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# Messages encrypted with your private key can only be decrypted with your public key, proving that the message came from you (authentication)
# Messages encrypted with your public key can only be decrypted with your private key, ensuring that only you can read them (privacy).
# To provide both ensure privacy and authentication on messages between you and another party, encrypt the message twice: once with your private key and once with their public key.
== Practical Considerations ==