NASA Scientific and Technical Aerospace Reports

we present a series of lessons learned based on a pilot experiment in which we explored the performance of two organizations
(functional and divisional) performing a single mission, which in this case, was not designed to favor a particular organization.
The lessons learned here suggest a variety of empirical strategies to further our investigations, including measures of
performance, rigorous attention to team and mission definitions, and precise planning of training structure. Our findings
suggest that each of these factors has the potential to profoundly influence the results, reflecting the multiple factors that shape
team performance.
DTIC
Command and Control; Congruences; Organizations
20060002073 National Inst. of Information and Communications Technology, Tokyo, Japan
Journal of the National Institute of Information and Communications Technology. Special Issue on Information
Security, Volume 52, Nos. 1/2
Takahashi, Tetsuo, Editor; Tawara, Yasuo, Editor; Watanabe, Katsuya, Editor; Tomita, Fumihiko, Editor; Kurihara, Noriyuki,
Editor; Okada, Kazunori, Editor; March/June 2005; 313 pp.; In English; See also 20060002074 - 20060002101; Original
contains color and black and white illustrations; Copyright; Avail.: Other Sources
Contents include the following: 1. Researches on Information Security in NICT. Technologies for Security of the Internet.
Study on Process Model for Internet Risk Analysis. Design and Phase-1 Development of Secure Overlay Networks. A
Development of Experimental Environments ‘SIOS’ and ‘VM Nebula’ for Reproducing Internet Security Incidents.
Buffer-Overflow Detection in C Program by Static Detection. Efficient Traceback Method for Detecting Illegal Access. Log
Management System Based on Distributed Database Using P2P Network. The Mathematics Models and an Actual Proof
Experiment for IP Traceback System. Detecting Unknown Computer Viruses -A New Approach. Countermeasures Against
Information Leakage. Subgroup Membership Problem and Its Applications to Information Security. A Functional
Cryptosystem Using a Group Action. A Generalized Harley Algorithm for Genus Two Hyperelliptic Curves. An Expansion
Algorithm for Higher Order Differential Cryptanalysis of Secret Key Ciphers. A Study on Higher Order Differential
Cryptanalysis of 64 Bit Block Cipher KASUMI. On Multi Rounds Elimination Method for Higher Order Differential
Cryptanalysis. Error Detection and Authentication in Quantum Key Distribution. Information Hiding on Digital Documents
by Adjustment of New-line Positions..
CASI
Computer Information Security; Computer Viruses; Management Systems; Information Systems
20060002080 National Inst. of Information and Communications Technology, Japan
A Functional Cryptosystem Using a Group Action
Yamamura, Akihiro; Journal of the National Institute of Information and Communications Technology. Special Issue on
Information Security, Volume 52, Nos. 1/2; March/June 2005, pp. 101-110; In English; See also 20060002073; Copyright;
Avail.: Other Sources
The main purpose of this paper is to examine applications of group cryptography. We construct a backward deterministic
system employing the action of the modular group on the upper half plane and the amalgamated free product structure of the
group. We invent a geometrical algorithm that finds the normal form of an element of the modular group effectively. This
algorithm makes our backward deterministic system tractable. Using the backward deterministic system, we invent a
public-key cryptosystem in terms of a functional cryp system.
Author
Algorithms; Cryptography; Group Theory; Modularity
20060002099 National Inst. of Information and Communications Technology, Tokyo, Japan
Limiting the Holding Time in Mobile Cellular Phone Systems During Disasters
Okada, Kazunori; Journal of the National Institute of Information and Communications Technology. Special Issue on
Information Security, Volume 52, Nos. 1/2; March/June 2005, pp. 289-299; In English; See also 20060002073; Copyright;
Avail.: Other Sources
Call demand suddenly and greatly increases during major disasters, because people want to check on their families and
friends in the stricken area. Many call attempts in mobile cellular systems are blocked due to limited radio frequency
resources. In this paper, as a solution to this problem, limiting the holding time of calls is investigated and a dynamic holding
time limit (DHTL) method, which varies the holding time limit dynamically based on the number of call attempts is proposed.
The effect of limiting holding time is investigated first using a computer simulation with a constant and heavy traffic load
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