Explain why public-key cryptography is used more than symmetric-key cryptography. Explain whether symmetric-key cryptography is still used in modern security applications (for example, for sending...

CRYPTOGRAPHY

Extracted text: Explain why public-key cryptography is used more than symmetric-key cryptography. Explain whether symmetric-key cryptography is still used in modern security applications (for example, for sending packets in a network). Additionally, cite three practical applications of public-key cryptography (for example, securing financial transaction) and explain why public-key cryptography is the best cryptographic technique in each case. (provide references.)