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Internet Engineering Task Force (IETF) W. Kim
Request for Comments: 6209 J. Lee
Category: Informational J. Park
ISSN: 2070-1721 D. Kwon
NSRI
April 2011
Addition of the ARIA Cipher Suites to Transport Layer Security (TLS)
Abstract
This document specifies a set of cipher suites for the Transport
Layer Security (TLS) protocol to support the ARIA encryption
algorithm as a block cipher.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6209.
Copyright Notice
Copyright (c) 2011 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Kim, et al. Informational [Page 1]
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RFC 6209 ARIA Cipher Suites for TLS April 2011
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. ARIA . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Proposed Cipher Suites . . . . . . . . . . . . . . . . . . . . 3
2.1. HMAC-Based Cipher Suites . . . . . . . . . . . . . . . . . 3
2.2. GCM-Based Cipher Suites . . . . . . . . . . . . . . . . . . 3
2.3. PSK Cipher Suites . . . . . . . . . . . . . . . . . . . . . 4
3. Cipher Suite Definitions . . . . . . . . . . . . . . . . . . . 5
3.1. Key Exchange . . . . . . . . . . . . . . . . . . . . . . . 5
3.2. Cipher . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3. PRFs . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.4. PSK Cipher Suites . . . . . . . . . . . . . . . . . . . . . 5
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.1. Normative References . . . . . . . . . . . . . . . . . . . 7
6.2. Informative References . . . . . . . . . . . . . . . . . . 8
1. Introduction
This document specifies cipher suites for the Transport Layer
Security (TLS) [RFC5246] protocol to support the ARIA [RFC5794]
encryption algorithm as a block cipher algorithm. The cipher suites
include variants using the SHA-2 family of cryptographic hash
functions and ARIA Galois counter mode. Elliptic curve cipher suites
and pre-shared key (PSK) cipher suites are also defined.
The cipher suites with SHA-1 are not included in this document. Due
to recent analytic work on SHA-1 [Wang05], the IETF is gradually
moving away from SHA-1 and towards stronger hash algorithms.
1.1. ARIA
ARIA is a general-purpose block cipher algorithm developed by Korean
cryptographers in 2003. It is an iterated block cipher with 128-,
192-, and 256-bit keys and encrypts 128-bit blocks in 12, 14, and 16
rounds, depending on the key size. It is secure and suitable for
most software and hardware implementations on 32-bit and 8-bit
processors. It was established as a Korean standard block cipher
algorithm in 2004 [ARIAKS] and has been widely used in Korea,
especially for government-to-public services. It was included in
PKCS #11 in 2007 [ARIAPKCS]. The algorithm specification and object
identifiers are described in [RFC5794].
Kim, et al. Informational [Page 2]
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RFC 6209 ARIA Cipher Suites for TLS April 2011
1.2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
2. Proposed Cipher Suites
2.1. HMAC-Based Cipher Suites
The first twenty cipher suites use ARIA [RFC5794] in Cipher Block
Chaining (CBC) mode with a SHA-2 family Hashed Message Authentication
Code (HMAC). Eight out of twenty use elliptic curves.
CipherSuite TLS_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x3C };
CipherSuite TLS_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x3D };
CipherSuite TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x3E };
CipherSuite TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x3F };
CipherSuite TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x40 };
CipherSuite TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x41 };
CipherSuite TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x42 };
CipherSuite TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x43 };
CipherSuite TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x44 };
CipherSuite TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x45 };
CipherSuite TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x46 };
CipherSuite TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x47 };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x48 };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x49 };
CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4A };
CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4B };
CipherSuite TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4C };
CipherSuite TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4D };
CipherSuite TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4E };
CipherSuite TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4F };
2.2. GCM-Based Cipher Suites
The next twenty cipher suites use the same asymmetric algorithms as
those in the previous section but use the authenticated encryption
modes defined in TLS 1.2 with the ARIA in Galois Counter Mode (GCM)
[GCM].
Kim, et al. Informational [Page 3]
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RFC 6209 ARIA Cipher Suites for TLS April 2011
CipherSuite TLS_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x50 };
CipherSuite TLS_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x51 };
CipherSuite TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x52 };
CipherSuite TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x53 };
CipherSuite TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x54 };
CipherSuite TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x55 };
CipherSuite TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x56 };
CipherSuite TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x57 };
CipherSuite TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x58 };
CipherSuite TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x59 };
CipherSuite TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5A };
CipherSuite TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5B };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5C };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5D };
CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5E };
CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5F };
CipherSuite TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x60 };
CipherSuite TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x61 };
CipherSuite TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x62 };
CipherSuite TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x63 };
2.3. PSK Cipher Suites
The next fourteen cipher suites describe PSK cipher suites. Eight
cipher suites use an HMAC and six cipher suites use the ARIA Galois
Counter Mode.
CipherSuite TLS_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x64 };
CipherSuite TLS_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x65 };
CipherSuite TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x66 };
CipherSuite TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x67 };
CipherSuite TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x68 };
CipherSuite TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x69 };
CipherSuite TLS_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6A };
CipherSuite TLS_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6B };
CipherSuite TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6C };
CipherSuite TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6D };
CipherSuite TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6E };
CipherSuite TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6F };
CipherSuite TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x70 };
CipherSuite TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x71 };
Kim, et al. Informational [Page 4]
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RFC 6209 ARIA Cipher Suites for TLS April 2011
3. Cipher Suite Definitions
3.1. Key Exchange
The RSA, DHE_RSA, DH_RSA, DHE_DSS, DH_DSS, DH_anon, ECDH, and ECDHE
key exchanges are performed as defined in [RFC5246].
3.2. Cipher
The ARIA_128_CBC cipher suites use ARIA [RFC5794] in CBC mode with a
128-bit key and 128-bit Initialization Vector (IV); the ARIA_256_CBC
cipher suites use a 256-bit key and 128-bit IV.
AES-authenticated encryption with additional data algorithms,
AEAD_AES_128_GCM, and AEAD_AES_256_GCM are described in [RFC5116].
AES GCM cipher suites for TLS are described in [RFC5288]. AES and
ARIA share common characteristics, including key sizes and block
length. ARIA_128_GCM and ARIA_256_GCM are defined according to those
characteristics of AES.
3.3. PRFs
The pseudorandom functions (PRFs) SHALL be as follows:
a. For cipher suites ending with _SHA256, the PRF is the TLS PRF
[RFC5246] using SHA-256 as the hash function.
b. For cipher suites ending with _SHA384, the PRF is the TLS PRF
[RFC5246] using SHA-384 as the hash function.
3.4. PSK Cipher Suites
Pre-shared key cipher suites for TLS are described in [RFC4279],
[RFC4785], [RFC5487], and [RFC5489].
4. Security Considerations
At the time of writing this document, no security problems have been
found on ARIA (see [YWL]).
The security considerations in the following RFCs apply to this
document as well: [RFC4279] [RFC4785] [RFC5116] [RFC5288] [RFC5289]
[RFC5487] and [GCM].
Kim, et al. Informational [Page 5]
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RFC 6209 ARIA Cipher Suites for TLS April 2011
5. IANA Considerations
IANA has allocated the following numbers in the TLS Cipher Suite
Registry:
CipherSuite TLS_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x3C };
CipherSuite TLS_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x3D };
CipherSuite TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x3E };
CipherSuite TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x3F };
CipherSuite TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x40 };
CipherSuite TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x41 };
CipherSuite TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x42 };
CipherSuite TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x43 };
CipherSuite TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x44 };
CipherSuite TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x45 };
CipherSuite TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x46 };
CipherSuite TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x47 };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x48 };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x49 };
CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4A };
CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4B };
CipherSuite TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4C };
CipherSuite TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4D };
CipherSuite TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x4E };
CipherSuite TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x4F };
CipherSuite TLS_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x50 };
CipherSuite TLS_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x51 };
CipherSuite TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x52 };
CipherSuite TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x53 };
CipherSuite TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x54 };
CipherSuite TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x55 };
CipherSuite TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x56 };
CipherSuite TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x57 };
CipherSuite TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x58 };
CipherSuite TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x59 };
CipherSuite TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5A };
CipherSuite TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5B };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5C };
CipherSuite TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5D };
CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x5E };
CipherSuite TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x5F };
CipherSuite TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x60 };
CipherSuite TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x61 };
CipherSuite TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x62 };
CipherSuite TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x63 };
Kim, et al. Informational [Page 6]
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RFC 6209 ARIA Cipher Suites for TLS April 2011
CipherSuite TLS_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x64 };
CipherSuite TLS_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x65 };
CipherSuite TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x66 };
CipherSuite TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x67 };
CipherSuite TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x68 };
CipherSuite TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x69 };
CipherSuite TLS_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6A };
CipherSuite TLS_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6B };
CipherSuite TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6C };
CipherSuite TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6D };
CipherSuite TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 = { 0xC0,0x6E };
CipherSuite TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 = { 0xC0,0x6F };
CipherSuite TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 = { 0xC0,0x70 };
CipherSuite TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 = { 0xC0,0x71 };
6. References
6.1. Normative References
[GCM] Dworkin, M., "Recommendation for Block Cipher Modes of
Operation: Galois/Counter Mode (GCM) and GMAC", NIST
SP 800-38D, November 2007.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC4279] Eronen, P. and H. Tschofenig, "Pre-Shared Key
Ciphersuites for Transport Layer Security (TLS)",
RFC 4279, December 2005.
[RFC4785] Blumenthal, U. and P. Goel, "Pre-Shared Key (PSK)
Ciphersuites with NULL Encryption for Transport Layer
Security (TLS)", RFC 4785, January 2007.
[RFC5116] McGrew, D., "An Interface and Algorithms for
Authenticated Encryption", RFC 5116, January 2008.
[RFC5246] Dierks, T. and E. Rescorla, "The Transport Layer Security
(TLS) Protocol Version 1.2", RFC 5246, August 2008.
[RFC5288] Salowey, J., Choudhury, A., and D. McGrew, "AES Galois
Counter Mode (GCM) Cipher Suites for TLS", RFC 5288,
August 2008.
[RFC5289] Rescorla, E., "TLS Elliptic Curve Cipher Suites with SHA-
256/384 and AES Galois Counter Mode (GCM)", RFC 5289,
August 2008.
Kim, et al. Informational [Page 7]
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RFC 6209 ARIA Cipher Suites for TLS April 2011
[RFC5487] Badra, M., "Pre-Shared Key Cipher Suites for TLS with
SHA-256/384 and AES Galois Counter Mode", RFC 5487,
March 2009.
[RFC5489] Badra, M. and I. Hajjeh, "ECDHE_PSK Cipher Suites for
Transport Layer Security (TLS)", RFC 5489, March 2009.
[RFC5794] Lee, J., Lee, J., Kim, J., Kwon, D., and C. Kim, "A
Description of the ARIA Encryption Algorithm", RFC 5794,
March 2010.
6.2. Informative References
[ARIAKS] Korean Agency for Technology and Standards, "128 bit
block encryption algorithm ARIA - Part 1: General (in
Korean)", KS X 1213-1:2009, December 2009.
[ARIAPKCS] RSA Laboratories, "Additional PKCS #11 Mechanisms",
PKCS #11 v2.20 Amendment 3 Revision 1, January 2007.
[Wang05] Wang, X., Yin, Y., and H. Yu, "Finding Collisions in the
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Kim, et al. Informational [Page 8]
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RFC 6209 ARIA Cipher Suites for TLS April 2011
Authors' Addresses
Woo-Hwan Kim
National Security Research Institute
P.O.Box 1, Yuseong
Daejeon 305-350
Korea
EMail: whkim5@ensec.re.kr
Jungkeun Lee
National Security Research Institute
P.O.Box 1, Yuseong
Daejeon 305-350
Korea
EMail: jklee@ensec.re.kr
Je-Hong Park
National Security Research Institute
P.O.Box 1, Yuseong
Daejeon 305-350
Korea
EMail: jhpark@ensec.re.kr
Daesung Kwon
National Security Research Institute
P.O.Box 1, Yuseong
Daejeon 305-350
Korea
EMail: ds_kwon@ensec.re.kr
Kim, et al. Informational [Page 9]
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