Terrorists may talk to each other using mobile phones, just like any other people in this world. They may even use them, theoretically, to set off bombs from a distance. This has led governments to consider switching off mobile phone networks after terrorist attacks. In the same vein, allowing the use of mobile phones on airplanes in flight worries them a lot. This is nonsensical for a number of reasons.
Continue reading “Don’t switch off mobile phone networks, extend them”
US companies are subject to this act in any case, but for us non-US residents and non-US companies, it seems an utterly bad idea to host our data on American based ISPs, since all of a sudden our data can be collected by the US government without a warrant or even without us knowing about it. The ISP can’t even tell us, can they?
Does this mean that applying prudent IT security principles would prohibit any non-US based company from using any US-based hosting provider? Or maybe even any hosting provider with a US-based company anywhere in the ownership chain?
It seems that way to me.
Continue reading “Is it due diligence to avoid US hosting providers?”
I just read an article in IEEE Computer, June 2005, called “Security Technologies Go Phishing”. It’s about new ways of stopping phishing attacks. Among other things, they present a system that lets a bank (for instance) have their users choose a picture from an album. That picture is then included in email that the bank sends out, so the user knows that the email is for real and not spoofed. To me, there are many things wrong with this idea and any similar developments. (Please note: the article mentions other interesting systems and the given company has other interesting products. I’m only picking on this one idea, here.)
Continue reading “Have they forgotten about PKC’s and SSL?”
Increasingly, computers are used to write pharmaceutical prescriptions and other medical documents. In most cases, the “signing” of these documents is a sad affair involving some simple checking of checkboxes and clicking of buttons. The application usually takes it from there, attesting to anyone willing to believe it that the logged on user (whoever that may be in reality) clicked the click and thereby took responsibility for the whole thing.
In more sophisticated systems, an actual digital signature is applied to the prescription. If we’re lucky, it’s also done in the right way (except I’ve never heard of a system doing it right), with digital signatures. If we’re even more lucky, that digital signature is not kept on the computer, a floppy, a USB flash memory or a dumb card (a magnetic stripe card or memory card), but on a smart card with microprocessor. But even then, we’re far from safe.
Continue reading “Smart cards should have keypads and beepers”
When we apply a digital signature to a data structure, we only apply it to the data actually present in the structure. But most of that data is only meaningful in relation to external data tables, and used with certain applications, which can change without influencing the signature on the data structure. This is a serious problem in many application areas, but in none as much as in medical informatics.
Continue reading “The Semantics of Signing”
A discussion of how future medical information communication systems could be built for maximum security and openness. Multiple actors do want and need access to the architecture so they can freely select components to fit into the architecture. These components can be conversion engines and scripts, maintenance systems, encryption and signature systems, and communication links.
Those medical institutions, labs and care providers that have moved over to computerized medical records usually are able to send requests, reports and other communications to each other using computer networks. Often, this is done by third party systems that centralize the conversion of the data. These third parties usually also provide the communication infrastructure and the necessary client applications, but it’s a cultural thing, so it varies a bit from country to country. For a number of reasons, I do think the time has passed for these third parties, even though they’ll probably be in business for a while longer. Nothing in medical computing changes very quickly.
Continue reading “Medical data communication systems, next generation”
Two-factor authentication using hardware tokens to log on to internet banking sites (among other things) is intended to make banking over the Internet more secure. It turns out that it isn’t as great as it seems to be on first blush. Bruce Schneier has talked about this problem several times. Why is this problem so difficult?
Continue reading “Authenticating transactions, not people”
If you’re a member of some organization, or have some certification that entitles you to sign up for services somewhere, you need to be able to prove that you have that credential somehow. In real life, you’d carry a plastic card issued by a reliable organization and that you could flash in the face of whomever needs to see it. But how do you do this in the Etherworld?
Continue reading “Proving membership online”
After using Windows in one version or another for many years, I got myself an Apple iBook just three months ago. I use that iBook for everything I can use it, that is, everything except developing applications, since my customers still are stuck with Windows. What has struck me with the iBook is that working as a non-admin on these machines is absolutely no problem, while it’s an incredible pain in the derriere if you try to do that under Windows.
Continue reading “Microsoft’s logon model problem”
So, here I am, enriching the world with another blog you can’t live without. I know you’ve all been waiting with bated breaths on my words of wisdom, that the internet has been standing still, hushed and quiet, to see what I have to say.
Continue reading “As if the world needs yet one more blog…”