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Using credit cards online is safe because of RSA public key encryption. The only way to crack it would be to factor a publicly known huge number (greater than 10^300) into two also very huge (privately known) prime numbers that are its only factors. This factoring would take longer than the age of the universe on the most up to date machines, and even with 50 million computers banding together it would take thousands of years to crack a single encryption of one transaction. So, the only problems you could encounter with using credit cards online is that you get charged too much. Or your computer could be infested with spyware that steals your credit card number as you type it in and sends it to a 3rd party.xBasx said:ahlan [hi in arabic ]
I want to ask about online books shopping. coz in Saudi arabia, I can't find all books I want to.
but the thought of giving my credit card number online is kinda frightening
is there anyone who had the experience of online shopping from amazon that can help me.
thanks alot