NASA Scientific and Technical Aerospace Reports
NASA Scientific and Technical Aerospace Reports
NASA Scientific and Technical Aerospace Reports
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the information exchange at the interface between nodes, the transient behavior of protocols under failure, the placement of<br />
enforcement functionality at the edges or inside the network, <strong>and</strong> the detailed control over resource allocation inside of routers.<br />
We will deliver a suite of network protocols - for routing, transport, multicast, <strong>and</strong> real -time - which have enforceable<br />
behavior without trust.<br />
DTIC<br />
Protocol (Computers); Wide Area Networks<br />
20040111588 Air Force Inst. of Tech., Wright-Patterson AFB, OH<br />
Fault Tolerance in Networked Control Systems Through Real-Time Restarts<br />
Graham, Scott R.; Jul. 22, 2004; 22 pp.; In English<br />
Report No.(s): AD-A425652; AFIT-CI04-491; No Copyright; Avail: CASI; A03, Hardcopy<br />
Networked control consists of sensors <strong>and</strong> actuators that interact with the ‘real world’ environment (plant), which are<br />
connected to each other <strong>and</strong> to with controllers over digital networks. Such systems are long- running, have real-time<br />
requirements, <strong>and</strong> should function in a correct <strong>and</strong> timely manner even in the presence of failures <strong>and</strong> software upgrades.<br />
Arguably, the growth <strong>and</strong> the widespread use of the Internet, the largest operational distributed system today, has been enabled<br />
by its fault-tolerant properties such as robustness to router <strong>and</strong> link failures. As such systems take on an increasingly critical<br />
role, supporting local <strong>and</strong> national infrastructures, homes <strong>and</strong> industries, the importance of reliability <strong>and</strong> availability issues<br />
grows.<br />
DTIC<br />
Actuators; Fault Tolerance; Real Time Operation<br />
20040111614 Department of Defense, Fort Meade, MD<br />
Department of Defense Password Management Guideline<br />
Apr. 12, 1985; 38 pp.; In English<br />
Report No.(s): AD-A425705; CSC-STD-002-85; No Copyright; Avail: CASI; A03, Hardcopy<br />
The DoD Password Management Guideline provides a set of good practices directed toward preventing password<br />
compromise. Large numbers of ADP systems require identification <strong>and</strong> authentication of a system user. Of ten, the<br />
authentication mechanism implemented is a password--a ‘symbol’ that should be known only by its owner. Since a user’s<br />
identification is often a compaction of the individual’s name <strong>and</strong> thus easily guessed, the password must provide the requisite<br />
protection. Measures suggested for password protection include: a. Use of machine-generated pronounceable passwords<br />
(pass-phrases). b. Maximum length of time for password retention. c. Capability to change a password. d. Personal password<br />
protection (e.g., not written down).<br />
DTIC<br />
Computer Information Security; Defense Program<br />
20040112038 <strong>NASA</strong> Glenn Research Center, Clevel<strong>and</strong>, OH, USA<br />
Securing Sensitive Flight <strong>and</strong> Engine Simulation Data Using Smart Card Technology<br />
Blaser, Tammy M.; [2003]; 15 pp.; In English; 2003 Super Computing Conference, 17-20 Nov. 2003, Phoenix, AZ, USA<br />
Contract(s)/Grant(s): 302-15-20; No Copyright; Avail: CASI; A03, Hardcopy<br />
<strong>NASA</strong> Glenn Research Center has developed a smart card prototype capable of encrypting <strong>and</strong> decrypting disk files<br />
required to run a distributed aerospace propulsion simulation. Triple Data Encryption St<strong>and</strong>ard (3DES) encryption is used to<br />
secure the sensitive intellectual property on disk pre, during, <strong>and</strong> post simulation execution. The prototype operates as a secure<br />
system <strong>and</strong> maintains its authorized state by safely storing <strong>and</strong> permanently retaining the encryption keys only on the smart<br />
card. The prototype is capable of authenticating a single smart card user <strong>and</strong> includes pre simulation <strong>and</strong> post simulation tools<br />
for analysis <strong>and</strong> training purposes. The prototype’s design is highly generic <strong>and</strong> can be used to protect any sensitive disk files<br />
with growth capability to urn multiple simulations. The <strong>NASA</strong> computer engineer developed the prototype on an interoperable<br />
programming environment to enable porting to other Numerical Propulsion System Simulation (NPSS) capable operating<br />
system environments.<br />
Author<br />
Computerized Simulation; Flight Simulation; Prototypes; Coding; Simulation; Supercomputers<br />
20040121017 <strong>NASA</strong> Langley Research Center, Hampton, VA, USA<br />
Design <strong>and</strong> Analysis Tools for Concurrent Blackboard Systems<br />
McManus, John W.; [1991]; 9 pp.; In English; No Copyright; Avail: CASI; A02, Hardcopy<br />
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