@Sanoop Mallissery: U r right! By adopting security measures we can keep our data safe to a great extent but, is it always possible  or I can say, whether we always are strictly following  all security measures while communicating? Certainly not! More we share information, the more we  violate the norms and the more we are prone to vulnerabilities. And this is the ultimate level of security in this information era, at least at this point of time. 

Security issues? well, still fall into open research area.

No! System security is still a big challenge and is getting simply bigger day by day with  challeges posed by adversaries, hackers, intruders and most importantly due to the riskful and careless attitude of we all the users towards the security guidelines. But, it no way nullifies the developments those have occurred in this line over the years. we have travelled a long distance from the 'no secure' era to a relatively secure info era and we have to cover still miles ahead.

Connect to a Secure Network

Enable and Configure a Firewall

Install, Update and Use Antivirus and Antispyware Software

Remove Unnecessary Software

Modify Unnecessary Default Features

Operate Under the Principle of Least Privilege

Secure Your Web Browser

Use Good Security Practices

Use caution with email attachments and untrusted links

Use caution when providing sensitive information

Create strong passwords

But, are we really following all the conditions mentioned above? If we do that, i guess the security solutions provided by various vendors are enough for us to secure our network or computer to an extent. Complexity do not matter to an extent if all systems in a networks follows the above conditions.

As we say sometimes that "students are nowadays better than teachers"; similarly hackers or attackers are always one step ahead of the people who provides security. Most of the cases, the people who provide security only make threats to marketize their anti product. But this all depends on the perception, usage or how much security required for our application or environment or how much we have scaled our networks.

Just my thoughts shared. thanks for a good question.

Regards

Sanoop

One of the fundamental challenges with discussions around security and ubiquity is they pull in opposite directs.  The more we share data and access to data the more ubiquitous our informational pathways become.  Data-sharing promotes ubiquity.  However the more we share data - the greater the number vulnerabilities, entry points, and number of discrete users there are. This increase in vulnerabilities ( irrespective of whether they are hardware, software, or wetware - eg Humans) call for higher level's of security provisioning.

So a general summation might conclude that as we increase ubiquity we automatically open ourselves to additional security challenges.  Collectively and globally we are well off reaching the point of ICT saturation ( an endpoint to the question of ubiquity).  Only once saturation takes place - could we consider whether our security systems are up to date.

Best regards

David

Thank you David, agree indeed the more connectivity adds to complexity which ultimately translate to more challenges for securing it.

@Sanoop Mallissery: U r right! By adopting security measures we can keep our data safe to a great extent but, is it always possible  or I can say, whether we always are strictly following  all security measures while communicating? Certainly not! More we share information, the more we  violate the norms and the more we are prone to vulnerabilities. And this is the ultimate level of security in this information era, at least at this point of time. 

Security issues? well, still fall into open research area.

Thank you Minati, Indeed we are yet just at the very beginning of new era of cyberspace  and its related cyber security issues

Thank you all for your answers. Indeed, the computer-cyber security is quite complex domain and solutions as well as challenges are many.