Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental quantum secure network with digital signatures and
  encryption   Cryptography promises four information security objectives, namely,
confidentiality, integrity, authenticity and nonrepudiation, to support
trillions of transactions every year in the digital economy. Efficient digital
signatures, ensuring the integrity, authenticity and nonrepudiation of data
with provable security, are highly urgent and intractable open problems. Here,
we propose a protocol of high-efficiency quantum digital signature using secret
sharing, one-time universal$_2$ hashing and the one-time pad. We just need to
use a 384-bit key to sign documents of up to $2^{64}$ lengths with a security
bound of $10^{-19}$. If one megabit document is signed, the signature
efficiency is improved by more than $10^8$ times compared with previous quantum
digital signature protocols. Furthermore, we build the first all-in-one quantum
secure network integrating provably secure communication, digital signatures,
secret sharing and conference key agreement and experimentally demonstrate this
signature efficiency advantage. Our work completes the cryptography toolbox of
the four information security objectives.

23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an