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RSA Encryption Next: RSA Exercise Up: crypto Previous: Certification OK, in the previous section we described what is meant by a trap-door cipher, but how do you make one? One commonly used cipher of this form is called ``RSA Encryption'', where ``RSA'' are the initials of the three creators: ``Rivest, Shamir, and Adleman''. It is very simply to multiply numbers together, especially with computers. Suppose I give you the number 1459160519. Now it doesn't take a computer long to try out 38000 possibilities, but what if the number to be factored is not ten digits, but rather 400 digits? seconds - an 18 digit number. possibilities. possibilities. times the life of the universe to factor the large number. It is, however, not too hard to check to see if a number is prime--in other words to check to see that it cannot be factored. So RSA encryption works like this. and that have 100 or maybe 200 digits each. . is basically my public key. ; I just need to multiply my two numbers. . But exactly how is

30 Amazing , Specialized and super smart Search Engines other than Google Google, since its creation has been the most used and most preferred search engine. For searching anything and everything , people around the globe have relied on it. But as its area of coverage is so vast, that sometimes we don't get what we want. So what, if you need to drill down your searches by more specific details, do you trust Google to give you what you need every single time? Here's a collection of 30 vertical search engines which you must keep in your mind while you need some specialist power. Flights / Travel 1. 2. 3. Blogs 4. Images 7. People 9. Forums 11. Music 12. Audio and Video 16. Resources 18. Domain names 20. 21. Icons 22. Private search 25. Similar websites 26. All-rounders 27. So when at times you find Google a bit annoying with its huge and diverse search results, you might want to use some of it, for your specialized searches.

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