Note to all - I have been working with designers and graphics artists for 20+ years for logos, branding, Powerpoint, etc., but it has always been very face to face. This is my first time using 99 Designs or this way of working so please be patient as I learn the interface and how the process works!
I have included some examples of current cyber security podcasts in the iTunes store as well as some examples of other designs that I think are eye catching. In many of them, the oranges, reds and warmer colors pop more and catch the eye when viewed in this tile format. I also like the way the oranges and blues work together. I think grays, black, and white space can really make it appealing as well. The goal is to make something that attracts the eye, and gets people to click on the podcast link.
For iTunes logos, the size needs to be 2048 x 2048. I will be using the logo on the social media pages as part of this package, as well as the website which will be built in Wordpress. The theme I am considering is "Maron Pro Theme" (http://my.appendipity.com/maron-pro/). I will be using the social media site to promote the podcase and direct people to the website and iTunes.
Overall design thoughts: Incorporate a microphone (vintage/retro) with a lock. Something that really conveys podcast, cyber security, and interviews.