1. The core of the PKI is the CA
2. PKI functions: Authentication authorization Confidentiality Integrity anti-repudiation 3. The theoretical basis of PKI: cryptography
Digital certificates
Use of digital certificates
PKI and related Technologies (1) Cryptography Basic Concepts plaintext: The message the sender will send
Ciphertext: PlainText is transformed into seemingly meaningless random messages called ciphertext
Secret key
The user holds the key for the cryptographic decryption operation. In symmetric cryptography, encrypted decryption uses the same key
Encryption: The process of converting ciphertext to redact through a key
Decryption: The process of drawing plaintext through keys and ciphertext
The principle of cryptographic algorithm: The secrecy of information depends on the secrecy of the key, the encryption algorithm can be disclosed--all secrets in the key (Kerckhoff hypothesis) (2) Symmetric encryption algorithm
PKI notes (1)
