Category: Sci/Tech

One Size Fits All (by )

On Monday, I happened to be discussing some ARGON stuff with a friend, and he pointed out that what I'm trying to do, in many ways, is to find a one-size-fits-all solution for a lot of problems, and that this is often dangerous since you can end up making a nasty compromise.

He's right - part of the challenge in designing ARGON has been to find ways to avoid nasty compromises. So I thought I'd describe a few techniques I've been using.

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T H Huxley (by )

Dear fellow geologist,

I have found a thing of exquisite beauty in the Oxfam book shop in Stroud yesturday. I couldnt believe my eyes when I saw it - I spent a whole 12 quid on it so I expect you all to ogle it and go ooooooo lots!

TH huxley

Isn't it just the best? Notice the date if you will on this next photo!

1895!

1895!!!!!!! Wow - not only is it one of our oldest books but just wow! I found it becuase I was looking for a presant for Al who collects old technical and scienific books.

For us RSM peeps T H Huxley is very very improtant 🙂

I am horrified at the wikipedia artical on the guy - yo geologists that are better than me - go and put our history into the artical please!

I would give a link telling people about T H Huxley and stuff to do with the Huxley school, the RSM and Imperial college but I cant find a decent write up or the pages dont work - why am I not suprised? If a peeps knows of anything good I could link to let me know?

Thanks

Oh and isnt the book lovely - for those who cant read the title on the book its Science and Education Essays by T. H. Huxley its volum III though so now I suppose I have to hunt the others down to make a nice set!

Sarah is very happy - geology love and old book love combined in one precoius bundle - sarah skips away into the sunset to read - woundering vaguely if it should be done with rubber gloves on? Hmmm.... maybe I should get Al to do more reading of old books.

.Mac silliness (by )

Syncing with .Mac will add 215 contacts to your address book, delete 217, and modify none

.Mac is a suite of online tools Apple sells to go with their Mac computers. I use the thing purely because it lets my desktop and my laptop both synch various useful bits of data - bookmarks, mail accounts, stored passwords, address book entries, and my calendar.

However, sometimes the synch messes up, as the picture above suggests. When I confirmed the above change, my address book was reduced to a few contacts, plus pages of ones called "No Name" that had no details in them.

Luckily, I had a backup...

Cryptanalysis 2 (by )

In a previous post, I discussed the analysis of an initially robust-looking combination of S-boxes, then suggested two potential extensions of the algorithm to examine.

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Cryptanalysis (by )

Cryptanalysis is the science/art of analysing an encryption system's design to try and figure out how you'd break it.

If encryption systems were used properly, this would be very hard. After all, in that case, all you'd ever have access to was the design of the encryption system and a stream of intercepted encrypted messages.

However, in practice, it's possible to guess parts of the messages (perhaps most start with "Dear ..."), or even to occasionally steal a decrypted message and pair it up with its encrypted version, then study the relationships between them (known plaintext attacks). Or sneak a spy into the organisation being studied, and just ask them to send emails to the person at the other end of the encrypted link, in the middle of the night, at agreed times, so it's easy to spot the encrypted version of the message. Then you have a chosen plaintext attack, which is the most powerful kind.

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