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Asimmetric cryptography (CAP 7) (Public and private, RSA (1977 based on…
Asimmetric cryptography (CAP 7)
Public and private
RSA (1977 based on factoring large prime numbers - 1024 keys)
EL Gamal (1985 - based on Diffie Hellman - it doubles message length - DSA è una variante)
Elliptic curve (160 bits key)
Hash functions (or message digest)
SHA (160 bit message)
MD2 (128 bit message - no one way function)
MD4 (128 bit message - not secure)
MD5 (128 bit message - possible collisions)
Public key infrastructure (PKI)
Certificates (endorsed copy of an individual public key)
Certificate authorities (provides you a digital certificate)
Certificate generation and destruction
enrollment (prove your identity to the CA)
verification (verify the CA digital signature and if it is not revoked)
revocation (a certificate can be compromised, erroneously issued, etc. You can use CRL or OCSP for checking)
Digital signatures (public key + hashing)
HMAC
DSS (use of SHA3 for hashing + DSA,RSA or ECDSA)