निम्नलिखित में से कौन सा एक दुर्भावनापूर्ण या संदिग्ध प्रोग्राम का संकेत नहीं देता है?

Which of the following is considered 'Malware'?

'Phishing' is best described as a type of:

What is the primary role of a digital signature in secure electronic communication?