Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhancements to A Lightweight RFID Authentication Protocol   Vajda and Buttyan (VB) proposed a set of five lightweight RFID authentication
protocols. Defend, Fu, and Juels (DFJ) did cryptanalysis on two of them - XOR
and SUBSET. To the XOR protocol, DFJ proposed repeated keys attack and nibble
attack. In this paper, we identify the vulnerability existed in the original
VB's successive session key permutation algorithm. We propose three
enhancements to prevent DFJ's attacks and make XOR protocol stronger without
introducing extra resource cost.

7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con