Intro

Public-key cryptography

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私鑰產生公鑰

SSH-Key

ssh-keygen -y -f id_rsa > id_rsa.pub

PEM格式

openssl rsa -in private-key.pem -pubout -out public-key.pem

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公私鑰加解密

公私鑰皆可以非對稱的加解密，例如PHP functions:
– openssl_private_decrypt
– openssl_private_encrypt
– openssl_public_decrypt
– openssl_public_encrypt