Profile

I am just finishing my PhD in cryptography.  I’ve spent 3 and a bit years trying to figure out ways to send messages in secret, without anyone else being able to read them. In a few months I’ve got my exam and if I pass I will get to be Dr Freya!

In the mean time, I just started a job in ‘cybersecurity’, or ethical hacking as it is sometimes called. So I spend a lot of time trying to find ways to hack into computers, then working out how to fix it, before the bad guys get a chance to do it.

In my spare time I am a scout leader and love doing anything outdoors and I sing in my local Rock Choir.

Phone calls, wi-fi, 3G, 4G, GPS, even bluetooth and the new ‘near field communication (NFC)’ (for those of you with fancy new  phones) all have one thing in common. They use microwaves. Not like the machine in your kitchen though! Microwaves are made of the same stuff as light but with much less energy, so you can’t see them. You also don’t need special equipment to measure them with accuracy- they are quite big. This means that you can see something called ‘the uncertainty principle’ quite easily.

Ever heard of the uncertainty principle? It means that you can’t know absolutely everything about something.  There is always a bit you don’t know. No matter how hard you try. Even if you are a super human hacker scientist.

How does this help? Well, If I send you something that is top secret, by microwaves, and an evil eavesdropper (let’s call her Eve) tries to examine it, there will always be bits of it she can’t know about. Sad Eve is sad. I hid the secret bit where she can’t find it! Sure, she knows a bit of what I’m trying to say, but she can’t know all of it. So I’m going to capitalise on that. Ta-da, we have a secret!

I spent a lot of time trying to see if we could make this work in satellites. It turns out we probably can!

I also now spend some time doing ethical hacking. That means looking for ways to break into computers and then how we can fix that before we let the bad guys have a chance.

I don’t like to sit at a desk. Desks are boring. I wear comfy jeans to work so I can crawl around in the lab and get my hands dirty playing with our machines and different bits of kit (the cryostat is my favourite- it cools things down to 0.01K. That’s pretty much the coldest you can get). I don’t just work on my own project too- there’s always other stuff to be doing- some of the projects going on in the lab include looking at lasers and how they work and seeing if quantum computers and teleportation are possible.

I spend some of my time playing with a satellite system and getting secret messages to work in that.

I usually have to spend a bit of time at my computer though. Coding a secret messages app, and coding the insides of the phone that I am building.

Sometimes I am off teaching students in the teaching labs. Other times I go out to schools to talk about physics careers. And sometimes I go to conferences to talk about my work with other scientists. I also have to go and meet up with other people that I am working with across the country which is always fun.