The question came to my mind when I want reading a report on Corporate email security from Coremail, according to the report, the 112M corporate email users in China receives 730M Junk mails every year, representing 69.8% of all emails they receive in their corporate mailbox; if the attackers try 10 times, they can successfully hack into 109.8K email accounts It does sound..well...not so secure. Not at all. But i have felt so when using my company email. This realization gets me curiosity to find out what makes the sense of security and what breaks it. Dictionary.com defines the term security in several ways, but we'll focus on these two descriptions: Freedom from danger, risk, etc.; safety. Freedom from care, anxiety, or doubt; well-founded confidence. The first form of security is what an information security program is meant to address. Information systems can be defined as being "unsecured," so we attempt to "secure" t...