Week 13: 1
6-2023 NT219–Cryptography
NT219- Cryptography
PhD. Ngoc-Tu Nguyen
tunn@uit.edu.vn
Week 13: Cryptography Applications (P1)
Week 13: 2
6-2023 NT219–Cryptography
Outline
Network secure protocols
Authentication;
Key agreement;
Cryptographic negotiation;
SSL/TLS; SSH; IPSec; Kerberos;
Blockchain-base network
Lattice-bases cryptography and Post-
quantum security
Week 13: 3
6-2023 NT219–Cryptography
Textbooks and References
Text books
[1] Chapter 14.15
Week 13: 4
6-2023 NT219–Cryptography
Internet
mobile network
home network
enterprise
network
national or global ISP
local or
regional
ISP
datacenter
network
content
provider
network
Network devices:
End devices
Intermediate devices
Send?
Receiver?
Storage?
Communication links
fiber, copper, radio
transmission rate:
bandwidth
Network protocols
How to secure storage and
exchange data?
Motivations
Week 13: 5
6-2023 NT219–Cryptography
Network secure protocols (P1)
Authentication
Public key (Certificate) approach
Prior secret-shared approach
Cryptographic algorithm negotiation
Ciphers, MAC
Key agreement
Diffie-Hellman key exchange + extra…
Secure protocol implementation
Chosent layer to implement
Chosen cipher to encrypt exchange data