7. Separation of duties
8. Avoid security through obscurity
9. Keep security simple
10. Fix security issues correctly

She also covered what OWASP considers to be the current top ten vulnerabilities:

1. Cross-site scripting
2. Injection flaws
3. Malicious file execution
4. Insecure direct object references
5. Cross-site request forgeries
6. Information leakage / improper error handling
7. Broken authentication and improper error handling
8. Insecure cryptographic storage
9. Insecure communciations
10. Failure to restrict URL access

At the end of her presentation, Leigh listed a couple of books that she considered to be valuable security references. One of them was Writing Secure Code, Second Edition, written by Michael Howard and Steve Lipner and published by Microsoft Press.

This was a surprise to many people in the audience, the majority of whom were not building apps on Microsoft technologies and generally (and often mistakenly) think of the term “Microsoft” being synonymous with “insecure”. A number of people chatted with me after the presentation and it seemed like this was one of many things from Microsoft that caught them by surprise, along with other unexpected things including the MS-PL license, CodePlex and the Open Source Lab, the new emphasis on standards and interoperability…and hey, even taking on “unlikely” evangelists such as David Crow and me.

Here’s her slide deck:

Pete Forde Does the iPhone Dance

Next was Pete Forde, one of people behind the development shop Unspace and the RubyFringe and FutureRuby conferences. He started his presentation, Is That an iPhone in Your Pocket, or are You Just Happy to See Me?, with a Napoleon Dynamite-esque dance number set to the tune of Start the Riot by Atari Teenage Riot. Here’s the video of the dance that Leigh Honeywell shot:

And here’s the video that I shot:

Pete’s presentation covered the options that developers have when building iPhone apps. For the curious, here’s the deck he used:

The one thing that he wanted you to take away from his presentation is, in his own words:

Consider iPhone web applications and side-stepping the iTunes Application Store (and their 30% gross cut) completely.

The one thing that I took away from the presentation (in addition to the one above) was that it’s not all smiles and sunshine in iPhone development land. Yes, the iPhone provides an excellent user experience and the App Store has been a hit with the customers and many developers. However, a good chunk of Pete’s presentation was about how some of the biggest obstacles for iPhone developers come from Apple itself; I’ve heard that there were similar grumblings at an iPhone developer meetup that took place later in the week. I think that there are some things that Windows Mobile developers (and the Windows Mobile team at Microsoft) can learn from these obstacles, and I’m going to write about them in a later article.

Chris Wanstrath and the Story of GitHub

The final presentation of the afternoon, Building a Business with Open Source, was given by Chris Wanstrath of GitHub, a hosting service for software repositories created with the Git distributed version control system. There are a number of open source projects hosted on GitHub, including one you might not expect: Microsoft’s very own IronRuby.

Chris explained that GitHub was an answer to a problem that he and his friends had: they were working on a number of open source projects, so many that managing them was “beginning to wear them down”. GitHub was created as a solution to that problem: it took care of the tedious parts of source code management so that they could focus on their code.

Although GitHub hosts a number of open source projects and uses Git, which is open source, it is not open source. Chris explained that managing an open source project takes up more time that he or the others on the team have. “Ironically,” he said, “starting GitHub has given me less time to work on open source.” After hinting at his dissatisfaction with the GNU General Public License, an audience member asked "Does the GPL cause you nightmares?"

“Yes,” he replied, after which he endorsed his preferred open source license. “MIT license all the way,” he said.

To promote GitHub, they took an approach that was closer in spirit to evangelism than standard marketing. “Companies still believe in old-school advertising, and they also think that what works offline works online,” he said. So they rely on the standard offline methods of promoting their wares: advertisements and marketing campaigns. In the online world, people trust their peers, so they opted for an approach that he called “guerilla marketing”: instead of spending money on ads, they spent money to hang out with developers, buy them beer and pizza and provide “a human face” to GitHub. He summed up the approach with a good one-liner: “Who knew that actually spending time with your customers would be good for business?" A great point, especially in today’s word-of-mouth-y, interconnected world.