Week 4 - Discussion: Symmetric Encryption: DES, AES, and Key Management

 

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Discussion Prompt:

Symmetric encryption algorithms like DES and AES are widely used to secure data, but they come with key management and key exchange challenges.

• Explain how symmetric encryption works, focusing on the structure of DES, including the Feistel network and the role of S-boxes.
• How does AES improve upon DES in terms of security and efficiency?
• In your response, also discuss the challenges of key management and key exchange in symmetric encryption systems. Why is securely exchanging keys such a critical issue, and what solutions or strategies are commonly used to address this challenge?

Peer Reply Guidance:

Respond to at least two peers with substantive paragraphs.