04-06-2012, 01:28 PM
Multicast Security
[attachment=24141]
What is Multicast?
Unicast
One-to-one communication
Broadcast
One-to-all communication
Multicast
One-to-many communication
Many-to-many communication
Applications of Multicast
Online chat groups
Streaming video/audio
Videoconferencing
Multiplayer games
Need for Security
Protecting trade secrets
Confidential chat
Government use
Pay-per-view
Online auctions
Why Security is Hard
Open group membership
Anyone can view or insert data into group
Everyone gets same packets
No individualization or customization
Senders need not be members
Can’t control information that goes to the group
Security Solutions
Authentication (senders and receivers)
Identify the members of the group
Access control (senders and receivers)
Restrict membership
Restrict who can send data
Key management
Provide confidentiality and integrity
Fingerprinting
Make each receiver’s data unique
[attachment=24141]
What is Multicast?
Unicast
One-to-one communication
Broadcast
One-to-all communication
Multicast
One-to-many communication
Many-to-many communication
Applications of Multicast
Online chat groups
Streaming video/audio
Videoconferencing
Multiplayer games
Need for Security
Protecting trade secrets
Confidential chat
Government use
Pay-per-view
Online auctions
Why Security is Hard
Open group membership
Anyone can view or insert data into group
Everyone gets same packets
No individualization or customization
Senders need not be members
Can’t control information that goes to the group
Security Solutions
Authentication (senders and receivers)
Identify the members of the group
Access control (senders and receivers)
Restrict membership
Restrict who can send data
Key management
Provide confidentiality and integrity
Fingerprinting
Make each receiver’s data unique