a model for network security

... steam or the creation of a false stream in a WSN  Mote-class versus laptop-class attacks: In moteclass (sensor-class) attacks, an adversary attacks a WSN by using a few nodes with similar capabilities ... sensor network wireless Tiny Sec Data and Information spoofing, Message Replay Attack Data and Information spoofing, Message Replay Attack Traditional sensor network wireless Traditional sensor network ... ways The inside attacker may have partial key material and the trust of other sensor nodes Inside attacks are much harder to detect External attacks may cause passive eavesdropping on data transmissions,...

Ngày tải lên: 05/03/2014, 23:20

... (few false positive cases), but has a low recall (many false negative cases) Any sequence with a variation is ignored by the automata and it is difficult to get exhaustive adjective and verb semantic ... Contain−Known−Adjective Contain−Known−Noun Contain No−Contain Contain−Known−Verb Contain No−Contain Start−Proposition Star No−Start LCR−Automata Match No−match Figure 1: A Bayesian Network for ... on a task which is more complex than the classification of it occurences: the resolution of anaphora References S Aubin, A Nazarenko and C Nedellec 2005 Adapting a General Parser to a Sublanguage...

Ngày tải lên: 17/03/2014, 22:20

... This game can also called an average effort security game 4 Harikrishna, Venkatanathan and Pandu Rangan Full protection is a social optimum in security games In [15], the authors analyze the full ... of a security game is non-empty 10 Harikrishna, Venkatanathan and Pandu Rangan Proposition In a security game in partition function form containing na > active players and np > passive players, ... where a subset of the players are allocated higher payoffs Ideal Allocation Consider an allocation vector x, where all active players are assigned equal payoff, while all passive players are assigned...

Ngày tải lên: 22/03/2014, 15:21

... ≠ α , and M s is an the dispersion and the mean or median of the distribution alpha-stable random measure on R with Lebesque A random variable X that follows an alpha-stable control measure The ... new network traffic model advanced distribution with the above parameters is denoted by X ~ Sα (σ , β , µ ) in this paper is based on the Linear Fractional Stable Noise scale and location parameters, ... and c are Table.1 The parameters of alpha-stable processes measured by actual network data Data sets Sequence of packets α β σ µ 1~100000 packets 1.3635 1.0000 13.5331 4.8294 100001~200000 packets...

Ngày tải lên: 14/11/2015, 08:03

... Modification Fabrication attack on Availability Confidentiality Integrity Authentication Table Attack Classification Active attack 1.1 Direct attack on CIA Spoofing (Masquerade) Replay Modification ... Release of message contents Traffic Analysis Table Some active attack threat examples Threat Bacteria Worm Virus Trojan horse Logic bomb Active attack DoS blind attack blind attack root access ... this way then messages may be attacked, but this would be an indirect attack on CIA The stages of an active attack to gain control of a system (table 6) are adapted from Cates (2003) Steps – are...

Ngày tải lên: 14/02/2014, 16:20

... Information Theory: Structural Models for Qualitative Data Thousand Oaks, CA: Sage, 1986 [7] R Cavallo and G Klir, “Reconstructability analysis of multi-dimensional relations: A theoretical basis ... II BACKGROUND AND DATASETS Information essentially quantifies “the amount of uncertainty” contained in data [1] Consider a random variable that may take discrete values Suppose we randomly sample ... the average flow size in packets and bytes are at least packets and 320 bytes, and their variand ) are fairly high In contrast, abilities ( and have small average flow size with clusters in low variability,...

Ngày tải lên: 14/02/2014, 16:20

... s Argentina • Australia • Austria • Belgium • Brazil • Bulgaria • Canada • Chile • China PRC • Colombia • Costa Rica • Croatia Czech Republic • Denmark • Dubai, UAE • Finland • France • Germany ... • Romania • Russia • Saudi Arabia • Scotland • Singapore • Slovakia • Slovenia • South Africa • Spain • Sweden S w i t z e r l a n d • Ta i w a n • T h a i l a n d • Tu r k e y • U k r a i n ... and analyzed data on the impact of malicious code attacks, hacking and intrusion incidents, and the cost of system downtime for several years Much of this work dates backs as far as the early...

Ngày tải lên: 14/02/2014, 16:20

... Ed., parsina Natural Lanquaqe Academic Press, London, England: 117149 Fass, Dan and Wilks, Yorick 1983 Preference Semantics, Ill-Formedness, and Metaphor American iournal of computational linauistics ... Kartunnen, Lauri and Zwicky, Arnold M., Eds., Natural lanquaqe parsinq Cambridge University Press, Cambridge, England: 307-319 Robinson, Jane J 1982 DIAGRAM: A Grammar for Dialogues Communications ... 1977 A Framework for Speech Understanding Ph.D Dissertation, Stanford University, Stanford, California Pereira, Fernando C 1985 A New Characterization of Attachment Preferences In: Dowty, David...

Ngày tải lên: 22/02/2014, 10:20

... and Komlodi, A (2006) Focusing on context in network traffic analysis IEEE Computer Graphics and Applications, 26(2):72–80 [Kamada and Kawai, 1989] Kamada, T and Kawai, S (1989) An algorithm for ... statistical and networking experts, the need for visual analytics as a means to combine automatic and visual analysis methods steadily grows along with increasing network traffic and escalating alerts ... all netflows passing the university gateway into the database, aggregated them the traffic /24 prefixes An aggregating SQL query calculates the data for each node and loads it into the visualization...

Ngày tải lên: 05/03/2014, 23:20

... standards: the International Consultative Committee for Telephone and Telegraph (CCITT), ISO, American National Standards Institute (ANSI), the National Standards Association (NSA), the National ... divide constraints into three categories: applicable standards, network type and topology, and organizational Applicable Standards-This material should specify the standards that must be adhered to ... organization need not be rigid Attack recovery is presented in [3] as an optional feature attached to data integrity services We take a broader view by treating it as a separate service category...

Ngày tải lên: 05/03/2014, 23:20

... amyloid formation pathways, any sequence able to be accommodated in a b-sheet conformation can, potentially, reach the amyloid state [51,56] Amyloid-like properties of bacterial IBs Protein aggregation ... furiosus and its application in a process of batch starch degradation to alpha-D-glucose-1-phosphate J Ind Microbiol Biotechnol 35, 219–223 38 Nahalka J, Vikartovska A & Hrabarova E (2008) A crosslinked ... Escherichia coli Microb Cell Fact 9, 41–53 ´ 18 Vera A, Aris A, Carrio M, Gonzalez-Montalban N & Villaverde A (2005) Lon and ClpP proteases participate in the physiological disintegration of bacterial...

Ngày tải lên: 06/03/2014, 00:20

... report 540, M.I.T Artificial Intelligence Laboratory, Cambridge, MA A Yamada, T Yamamoto, H Ikeda, T Nishida, and S Doshita 1992 Reconstructing spatial image from natural language texts In Proc ... representation of RDs, we need a prototypical model of their referent which is the route We have decomposed it into a path and landmarks A path is made up of transfers and relays Relays are abstract ... (landmarks), or a turn and a landmark, mentioned in the text immediately one after •the other Concerning the ambiguity related to the location of landmarks, one can either choose an arbitrary...

Ngày tải lên: 08/03/2014, 07:20

... Whittingham 1997) Males in a group form a dominance hierarchy, with older males being more dominant Groups larger than pairs generally form through natal philopatry of males, although occasionally males ... The median age of the male was years (range 1–10) for yearling-female pairs, years (2 –11) for yearling-female groups, years (2–11) for older-female pairs and years (1–11) for older-female groups; ... occupy an area of 40 ha, of which 27 are planted with native Australian plants Most of the remainder is natural woodland, which is contiguous with the woodland of Canberra Nature Park The birds are...

Ngày tải lên: 14/03/2014, 16:20

... processor that runs at 133MHz and it has 64 MB of RAM It also has a Type Compact Flash card reader, USB, PCMCIA a 10/100Base-T Ethernet interface and an alphanumeric LCD and keypad interface B System ... System Architecture A The Hardware Platform Considering the focus of this paper, which is to evaluate the practicality of a low-end Embedded Linux Platform for a relatively average speed computer network ... Figure Smurf Attack Diagram The above diagram shows a structure of Smurf Attack The attacker sends a stream ICMP echo packets to the router at 128kbps The attacker modifies the packets by changing...

Ngày tải lên: 14/03/2014, 22:20

... software or hardware that can intercept the traffic passing through a local area network (LAN) cable A packet sniffer can be used for both beneficial and malicious purposes: (i) To analyze network ... of the SA The SPI and the partner IP address are used to index to the Security Association Database (SADB) that has information about the characteristics of different SAs A SA is characterized ... intruder can tap the wire and read radiated signals through inductance without making physical contact with the cable An intruder intercepting the signals on a broadband cable has to separate the targeted...

Ngày tải lên: 14/03/2014, 22:20

... more pathogenic for humans T-even Phages        Icosahedral capsid head containing DNA Central tube surrounded by a sheath Collar Base plate Tail pins Fibers Similar stages as animal viruses ... effect is called transformation Oncoviruses- mammalian viruses capable of initiating tumors Viruses that Infect Bacteria  Bacteriophage  Most contain dsDNA  Often make the bacteria they infect ...   Ivanovski and Beijerinck showed that a disease in tobacco was caused by a virus Loeffler and Frosch discovered an animal virus that causes foot –and-mouth disease in cattle Many years of...

Ngày tải lên: 15/03/2014, 12:58

... QuickChange method (Stratagene, La Jolla, CA, USA) The primer sequences were as follows: 5¢-GG GGT GTT ATG GTT TCC CAT CGA TCT GAA GAA ACT GAA GAC (G376E) and 5¢-CCA TTC TTG AAC GTT TTA AAC GGT GAT ... was increased by approximately 103 for the G376E variant: at mgÆmL)1 and 15 °C, the protein was partially dissociated The Kd value for the G157D variant was also increased, but by a smaller amount, ... samples, A Padovani for making the W56F variant and J A Kornblatt for encouragement and advice Financial support was provided by the Natural Sciences and Engineering Research Council of Canada 12 13...

Ngày tải lên: 16/03/2014, 06:20

... the parser has to simultaneously perform two tasks: Searching for a path to be analysed and analysing it as well If the analysis procedure is too liberal, it may already accept and analyse an ungrammatical ... semantic predicates, a list of scopal constraints, syntactic, prosodic and pragmatic information as well as tense and aspect and sortal information An example of a VIT for the sentence Montag ist gut ... length and coverage of the individual analyses The length is defined as the length of the temporal interval an analysis spans; an analysis with a greater length is preferred The coverage of an analysis...

Ngày tải lên: 17/03/2014, 07:20

... Nature 460, 909–913 89 Hong H, Takahashi K, Ichisaka T, Aoi T, Kanagawa O, Nakagawa M, Okita K & Yamanaka S (2009) Suppression of induced pluripotent stem cell generation by the p53–p21 pathway ... a CD34+ hESC-derived starting population has been considered as a potential AIDS therapy, and as a way to alleviate secondary effects produced by anti-retroviral drugs [16] Various studies have ... from Leukemia and Lymphoma UK, Fanconi New advances in human hematopoiesis from human ESCs Hope UK and the Fanconi Anemia Research Fund USA, and funds for research in the field of regenerative medicine...

Ngày tải lên: 22/03/2014, 17:20

... designated as a a, head±tail, and b±b The a a dimer has a diad and is characterized as helix-helix packing between the two monomers, as shown in Fig 2A The head±tail dimer is formed by a crystallographic ... diffraction data were collected using an in-house Rigaku rotating anode X-ray generator with a MAR Research MAR345 image plate detector The radiation Ê wavelength was 1.5418 A The crystal diffracted ... 1.4 A added to the van der Waals radius Dimer model Buried surface Ê area (A2 ) Hydrogen bonds Salt bridges A 77Arg A 65Glu A 65Glu A 61Glu A 58Glu None P212121 a a 1009 A 65Glu OE1±B 62Tyr OH, A...

Ngày tải lên: 23/03/2014, 21:21