About Lesson
Key Distribution Methods
Secure distribution of cryptographic keys is one of the most challenging aspects of key management. Common methods include:
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Pre-shared Keys:
- Keys are exchanged offline or through a secure channel before communication begins.
- Used in symmetric encryption systems.
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Public Key Infrastructure (PKI):
- PKI facilitates the secure exchange of public keys and the verification of key authenticity through digital certificates.
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Diffie-Hellman Key Exchange:
- A mathematical method allowing two parties to securely derive a shared secret over an insecure channel.
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Key Wrapping:
- Keys are encrypted with another key (a wrapping key) before being transmitted.
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Out-of-Band Communication:
- Keys are shared through a separate channel, such as physically delivering a key on a USB device.