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components of an information systemthe components of an information system are software data hardware people procedures and networks these 6
nstissc security modelthe nstissc security model provides a detailed perspective on security while the nstissc model covers the 3 dimensions of
confidentialityconfidentiality of information ensures that only those with sufficient privileges may access specific information when unauthorized
example 3 logic bombsin the year 2000 timothy lloyd was found responsible of causing 10 million and 12 million of damage to omega engineering an
example ucsf medical centerin the year 2002 the university of california san francisco ucsf medical center received an email message from someone
example softbank ndash theft of consumer data for extortionsoftbank of japan offers broadband internet services across japan through 2 subsidiaries
what is information securityinformation security protects information and facilities and systems which store use and transmit it from a broad range
what is informationinformation comprises the meanings and interpretations which people place upon the facts or data the value of information springs
what key which if used to encrypt the ciphertext again would give back the plaintext ie key is a weak key define a formula for identifying weak
the following message was enciphered with a vigenegravere
limitations of firewallfirewalls cannot protect a network if security rules are not followed properly by an organization or if the rules are not
advantages and disadvantage of packet filtering firewall advantages one screening router can help protect entire networkone key advantage of
dynamic packet filteringdynamic packet filtering is also referred to as stateful firewalling here the firewall maintains the status of connections as
stateless packet filteringstateless or static packet filtering is the most straightforward kind of packet filtering that allows or disallows data
packet filtering firewallpacket filtering is a network security mechanism that works by controlling what data can flow in and out of the network the
screened subnet architecturethis setup provides an extra security layer to screened host architecture by creating a perimeter subnet which further
screened host architecturethis architecture consists of two host machines a screening router and a screening host screening router is placed between
dual homed host architecturethis setup consists of a host machine with two or more ip addresses for each of its physical port one port is connected
screening routerin this setup network router acts as a firewall it checks all incoming and outgoing packets according to the predefined rules this
how does a firewall protectfirewalls work by controlling the information that comes in and out of the network by using the application proxy service
firewall is a device or a component that restricts access between a protected or an internal network from an external or untrustworthy network a
firewallsfirewalls emerged as a new technology in 1990s but its idea was present near two decades back historical context of firewall is quite
parts count methodthis prediction method is applicable at preliminary stages during bid proposal and early design phases when insufficient
introductionreliability prediction is an important method for evaluating a system design right from its
fault tree construction rulesa define the undesired fault condition as the top event the fault event describes