Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Recursive Threshold Visual Cryptography Scheme   This paper presents a recursive hiding scheme for 2 out of 3 secret sharing.
In recursive hiding of secrets, the user encodes additional information about
smaller secrets in the shares of a larger secret without an expansion in the
size of the latter, thereby increasing the efficiency of secret sharing. We
present applications of our proposed protocol to images as well as text.

23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th