communication security over the internet the big picture
play

Communication security over the Internet The big picture Me - PowerPoint PPT Presentation

Oct 09, 2022 •14 likes •244 views

Communication security over the Internet The big picture Me Internet Resource Internet Server Client Attack vectors MAN DNS LAN Client Internet Back Bone Router Networking WWW overview MITM (Man In The Middle) 3 2 4 5 LAN

  1. Communication security over the Internet

  2. The big picture Me Internet Resource Internet Server Client Attack vectors

  3. MAN DNS LAN Client Internet Back Bone Router Networking WWW overview

  4. MITM (Man In The Middle) 3 2 4 5 LAN 2 3 Router Internet 1 1 AV: Spoofing

  5. Use WPA! Sniffer Don't use WEP! Router W-LAN Internet AV: Sniffing

  6. HTTP network capture

  7. Encryption Enc ncryp ypt Decrypt

  8. Encrypted channel ???!!! %#$ %#$ %#$ Internet c c a a b b b b a a c c

  9. HTTPS Capture

  10. HTTPS (TLS/SSL) 4. da data 3. keys 2. certificate 1. requ quest Client Server

  11. AV: Phishing my-bank.com % % # # %#$ $ $ my-bamk.com

  12. Resolver Root NS NS where? 1. where is “m-b” where? my-bank.com there! where? NS there! Other NS there! % % # # $ $ AV: DNS my-bank.com

  13. CA SSL / Certificates delegate CA 3. verify s s i i g g n n 5. da data 4. keys 2. certificate 1. requ quest Client Server

  14. SSL in action (1)

  15. SSL in action (2)

  16. SSL in action (3)

  17. SSL in action (4)

  18. SSL missing in action ???!!!

  19. ??? Huh ???

  20. Check “SHA1 Fingerprint”!!! Don't rely on “MD5 Fingerprint”!!!

  21. The explanation!

  22. Email security Browser Outlook IMAPS Use GnuPG! HTTPS My-Mail Extra-Mail ??? ;)

  23. Keep focus!

Recommend

Securing Internet Communication: TLS, contd Network security CS 161: Computer Security Prof.

Securing Internet Communication: TLS, contd Network security CS 161: Computer Security Prof.

Securing Internet Communication: TLS, contd Network security CS 161: Computer Security Prof. Raluca Ada Popa Feb 27, 2018 Some slides credit David Wagner Announcements Midterm grades released Regrades: Read the follow-ups on the

1.75k views • 156 slides
Internet communication The internet A redundant, decentralized communication network

Internet communication The internet A redundant, decentralized communication network

Internet communication The internet A redundant, decentralized communication network connecting computers all over the world Data is sent in packets between machines Communication between computers is routed using the Internet

464 views • 7 slides
Securing Internet Communication CS 161: Computer Security Prof. Vern Paxson TAs: Devdatta

Securing Internet Communication CS 161: Computer Security Prof. Vern Paxson TAs: Devdatta

Securing Internet Communication CS 161: Computer Security Prof. Vern Paxson TAs: Devdatta Akhawe, Mobin Javed & Matthias Vallentin http://inst.eecs.berkeley.edu/~cs161/ March 31, 2011 Todays Lecture Applying crypto technology in

695 views • 51 slides
Security Protocols Q: Why security protocols? Bob Alice A: To allow reliable communication over

Security Protocols Q: Why security protocols? Bob Alice A: To allow reliable communication over

Security Protocols Q: Why security protocols? Bob Alice A: To allow reliable communication over an untrusted channel (eg. Internet) 2 Security Protocols are out there Authentication Confidentiality Example: HTTPS (HTTP + TLS)

669 views • 42 slides
Securing Internet Communication: TLS CS 161: Computer Security Prof. Haojin Materials adopted

Securing Internet Communication: TLS CS 161: Computer Security Prof. Haojin Materials adopted

Securing Internet Communication: TLS CS 161: Computer Security Prof. Haojin Materials adopted from Prof. David Wagner 2018 Todays Lecture Applying crypto technology in practice Two simple abstractions cover 80% of the use cases

623 views • 49 slides
Anonymous Communication and Internet Freedom CS 161: Computer Security Prof. David Wagner May 2,

Anonymous Communication and Internet Freedom CS 161: Computer Security Prof. David Wagner May 2,

Anonymous Communication and Internet Freedom CS 161: Computer Security Prof. David Wagner May 2, 2013 oday Goals For T State-sponsored adversaries Anonymous communication Internet censorship State-Sponsored Adversaries Anonymous

974 views • 58 slides
Securing Internet Communication: TLS CS 161: Computer Security Prof. Vern Paxson TAs: Paul

Securing Internet Communication: TLS CS 161: Computer Security Prof. Vern Paxson TAs: Paul

Securing Internet Communication: TLS CS 161: Computer Security Prof. Vern Paxson TAs: Paul Bramsen, Apoorva Dornadula, David Fifield, Mia Gil Epner, David Hahn, Warren He, Grant Ho, Frank Li, Nathan Malkin, Mitar Milutinovic, Rishabh Poddar,

873 views • 56 slides
Securing Internet Communication: TLS & DNSSEC CS 161: Computer Security Prof. Vern Paxson

Securing Internet Communication: TLS & DNSSEC CS 161: Computer Security Prof. Vern Paxson

Securing Internet Communication: TLS & DNSSEC CS 161: Computer Security Prof. Vern Paxson TAs: Paul Bramsen, Apoorva Dornadula, David Fifield, Mia Gil Epner, David Hahn, Warren He, Grant Ho, Frank Li, Nathan Malkin, Mitar Milutinovic,

1.51k views • 92 slides
The Internet Security Alliance The Internet Security Alliance is a collaborative effort with

The Internet Security Alliance The Internet Security Alliance is a collaborative effort with

The Internet Security Alliance The Internet Security Alliance is a collaborative effort with Carnegie Mellon University. It is a cross-sector, internationally- based trade association devoted to cyber security. ISA has individual corporate

349 views • 30 slides
Usable Security of Named Data Networking Yingdi Yu 1 Traditional communication model of

Usable Security of Named Data Networking Yingdi Yu 1 Traditional communication model of

Usable Security of Named Data Networking Yingdi Yu 1 Traditional communication model of Internet Speaking to a host end-to-end channel Communication security container-based authenticity: X.509, Certificate

678 views • 57 slides
Networking & Security Networking & Security each packet is routed individually (internet,

Networking & Security Networking & Security each packet is routed individually (internet,

One-Slide Summary Bandwidth is the throughput of a communication resource, measured in bits per second. Latency is the time delay between the moment when communication is initiated and the moment the first bit arrives, measured in seconds.

359 views • 10 slides
Networking & Security Networking & Security each packet is routed individually (internet,

Networking & Security Networking & Security each packet is routed individually (internet,

One-Slide Summary Bandwidth is the throughput of a communication resource, measured in bits per second. Latency is the time delay between the moment when communication is initiated and the moment the first bit arrives, measured in seconds.

482 views • 11 slides
1 <Insert Picture Here> C++, Java and .NET: Lessons learned from the Internet Age, and

1 <Insert Picture Here> C++, Java and .NET: Lessons learned from the Internet Age, and

1 <Insert Picture Here> C++, Java and .NET: Lessons learned from the Internet Age, and What it Means for the Cloud and Emerging Languages Cameron Purdy Vice President, Development Overview <Insert Picture Here> A retrospective of

656 views • 41 slides
Network Security Architecture 1 Additional Reading Firewalls and Internet Security:

Network Security Architecture 1 Additional Reading Firewalls and Internet Security:

Network Security Architecture 1 Additional Reading Firewalls and Internet Security: Repelling the Wily Hacker, Cheswick, Bellovin, and Rubin. New second edition Firewall and Internet Security, the Second Hundred (Internet)

801 views • 78 slides
Internet Security Summary ITS335: IT Security Sirindhorn International Institute of Technology

Internet Security Summary ITS335: IT Security Sirindhorn International Institute of Technology

ITS335 Internet Security Internet Security Secure Email Internet Security Summary ITS335: IT Security Sirindhorn International Institute of Technology Thammasat University Prepared by Steven Gordon on 20 December 2015 its335y15s2l10,

450 views • 25 slides
The Internet Security Alliance The Internet Security Alliance is a collaborative effort between

The Internet Security Alliance The Internet Security Alliance is a collaborative effort between

The Internet Security Alliance The Internet Security Alliance is a collaborative effort between Carnegie Mellon Universitys Software Engineering Institute (SEI) and its CERT Coordination Center (CERT/CC) and the Electronic Industries Alliance

294 views • 10 slides
Internet Security HTTPS SSH CSS441: Security and Cryptography Sirindhorn International

Internet Security HTTPS SSH CSS441: Security and Cryptography Sirindhorn International

CSS441 Internet Security Web Security TLS/SSL Internet Security HTTPS SSH CSS441: Security and Cryptography Sirindhorn International Institute of Technology Thammasat University Prepared by Steven Gordon on 20 December 2015

832 views • 32 slides
Internet of Things Security A Survey by Avi Webberman Outline What is the Internet of Things

Internet of Things Security A Survey by Avi Webberman Outline What is the Internet of Things

Internet of Things Security A Survey by Avi Webberman Outline What is the Internet of Things (IoT)? Why is IoT Security so Important? Dyn DDOS Attack What are the security challenges of an IoT network? A Proposed Taxonomy

176 views • 14 slides
Outline Preliminaries: Internet protocols, PKI, X.509, Encoding Internet Security

Outline Preliminaries: Internet protocols, PKI, X.509, Encoding Internet Security

Outline Preliminaries: Internet protocols, PKI, X.509, Encoding Internet Security Protocols Application layer security (email) PGP, S/MIME Transport layer security Bart Preneel SSL / TLS June 2003 Network layer

571 views • 19 slides
ICANN & Internet Security (DNS) Security Albert Daniels Albert.daniels@icann.og Internet

ICANN & Internet Security (DNS) Security Albert Daniels Albert.daniels@icann.og Internet

ICANN & Internet Security (DNS) Security Albert Daniels Albert.daniels@icann.og Internet Week Guyana 11 th October 2017 | 1 What Does ICANN Mean for the End User? POLIC Y The Domain Name System Policy Development is an L-Root is one

636 views • 32 slides
Communication security: Formal models and proofs Hubert Comon September 1, 2016 1 Introduction

Communication security: Formal models and proofs Hubert Comon September 1, 2016 1 Introduction

Communication security: Formal models and proofs Hubert Comon September 1, 2016 1 Introduction to protocol security The context (I) credit cards contactless cards telephones online transactions cars, fridges,... Internet of

680 views • 11 slides
The Economy is reliant on the Internet The state of Internet security is eroding quickly. Trust

The Economy is reliant on the Internet The state of Internet security is eroding quickly. Trust

The Economy is reliant on the Internet The state of Internet security is eroding quickly. Trust in online transactions is evaporating, and it will require strong security leadership for that trust to be restored. For the Internet to remain the

433 views • 29 slides
Cyber Security on Nutanix at Nutanix want to use and select Insert . Resize the picture to fit

Cyber Security on Nutanix at Nutanix want to use and select Insert . Resize the picture to fit

TO CUSTOMIZE WITH A NEW PICTURE Delete the current picture, if there is one. On the Insert tab, click the Pictures button. Navigate to the image you Cyber Security on Nutanix at Nutanix want to use and select Insert . Resize the picture to fit

1.42k views • 22 slides
COMPUTER-INTERNET SECURITY How am I vulnerable? 1 COMPUTER-INTERNET SECURITY Virus

COMPUTER-INTERNET SECURITY How am I vulnerable? 1 COMPUTER-INTERNET SECURITY Virus

COMPUTER-INTERNET SECURITY How am I vulnerable? 1 COMPUTER-INTERNET SECURITY Virus Worm Trojan Spyware Adware Messenger Service 2 VIRUS VIRUS A virus must meet two A computer virus is a small criteria:

525 views • 23 slides

More recommend