computer science

Cryptography

Cryptography is study of sending message secretly.In modern times,it comes a branch of information technology,as the mathematical studies of information and specially ,its transmission from place to place.

       One of its objective is to hiding the meaning of the message .It also contributes to computer science,central to technique used in computer and networks security for such things as access control and information confidentiality.

         Cryptography is also used in many application we encountered in everyday life,the security PIN code in ATM cards and centres,in personal computer as a passwords,and electronic commerce-all are depend to cryptography.

               Before modern age,Cryptography was concerned only to message confidentially. 

facts

Do you know?????????????

A group of crows is called a MURDER.

In its lifetime,a Shark can grow,lose,and replace THOUSAND of teeth.]

Flamingoes have knees that can bend BACKWARDS.

An octopus have THREE hearts.

If a cow listen to music,there will be MORE in the bucket.

Every shrimp is actually born a male and then becomes FEMALE as it matures.

A starfish doesn't have a BRAIN.

Australia has a population of 17 million people and 150 million SHEEP.

Gorillas sleep up to FOURTEEN hrs a day.

Mice that feed on peanuts can run  TWICE  as far. 

WORLD RICHEST PERSON

Do you who is the world richest person in 2012?

No.1: Carlos Slim Helu & family
$69bn
Age: 72
Industry/ Company: Telecom
Country: Mexico
Source: Forbes ‘The World’s Billionaire’s List, March 2012

         WORLD COSTLIEST VIRUS

Do you know world costliest virus is MyDoom

Descriptions:The most devastating computer virus to date is MyDoom, which caused over $38 billion in damages. In addition to being the most expensive virus to date, its effects were far-reaching and fast-moving. When a user was infected with the virus it creates network openings which allowed others to have access to your computer. In addition, the virus also had the ability to open random programs. In 2004, an estimated 25% of all emails had been infected by the virus.

                                            facts

*King Louis XIV of France bathed only thrice in his lifetime.

*Do you know 80% of the people over the age of 100 are women.

*Do you know if your circulation system is laid out end to end,it would circle the globe 2.5 times.

*Do you know An average human produces about 37,900 litres of saliva in their entire lifetime.

                                                   


                                                                Do you know that...???

                                                                                A Mole

Moles are able to tunnel through 300 feet of earth in a day.These are hard workers and very dedicated toward this types of task

ROUTER

Router is a networking device which is used to send data packet to final destination

It is considered traffic cops of the Internet

It sends data in most efficient way.Its reads the destination address of data packet,calculate the best route and send packets toward its final destinaion.If the destination is on the same network as the sender computer ,the router sends the packet directly to the destination computer,if it not in the same network,the router instead sends the packet to another router closer to that network.

                                                                                    IP packets carries a segment that holds the maximum hops count it can travel,router reads that and send the packets without exceeding that predefined number of hops