Q. The terms ‘WannaCry, Petya and Eternal Blue’ sometimes mentioned in the news recently are related to

Answer: (c) Cyber attacks

The terms ‘WannaCry, Petya and EternalBlue’ are all related to Cyber attacks.
Wannacry ransomware locks user’s devices and prevents them from accessing data and software until a certain ransom is paid to its creator.
Petya spreads rapidly through networks that use Microsoft Windows.
EternalBlue is the name given to a software vulnerability in Microsoft’s Windows operating system.

Ransomware is a type of cryptovirological malware that permanently block access to the victim’s personal data unless a ransom is paid.
While some simple ransomware may lock the system without damaging any files, more advanced malware uses a technique called cryptoviral extortion. It encrypts the victim’s files, making them inaccessible, and demands a ransom payment to decrypt them.
In a properly implemented cryptoviral extortion attack, recovering the files without the decryption key is an intractable problem, and difficult-to-trace digital currencies such as paysafecard or Bitcoin and other cryptocurrencies are used for the ransoms, making tracing and prosecuting the perpetrators difficult.
Ransomware attacks are typically carried out using a Trojan disguised as a legitimate file that the user is tricked into downloading or opening when it arrives as an email attachment. However, one high-profile example, the WannaCry worm, traveled automatically between computers without user interaction.