Cryptography

Symmetric vs Asymmetric Encryption

• Symmetric -> same key for encyrption and decryption
• Asymmetric -> different (public, private) keys for encryption and Description

RSA

RSA is one of the most used asymmetric algorithm in PKI. It uses the mathematical characteristic that factoring large numbers are extremly difficult. This could become obsolete once quantom computing becomes a reality.

공인 인증서

SSL

Hashing vs Encryption

• Hashing: non-reversible
• Encryptioin: reversible