03-08-2012, 03:11 PM
Basic Model of Multicast Authentication Based On Batch Signature-MABS
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INTRODUCTION
A multicast protocol enables a sender to efficiently
disseminate digital media data to many receivers. Due to
the time-sensitive requirement of some applications,
reliable transmission protocol like TCP (Transmission
Control Protocol) is impractical for multicast. Therefore,
unreliable transmission protocol such as UDP (User
Datagram Protocol) is generally adopted for multicast
applications. Multicast protocol is suitable for many
applications, e.g. video transmissions, live broadcasts,
stock quotes, or news feeds. These applications may
have many receivers or distribute time-sensitive data. To
ensure secure communications between a sender and its
receivers, it is important to implement security measures
in a multicast environment.
PREVIOUS WORKS
In this Paper we are going to consider three
Conventional Broadcasting authentication protocols:
1. VANET
2. VSN
3. DSRC
Vehicular Ad Hoc Networks (VANETs), inherently
provide us a perfect way to collect dynamic traffic
information and sense various physical quantities related
to traffic distribution with very low cost and high
accuracy. Such functionalities simply turn a VANET
into a Vehicular Sensor Network (VSN), which is
considered essential for achieving automatic and
dynamic information collection and fusion in an
Intelligent Transportation System (ITS). VSNs have
been envisioned to have a great potential to
revolutionize human’s driving experiences and create a
fresh new framework in metropolitan-area traffic flow
control, and will undoubtedly take an important part of
the future wireless metropolitan-area networks
Fig.3: A Simple Functionality representation of VANET
Fig.4: A simple Functionality representation of VSN
According to the Dedicated Short Range
Communications (DSRC) protocol, each vehicle in a
VANET broadcasts a traffic safety message every 100-
300 ms, which keeps the vehicle’s driving related
information, such as location, speed, turning intention,
and driving status (e.g., regular driving, waiting for a
traffic light, traffic jam, etc.), to other vehicles. With
multi-hop forwarding, the messages will be either
terminated by an RSU or dropped when exceeding over
their lifetimes.
CONCLUSION
To reduce the signature verification overheads in
the secure multimedia multicasting, block
authentication schemes have been proposed.
Unfortunately, most previous schemes have many
problems such as vulnerability to packet loss and lack of
resilience to denial of service (DoS) attack. MABS is
perfectly resilient to packet loss due to the elimination
of the correlation among packets and can effectively
deal with DoS attack. Moreover, we also show that the
use of batch signature can achieve the efficiency less
than or comparable with the conventional schemes.
Finally, we further develop two new batch signature
schemes based on BLS and DSA, which are more
efficient than the batch RSA signature scheme.