InfoSecurity is an interesting show because it is such a combination of products. One has everything from high-end hardware box makers (e.g. the
Bivio 10G deep packet inspection device) to anti-virus or anti-spyware products for home users.
One trend that did seem obvious is that people are moving away from the idea of protecting the network as a whole towards protecting sensitive servers or other devices on the network. While this is not totally true - there were vendors such as Airtight Networks who try to eliminate WiFi networks from sensitive areas - the most common buzzword seemed to be NAC (Network Access Control), with numerous vendors offering different plays on this topic. Of course what is said at the show about NAC and what is actually deployed may be two different things, NAC solutions that have vulnerabilities can lead to really nasty security holes as Network World reports.
Another area of interest to me at least with my data comm background was the various approaches to encryption of data at wire level. Companies such as Infoguard and Insta were offering various low level encryption techniques and there were of course companies offering a variety of VPN and SSL encryption services to allow nomadic workers and partners access to sensitive information. Given the current UK scandal about medical records, one suspects that, like NACs, these secure access methods are going to be misapplied widely.
Indeed there were a couple of companies offering security audits and "ethical hacking" services - something which sounds like an excellent idea given that ever more sensitive personal data is being stored on computers that are accessible to anyone with an internet connection.