WannaCry

Ransomware attacks have been taking place for a long time, but their frequency has increased in the last few years

The biggest nightmare for an individual in this digital age is to see an unauthorised debit in his bank account and realise he has been a victim of an online fraud

Self-taught computer-security researcher, avid surfer was hired by Kryptos Logic

The attacks paralysed Britain's NHS and wreaked havoc with computer networks worldwide last month

Vulnerability could be used to create a worm like the one which allowed WannaCry to spread quickly

Recent cyber attack, WannaCry, has exposed India's vulnerability on online

Analysts ask govt to open up about cyber attacks to deal with such challenges

WannaCrypt locked up machines, encrypted files and demanded approximately $600

WannaCry - "ransomware" has locked up more than 200,000 computers in more than 150 countries

WannaCry encrypts data files and ask users to pay a $300 ransom in bitcoins