Unit 3 Under the sea grammar课时作业

第一节 阅读理解

　　Computer security is a contradiction in terms. The arrival of the "Internet of Things" will see computers baked into everything from road signs and MRI scanners to artificial body parts and insulin(胰岛素) pumps. There is little evidence that such equipment will be any more trustworthy than desktop computers. Hackers have already proved that they can take remote control of connected cars and pacemakers.

　　However, it is tempting to believe that the security problem can be solved with yet more technical wizardry(魔法) and a call for further watchfulness. And it is certainly true that many firms still fail to take security seriously enough. That requires a kind of lasting insistence which does not come naturally to non-tech firms. Actually, there is no way to make computers completely safe. Software is hugely complex. Across its products, Google must manage around 2 billion lines of source code-errors are unavoidable. The average program has 14 separate bugs, each of them a potential point of illegal entry. Such weaknesses are worsened by the history of the internet, in which security was an afterthought.

　　This is not necessarily in despair. The risk from cheats, car accidents and the weather can never be avoided completely either. But societies have developed ways of managing such risk-from government regulation to the use of legal liability(责任) and insurance to create more safer behaviour.

　　Start with regulation. Governments' first priority is to control from making the situation worse. Terrorist attacks often bring calls for codes to be weakened so that the security services can better monitor what individuals are up to. But it is impossible to weaken codes for terrorists alone. The same protection that guards messaging programs like WhatsApp also guards bank business and online identities. Computer security is best served by encoding that is strong for everyone.

The next priority is setting basic product regulations. A lack of professional knowledge will always block the ability of computer users to protect themselves. So governments should promote "public health" for computing. They could insist that internet-connected contents be updated with fixes when faults are found. They could force users to change default(默认) usernames and