Happily, the same technique that cracks the old system produces a newer, even more powerful one – much to the relief of the financial institutions that rely on secure transactions. They don’t have to go through any intermediate steps, because one of the superposed states already holds the correct answer.Which is where the banks and governments begin to take fright, and seek newer forms of cryptography to defend against this. The whole show is tongue in cheek, so what’s the problem?”Strange how a media witchhunt changed his mind.pandora independent.co.uk. The two were on no-speakers for some time, but have now given a joint interview to Time Out , announcing that peace has broken out.”I didn’t finish reading [Wood's review] because I was very upset,” says Smith, above “I took it to heart. But with good reviews I always have contempt for the person who wrote it I always think: Yeah, yeah, yeah I don’t believe you. Unless it’s a writer who I admire hugely, I think: why would it make any difference that you think it’s good?”How lofty!* LABOUR MPS are (perhaps prematurely) speculating about Tony Blair’s post-election Cabinet reshuffle.One theory doing the rounds is that Patricia Hewitt will be promoted to Secretary of State for Defence “She’d be the first woman in the job,” says one MP. But is it alive or dead before you open the box? Arguably, it is both; by opening the box, you “collapse” its alive-and-dead state into one or the other.A quantum computer takes this idea to the extreme.

Clearly, when you open the box, the cat is either alive or dead. Physicists say that any closed quantum system has a “superposition” of all possible states. Remember “Schr?ger’s Cat”? This is a theoretical experiment about a cat trapped in a soundproof box with a cyanide canister that would be let off if a radioactive particle decayed, of which there is a 50-50 chance. That’s because quantum computing uses some of the weird aspects of subatomic particles such as electrons and photons to do its calculations. Both electrons and photos can have a quality called “spin”, which is either “up” or “down”; in the quantum computing field these are often used as the “0″ and “1″ of conventional binary calculation.What marks out quantum computers is that they don’t have to proceed through their calculations step by step. In the past two years, Intel, IBM and Motorola, the biggest chip-makers, have had problems with the reliability of chips with 65-nanometre parts.Second, quantum computing and calculation offer a whole new approach to solving problems.

But eventually physical reality will intervene; at some point between 2010 and 2020, the transistors will no longer be shrinkable, because the electrons that carry the signals will leak out Some of that effect is already visible. “Moore’s Law”, which was coined in the 1970s at Intel, predicts that every 18 months the number of transistors (the building blocks of processors and memory) doubles in any given area of integrated circuits, making the machine more powerful. “The whole field of quantum technology is growing, taking in communications, computing and cryptography.”The reason for this burgeoning interest is twofold First, computers as we know them can’t keep getting faster. “The computing side is just one aspect of the field,” he says. Professor Apostol Vourdas, of Bradford University’s computing department, has just won a £62,000 grant to co-ordinate a network of universities and companies including HP and Hitachi in a quantum computing project He is working with five PhD students. Although the physicist Richard Feynman put forward the ideas that are the basis of the subject in 1982, the wider interest took off only after a researcher called Peter Shor demonstrated – theoretically – in 1994 that a computer with enough “quantum bits” could effortlessly crack modern encryption.Interest in the field has now taken hold across the world.

Systems used to transfer funds around the world every day rely on encryption that takes milliseconds to encode, but, in theory, millions of years to crack, by even the most powerful computers. And governments routinely use encryption to pass on secret messages.Quantum computing threatens that, which is why bankers and governments are paying particular interest to a field that barely existed a decade ago. When bankers and spies begin to worry about advances in computing, the rest of us would do well to take notice. What makes them edgy are the advances being made in “quantum computing”, which is, as might be expected from the name, as entangled and confusing a field to understand as the branch of physics on which it is based – quantum mechanics.
But a banker doesn’t need to be able to understand quantum physics to know that a computer capable of breaking any of the world’s encryption codes as soon as it is turned on could mean serious problems for the bank’s financial system. Rightly or wrongly, such policies appear to pander to the unreconstructed wing of the Tory party and beyond.Sandra Howard’s devotion to her husband is touching, but I doubt that even she believes that he is destined for the office of Prime Minister And in her heart of hearts, she’s probably rather relieved.. That is her charm, of course, and it does succeed in making one think better of him.

Once Howard starts talking about tough restrictions on immigration, though, as he has just done, any softening of his image is forgotten. It’s how you get there.” She concedes that the Conservatives have not communicated successfully with the electorate. “I think where we did go wrong was that we didn’t feel the need to present things in a way that was more acceptable. We didn’t have a good bedside manner, but we’re getting better.”Loyalty could be Sandra Howard’s middle name (a recent report claimed that she was drafted in to talk her husband out of quitting during a “wobble” late last year), but only someone as blind to her husband’s faults as I suspect she is could fail to find irony in the idea that Michael Howard has a good bedside manner. “Everyone wants to reach the same end, to make lives better, more comfortable, happier. “I absolutely disagree, I really do,” she says, passionately now, and thus roused to speak just a tiny bit louder. “I think you find more people putting themselves out for charity work than in any other party.” I wasn’t saying they are harsh, I say, just that that is the public perception of them “I disagree with that, too,” she says.