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Communication Security (Cryptography, Digital Signatures & PKI)

Confidentiality — What it guarantees over the wire / Primary cryptographic primitive?
What it guarantees over the wire: Only the intended recipient can read the bytes; Primary cryptographic primitive: Encryption (AES-256 symmetric, RSA/ECC asymmetric)
Integrity — What it guarantees over the wire / Primary cryptographic primitive?
What it guarantees over the wire: The bytes received are bit-for-bit what was sent; Primary cryptographic primitive: Hashing (SHA-256/3) + MAC / HMAC
Availability — What it guarantees over the wire / Primary cryptographic primitive?
What it guarantees over the wire: The channel is usable when needed; Primary cryptographic primitive: DDoS mitigation, redundancy, BGP-anycast, scrubbing
Authenticity — What it guarantees over the wire / Primary cryptographic primitive?
What it guarantees over the wire: The sender is the claimed party (not an imposter); Primary cryptographic primitive: Digital signature + X.509 certificate + PKI
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