Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Self-Authentication and Deniable Efficient Group Key Agreement
  Protocol for VANET   With the rapid development of vehicular ad hoc Network (VANET), it is gaining
significant popularity and receiving increasing attentions from academics and
industry in security and efficiency. To address security and efficiency issues,
a self-authentication and deniable efficient group key agreement protocol is
proposed in this paper. This scheme establishes a group between road-side unit
(RSU) and vehicles by using self-authentication without certification
authority, and enhances certification efficiency by using group key (GK)
transmission method. At the same time, to avoid the attacker to attack the
legal vehicle by RSU, we adopt deniable group key agreement method to
negotiation session key (sk) and use it to transmit GK between RSU. In
addition, vehicles not only broadcast messages to other vehicles, but also
communicate with other members in the same group. So group communication is
necessary in VANET. Finally, the security and performance analysis shown that
our scheme is security, meanwhile the verification delay, transmission
overheard and message delay are more efficient than other related schemes in
authentication, transmission and communication.

2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg