I am not a IT professional anymore.
But my understanding is that specifically, it’s securing a personal device. This is subtly different than SSH, VPN and the like.
For example, on a corporately controlled blackberry for example, you can access your e-mail. But you know that blackberry is running X OS, and is not hacked, rooted or jail broken in any manner. So that eliminates a whole host of security leaks. You can control exactly what that device can and can’t do.
Now look at a personal device? Well, the problem now is that you don’t control it anymore. The user might put monitoring apps or they might jailbreak or root it in order to gain baser access to the device than you as an IT professional might want. So how do you mitigate that? Well, you knowing about these security risks is the first step. It’s needed contextual knowledge and needed security risk identification. So than you can choose what a program must do in order to be secure-able on a personal device. for example, e-mail.
Well, this e-mail application should have a method of detecting jail broken or rooted phones, and it won’t install onto them.
It should have some method of remotely evaluating and validating its own state so that a nefarious user doesn’t somehow hack the program itself.
Do you want the user to be able to download attachments to the device? (then potentially exporting this confidential information off the device, which you can not monitor). How do you secure this scenario? Does the device have a built in viewer, but not a built in downloader?
Can it be selectively remote wiped? (information in the application only, not the whole phone as i’m sure users would be up in arms about that).
I’m sure there are other use cases you can think up. But in my opinion these are some of the ways BYOD is different than secure access. In short, it has slightly different problems than corporately controlled devices.
What’s a bloody pain in the ass is when you have a contractual requirement to BYOD but ah, it must comply with the client’s obsolete specs, but that’s finally being phased out - sort of.