25-05-2010, 11:42 PM
hi i am lakshmi.i want the topic which is described above in title.i.e.,
cryptography and network security full report
CRYPTOGRAPHY and NETWORK SECURITY ppt for seminar purpose
25-05-2010, 11:42 PM
hi i am lakshmi.i want the topic which is described above in title.i.e., cryptography and network security full report CRYPTOGRAPHY and NETWORK SECURITY ppt for seminar purpose
08-06-2010, 01:25 PM
hey lakshmi ravuri
please read https://seminarproject.net/Thread-crypto...ull-report https://seminarproject.net/Thread-crypto...ull-report https://seminarproject.net/Thread-networ...ort--10704 https://seminarproject.net/Thread-new-tr...ull-report for getting more information of CRYPTOGRAPHY and NETWORK SECURITY i hope you enjoyed it and come again for helping other students issues in this forum
01-11-2010, 11:41 AM
firewall.ppt (Size: 207 KB / Downloads: 381) Cryptography and Network Security Introduction seen evolution of information systems now everyone want to be on the Internet and to interconnect networks has persistent security concerns can’t easily secure every system in org need "harm minimisation" a Firewall usually part of this
07-11-2010, 03:24 PM
Quantum Cryptography:
Quantum cryptography uses quantum mechanics to guarantee secure communication. It enables two parties to produce a shared random bit string known only to them, which can be used as a key to encrypt and decrypt messages. An important and unique property of quantum cryptography is the ability of the two communicating users to detect the presence of any third party trying to gain knowledge of the key. This results from a fundamental part of quantum mechanics: the process of measuring a quantum system in general disturbs the system. A third party trying to eavesdrop on the key must in some way measure it, thus introducing detectable anomalies. By using quantum superpositions or quantum entanglement and transmitting information in quantum states, a communication system can be implemented which detects eavesdropping. If the level of eavesdropping is below a certain threshold a key can be produced which is guaranteed as secure, otherwise no secure key is possible and communication is aborted.The security of quantum cryptography relies on the foundations of quantum mechanics, in contrast to traditional public key cryptography which relies on the computational difficulty of certain mathematical functions, and cannot provide any indication of eavesdropping or guarantee of key security. Quantum cryptography is only used to produce and distribute a key, not to transmit any message data. This key can then be used with any chosen encryption algorithm to encrypt and decrypt a message, which can then be transmitted over a standard communication channel. The algorithm most commonly associated with QKD is the one-time pad, as it is provably secure when used with a secret, random key.
16-02-2011, 12:23 PM
hi, everyone this is jessica.. can any one, send me "Network security and Cryptography" ppt and abstract by evening 4pm please... thank you
19-01-2012, 11:05 AM
to get information about the topic cryptography full report fullreport,ppt and related topic refer the link bellow
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13-02-2012, 01:21 PM
to get information about the topic cryptography and network security projects full report ,ppt and related topic refer the link bellow
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01-11-2012, 01:15 PM
Cryptography and Network Security
Cryptography.ppt (Size: 920 KB / Downloads: 62) Cryptography and Network.ppt (Size: 298 KB / Downloads: 110) Cryptography and Network Security.ppt (Size: 1.09 MB / Downloads: 77) Cryptography1.ppt (Size: 259.5 KB / Downloads: 105) Cryptography2.ppt (Size: 647.5 KB / Downloads: 60) Cryptography3.ppt (Size: 707.5 KB / Downloads: 77) Cryptography and Network 1.ppt (Size: 496 KB / Downloads: 45) Cryptography and Network 2.ppt (Size: 216.5 KB / Downloads: 126) Cryptography and Network 3.ppt (Size: 465 KB / Downloads: 64) Security.ppt (Size: 672.5 KB / Downloads: 41) Network Security.ppt (Size: 439.5 KB / Downloads: 54) Network Security2.ppt (Size: 541.5 KB / Downloads: 118) Network 3.ppt (Size: 206.5 KB / Downloads: 75) Network 1.ppt (Size: 542 KB / Downloads: 51) Network2.ppt (Size: 539 KB / Downloads: 105) Introduction The art of war teaches us to rely not on the likelihood of the enemy's not coming, but on our own readiness to receive him; not on the chance of his not attacking, but rather on the fact that we have made our position unassailable. Background Information Security requirements have changed in recent times traditionally provided by physical and administrative mechanisms computer use requires automated tools to protect files and other stored information use of networks and communications links requires measures to protect data during transmission Definitions Computer Security - generic name for the collection of tools designed to protect data and to thwart hackers Network Security - measures to protect data during their transmission Internet Security - measures to protect data during their transmission over a collection of interconnected networks Aim of Course our focus is on Internet Security which consists of measures to deter, prevent, detect, and correct security violations that involve the transmission & storage of information OSI Security Architecture ITU-T X.800 “Security Architecture for OSI” defines a systematic way of defining and providing security requirements for us it provides a useful, if abstract, overview of concepts we will study Aspects of Security consider 3 aspects of information security: security attack security mechanism security service Security Attack any action that compromises the security of information owned by an organization information security is about how to prevent attacks, or failing that, to detect attacks on information-based systems often threat & attack used to mean same thing have a wide range of attacks can focus of generic types of attacks passive active Security Service enhance security of data processing systems and information transfers of an organization intended to counter security attacks using one or more security mechanisms often replicates functions normally associated with physical documents which, for example, have signatures, dates; need protection from disclosure, tampering, or destruction; be notarized or witnessed; be recorded or licensed Security Services (X.800) Authentication - assurance that the communicating entity is the one claimed Access Control - prevention of the unauthorized use of a resource Data Confidentiality –protection of data from unauthorized disclosure Data Integrity - assurance that data received is as sent by an authorized entity Non-Repudiation - protection against denial by one of the parties in a communication Model for Network Security using this model requires us to: design a suitable algorithm for the security transformation generate the secret information (keys) used by the algorithm develop methods to distribute and share the secret information specify a protocol enabling the principals to use the transformation and secret information for a security service Model for Network Access Security using this model requires us to: select appropriate gatekeeper functions to identify users implement security controls to ensure only authorised users access designated information or resources trusted computer systems may be useful to help implement this model |
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