Nippon Telegraph and Telephone Corporation (TOKYO:9432) and Mitsubishi
Electric Corporation (TOKYO:6503) announced today that in collaboration
with the University of Fukui they have jointly developed an
authenticated encryption algorithm offering robust resistance to
multiple misuse. The algorithm has been entered in the Competition for
Authenticated Encryption: Security, Applicability, and Robustness
(CAESAR) project, based on which the algorithm is expected to be
deployed for increasingly secure and reliable information technology.
The new algorithm's major advantage is its resistance to multiple misuse
in authenticated encryption operations that provide simultaneous
confidentiality and integrity.
One problem of misuse is an attacker making a fake message if plaintexts
are released before their integrity is verified. Once a conventional
system outputs decrypted plaintext from tampered data without
authentication, the attacker can show tampered data as being
non-tampered. Whereas this occurs with many conventional systems, the
new algorithm fixes the problem, thereby enabling relatively low-memory
devices to handle large-volume data.
Another typical problem is the reuse of nonce. In the case of a common
authentication algorithm called Advanced Encryption Standard with Galois
Counter Mode (AES-GCM), a non-repeatable special parameter, or nonce, is
required to achieve security. However, the algorithm is largely bleached
if the nonce is reused, so the new algorithm fixes this problem to
maintain security even after multiple reuse.
The new algorithm accepts messages longer than the 64-gigabyte limit of
AES-GCM, and it works faster than AES-GCM on many platforms.
CAESAR is a competition organized to thoroughly evaluate authenticated
encryption algorithms by testing their resistance to multiple
third-party cryptanalyzing attacks to prove their security,
applicability and robustness. Algorithms that receive third-party
cryptanalysis throuh CAESAR are expected to gain wide acceptance, which
is why this new algorithm has been submitted to the competition.
Candidate algorithms will be screened annually and the first results
will be announced on January 15, 2015, with the final results to be
announced on December 15, 2017.
Based on the results of the CAESAR competition, NTT and Mitsubishi
Electric intend to research and develop services and products for
machine-to-machine (M2M) applications incorporating their new algorithm,
thereby contributing to increased security and reliability in
Cryptography is widely used to establish secure and reliable information
technology by encrypting data with symmetric-key cryptography. However,
symmetric-key cryptography does not necessarily prove data integrity. To
prove data integrity, an authentication algorithm Message Authentication
Code is required to detect forgery. Conventional algorithms can achieve
either confidentiality or integrity. Combining the two is possible, but
presents many problems. For example, recent threats to SSL/TLS involving
attacks with BEAST (2011), BREACH (2013) and Lucky Thirteen (2013) have
highlighted misuse problems. Authenticated encryption offers concrete
instantiations, but the method is not used widely because its benefits
are not fully recognized. In addition, conventional algorithms have
demonstrated certain problems with weak keys.
About Nippon Telegraph and Telephone Corporation
NTT (Nippon Telegraph and Telephone Corporation) is the world's largest
global IT and telecommunications services company and is ranked 32nd on
Fortune's Global 500 list. The company's roots go back over 100 years to
the introduction of the telegraph in Japan and focuses today on
innovation in the cloud, mobility, network and communications. The
company had operating revenues of over US$130 billion for the fiscal
year ended March 31, 2013 and employs 227,150 people worldwide. The
company's subsidiaries include Regional Communications Businesses: NTT
EAST, NTT WEST; Mobile Communications Businesses: NTT DOCOMO;
Long-Distance and International Communication Businesses: NTT
Communications and Dimension Data; and Data Communication Businesses:
NTT DATA. For more information, visit http://www.ntt.co.jp/index_e.html
About Mitsubishi Electric Corporation
With over 90 years of experience in providing reliable, high-quality
products, Mitsubishi Electric Corporation (TOKYO:6503) is a recognized
world leader in the manufacture, marketing and sales of electrical and
electronic equipment used in information processing and communications,
space development and satellite communications, consumer electronics,
industrial technology, energy, transportation and building equipment.
Embracing the spirit of its corporate statement, Changes for the Better,
and its environmental statement, Eco Changes, Mitsubishi Electric
endeavors to be a global, leading green company, enriching society with
technology. The company recorded consolidated group sales of 3,567.1
billion yen (US$ 37.9 billion*) in the fiscal year ended March 31, 2013.
For more information visit http://www.MitsubishiElectric.com*At
an exchange rate of 94 yen to the US dollar, the rate given by the Tokyo
Foreign Exchange Market on March 31, 2013
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