Data security is now became major concern for companies, organizations, government authorities and even personal users also. Data security is basically prevention of data from being misused by unauthorised parties for fraud. In other words, it means keeping users personal, financial, confidential information safely, so no one can access it. Moreover, there are many ways by which data loss can occur, accidental deletion, computer virus attack, system failure, natural calamities, etc. Knowing these ways data loss can helps to prevent data from data loss. The network structure itself has some vulnerabilities by which attacker can access user’s data. To secure data user should first know about how data can be lost. There are simple ways that can be undertaken to remain secured at all time in cyber world, which we are going to discuss in this article.

Keywords : Cyber Security, Data Loss, Hacking, Malware.