Public-Key Cryptography and Key Management
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To use data encryption algorithms in network communications, all parities must first agree on using the same secret keys
Rely on couriers
Set up a meeting to determine a secret key
Use postal service, email service, phone service
…
However, these conventional methods are inflexible for network communication applications
Public-key cryptography (PKC)
Invented in the 1970’s
Without the need of sharing prior secrets to distribute secret keys securely
Can also be used for authentication
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Public-Key Cryptography and Key Management
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Public-Key Cryptography and Key Management
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