Important Characteristics Of The Wigig Technology Computer Science Essay

Important Characteristics Of The Wigig Technology Computer Science EssayWireless Gigabit is an up-and-coming technology expected to change radio receiver connectivity of up to 7Gbps in entropy, uncover and audio applications. The composition sponsoring this technology is the Wireless Gigabit Alliance.Features of WigigSome of the important characteristics of the Wigig technology be listed belowWigig is capable of providing a radio mesh which its speed is up to 7Gbps, while the fastest current 802.11n has theoretically the grittyest speeds up to 600Mbps.WiGig is operated at 60gigahertz which allows a wider sway and supports super-fast conveying speeds. It stooge transfer data between 1Gbps to 7Gbps, 60 times more than Wi-Fi.Wigig can be able to support the Tri band devices.WiGig is a multi-gigabit communion technology which is an ideal received for the use of streaming HD video so it can display full 1080 pixels of the PC to the TV via a wireless meshwork.How does Wigi g worksWigig willing primarily be employ within a genius room to provide wireless connectivity between home entertainment equipment. It will enable very fast data transfers and streaming media which is 10 times speedy than the old wireless technologies, in addition to wireless continuatives for cameras, laptops.DeliverablesTechnical IssuesCurrent and future expectations of WiGig deployment.Types of challenges or difficulties ar at that place related to WiGig execution of instruments.Kinds of organisations energy need these novel standards. protective cover IssuesDiscuss and analyse the pledge issues that might arise due to wide deployment of WiGig Alliance. (802.11 security issue and the Galois/ replica Mode of the AES encoding algorithm)Discuss and analyse cross shape security framework in Wireless LAN deployment. Is that framework will improve security in WLAN or non.Technical IssuesCurrent Wigig deploymentThe industry standard relevant to Wigig is IEEE 802.11ad. Dra ft 1.0 of the specification was published in Jan 2011. Per the draft standard, signals will shoot the unlicensed 60 GHZ frequence band and all 802.11 ad-compliant devices will provide backward compatibility with 802.11 standard. As a result, tri-band devices will operate at 2.4, 5.0 and 60 gigacycle per second.The Wigig specification includes master(prenominal) features to maximize performance, minimize instrumentation complexity and cost, enable backward compatibility with existing Wi-Fi and provide advanced security. unwrap features includeSupport for data transmittance rates up to 7 Gbps.Wigig operates at 60 GHz band that means it has much more spectrum available, the impart argon much wider, enable multi-gigabit data rates. Wigig defines 4 channels, to each one 2.16 GHz wide which is 50 times wider than the channels available in 802.11n.Seamless switching between 2.4/5/60 GHz bandsBased on IEEE 802.11, Wigig provides native Wi-Fi support and enables devices which has tr i-band radios to be able to transparently switch between 802.11 cyberspace operating in any frequency band including 2.4/5/60 GHzSupport for beamforming, a technology which maximize the signal strength and enable robust communication at distances beyond 10 meters.WiGig is integrated a technology, called Beamforming. It allows the radio beam is shot to the right target with the best performance minimize waste in the process of transmission. Thus, WiGig uses dynamism more efficient than traditionalistic Wi-Fi connection.Beamforming employs directional antennas to reduce interference and focus the signal between two devices into a concentrated beam. This allows faster data transmission over longer distances.Beamforming is defined within the PHY and MAC tiers.During the beamforming process, two devices establish communication and then fine-tune their antenna settings to improve the quality of directional communication until there is enough capacity for the desired data transmission. The devices can quickly establish a new communications pathway using beams that reflect glowering walls when an obstacle blocks the line of sight between two devices or if someone walks between them.http//genk2.vcmedia.vn/N0WoyYblO3QdmZFKPMtKnadHAHTevz/Image/2012/04/2_6a565.jpgAdvanced security using the Galois/Counter Mode of the AES encryption algorithm.AES-GCM is an authenticated encryption algorithm designed to provide some(prenominal) authentication and privacy. Developed by David A McGrew and John Viega, it uses universal hashing over a binary Galois field to provide authenticated encryption.GCM was designed argumentationally as a way of supporting very high data rates, since it can take reinforcement of pipelining and parallel processing techniques to bypass the normal limits imposed by feedback MAC algorithms. This allows authenticated encryption at data rates of many ten of Gbps, permitting high grade encryption and authentication on placement which previously could n ot be fully protected.Different types of layers take part in the working of the wireless gigabit technology, physical layer (PHY) deals with all the devices of low and high power and maintain the status of communication.Protocol adaption layers (PALs) are being developed to support specific system interfaces including data buses for PC peripherals and display interfaces for HDTVs, monitors and projectors.Supplements and ext blocks the 802.11 culture medium Access Control(MAC) layer and is backward compatible with the IEEE 80211 standardPower ManagementWigig devices can take advantage of a new enumerationd access mode to reduce power consumption. Two devices communicating with each other via a directional link may schedule the periods during which they communicate in between those periods, they can sleep to save power.802.11 ad draft standard is compared to other wireless technologyhttp//images-news.easyvn.net/upload/2011/12/08/ obligate/cong-nghe-khong-day-60-ghz-cho-docking-usb- hdmi_3.jpgWigig in futureWGA has announced the prepare of a new wireless connection standard, Wigig 1.1 ready for certification. The Wigig 1.1 is added 2 new PALs specifications, the Wigig Display mention (WDE) and Wigig Serial appendage (WSE) to supplement the previously published Wigig Bus Extension (WBE) and MAC/PHY specifications.Structure of WigigWigig is defined in 2 layers based on IEEE 802.11. They are personal and Medium Access Control layers. These layers enable native support for IP networking over 60Ghz band. They make simpler and less expensive to produce devices that can communicate over both Wigig and existing Wi-Fi using tri-band radios (2.4GHz, 5GHz and 60 GHz).http//farm3.static.flickr.com/2390/5791077356_c2146fb4f0.jpgPhysical LayerThe physical layer of the 802.11 ad standardized 2 wireless data exchange techniquesOrthogonal frequency-division multiplexing (OFDM) wholeness carrier (SC)The 802.11ad divides the 60GHz band into four 2.16 GHz wide channels. Data rates of up to 7 Gbits/s are possible using OFDM with disparate intonation schemes. A single channel rendition for low power operation is available and can deliver a speed up to 4.6 Gbits/s. These wide channels enable WIgig to support applications that require extremely fast communication, much(prenominal) as uncompressed video transmission.The PHY in 802.11ad is split into Physical Layer Convergence Protocol (PLCP) and the Physical Medium Dependent (PMD) sub layers. The PLCP parses data units transmitted/received using various 802.11 media access techniques. The PMD performs the data transmission/reception and modulation/demodulation directly accessing look under the guidance of the PLCP. The 802.11 ad MAC layer to great extend is affected by the nature of the media. For instance, it implements a relatively complex for the second layer fragmentation of PDUs.Medium Access Control (MAC) layerWigig shares MAC layer with existing 802.11 networks enables session switching between 8 02.11 networks operating in the 2.4 GHz, 5GHz and 60 GHz bands, resulting in uninterrupted wireless data communications. The 802.11 ad MAC layer has been extended to include beamforming support and address the 60 GHz specific aspects of channel access, synchronization, association and authentication.Protocol Adaption Layer (PALs)PAL is a layer added to network transmissions to help adapt to older standards. It allows wireless implementations of key computer and consumer electronics interfaces over 60GHz Wigig networks. The version 1.0 A/V and I/O protocol adaption layer (PAL) specifications perplex been developed to support specific system interfaces including extensions for PC peripherals and display interfaces for HDTVs, monitors and projectors.The Wigig Bus Extension (WBE)Define high-performance wireless implementations of widely utilise computer interfaces over 60GHz.Enable multi-gigabit wireless connectivity between any two devices, such as connection to storage and other hig h-speed peripheralsThe Wigig Display Extension (WDE)Support wireless transmission of audio/visual dataEnable wireless DisplayPort and other display interfaces that include the High-bandwidth Digital Content Protection 2.0 feature.Offers key A/V applications, such as the transmission of lightly compressed or uncompressed video from a computer or digital camera to an HDTV, monitor or projector.http//img84.imageshack.us/img84/2195/fig2m.jpgModulation Coding Scheme (MCS)The specification supports two types of modulation and coding schemes, which provide different benefits. Orthogonal frequency-division multiplexing (OFDM) supports communication over longer distances with greater delay spreads, providing more flexibility in handling obstacles and reflected signals. The single carrier, suited to lower applications, achieves a data rate up to 4.6 Gbits/s, while OFDM enables 7 Gbits/s.Usage ModelsWigig has a high compatibility and is used for many purposes.Wigig can act as an alternative m ethod which is used for replacing old connectivity standards such as USB, DisplayPort, PCIe and HDMI. In addition, it is backward compatible with most devices which using 802.11 connectivity in the 2.4 GHz and 5 GHz bands. The main exit of Wigig is to connect home entertainment devices together tablets, smartphones, PC, TV and more.http//images-news.easyvn.net/upload/2011/12/08/article/cong-nghe-khong-day-60-ghz-cho-docking-usb-hdmi_2.jpgChallenges or difficulties are there related to WiGig implementations.The biggest technical challenge is that these networks will operate in much higher frequencies, around 60 GHz. The higher the frequency is, the greater the propagation loss over distance. Another challenge is 60 GHz radio are absorbed by wood, bricks, human body and particularly paint are far more opaque to 60 GHz waves. Thus, Wigig is most suitable for in-room applications.Attenuation of various materials by frequencyBesides that, the beamforming of compliant equipment postula te to be within line of sight of receiving devices in run to work well. Even a person stepping between two communicating devices can break the signal. With these weaknesses, they will prevent Wigig from being implemented popularly in the future. Moreover, most today devices only if support 802.11 a/g/n it will take time to replace all these devices with new devices which support 802.11ad standard.Kinds of organisations might need these new standardsWiGig is a multi-gigabit communication technology which is an ideal standard for the use of streaming HD video so it can display full 1080 pixels of the PC to the TV via a wireless network. In addition, its speed is up to 7 Gbps which is very useful for so many organizations such asMultimedia organization (newspapers, advertisement, movie)Financial organization (Bank, office, tax)Education organization (TAFE, university)Medical organization (Hospital)IT organization (Intel, Dell, Apple etc.)GovernmentMilitarySecurity IssuesDue to Wigig is based on IEEE 802.11 standards it has the comparable security issues with 802.11 a/b/g/n.Easy to accessWireless LANs are easy to find. To enable clients to find them, networks must transmit Beacon frames with network parameters. The information needed to join a network is also the information needed to launch an attack on a network. Beacon frames a not processed by any privacy functions, which means that your 802.11 network and its parameters are available for anybody with an 802.11 card. Attackers with high-gain antennas can find networks from in force(p)by roads or buildings and may launch attacks without having physical access to your facility. beginning Enforce Strong Access ControlEnsuring that wireless networks are subject to conceptive access control can apologise the risk of wireless network deployment. earningss should place access points outside of security perimeter devices such as firewalls, and administrators should consider using VPNs to provide access to the bodily network. Strong exploiter authentication should be deployed, preferably using new products based on the IEEE 802.1x standard. 802.1x defines new frame types for drug user-based authentication and leverages existing enterprise user databases, such as RADIUS.Rogue Access PointsEasy access to wireless LANs is coupled with easy deployment. When combined, these two characteristics can cause headaches for network administrators and security officers. each user can run to a nearby computer store, purchase an access point, and connect it to the corporate network without authorization. Rogue access deployed by end users poses great security risks. End users are not security experts, and may not be aware of the risks posed by wireless LANs. Many deployments that have been logged and mapped by war drivers do not have any security features enabled, and a significant fraction have no changes from the default configuration.Solution veritable(a) Site AuditsLike any other network technol ogy, wireless networks require vigilance on the part of security administrators. The obvious way to find self-appointed networks is to do the same thing that attackers do use an antenna and look for them so that you find unlicensed networks before attackers exploit them. Physical site audits should be conducted as frequently as possible.Unauthorized Use of ServiceSeveral war drivers have published results indicating that a clear majority of access points are put in service with only minimal modifications to their default configuration. Unauthorized users may not necessarily obey your service providers terms of service, and it may only take one spammer to cause your ISP to revoke your connectivity.Solution Design and Audit for Strong AuthenticationThe obvious defence against unauthorized use is to prevent unauthorized users from accessing the network. Strong, cryptographically protected authentication is a precondition for authorization because access privileges are based on user i dentity. VPN solutions deployed to protect traffic in pass through across the radio link provide strong authentication.MAC Spoofing and Session Hijacking802.11 networks do not authenticate frames. Every frame has a source address, but there is no guarantee that the station sending the frame actually put the frame in the air. Just as on traditional Ethernet networks, there is no protection against forgery of frame source addresses. Attackers can use spoofed frames to redirect traffic and corrupt ARP tables. At a much simpler level, attackers can observe the MAC addresses of stations in use on the network and adopt those addresses for malicious transmissions.Attackers can use spoofed frames in active attacks as well. In addition to hijacking sessions, attackers can exploit the lack of authentication of access points. Access points are identified by their broadcasts of Beacon frames. Any station which claims to be an access point and broadcasts the right service set identifier (SSID, also commonly called a network name) will appear to be part of an authorized network. Attackers can, however, slow pretend to be an access point because nothing in 802.11 requires an access point to prove it really is an access point. At that point, the attacker could potentially slue credentials and use them to gain access to the network through a man-in-the-middle (MITM) attack.Solution Adopt Strong Protocols and Use ThemUsing methods based on dishonour Layer Security (TLS), access points will need to prove their identity before clients provide authentication credentials, and credentials are protected by strong cryptography for transmission over the air.Session hijacking can be prevented only by using a strong cryptographic protocol such as IPsec.Using strong VPN protocols which require the use of strong user authentication with 802.1x.Traffic Analysis and Eavesdropping802.11 provides no protection against attacks which passively observe traffic. The main risk is that 802.11 do es not provide a way to take prisoner data in transit against eavesdropping. Frame headers are always in the clear and are visible to anybody with a wireless network analyser.Security against eavesdropping was supposed to be provided by Wired Equivalent Privacy (WEP). However, it protects only the initial association with the network and user data frames. Management and control frames are not encrypted or authenticated by WEP, leaving an attacker wide latitude to disrupt transmissions with spoofed frames.Solution Perform Risk AnalysisWhen addressing the threat of eavesdropping, the key decision is to balance the threat of using only WEP against the complexity of deploying a more proven solution.If wireless LAN is being used for sensitive data, WEP may very well be insufficient for your needs. Strong cryptographic solutions like SSH, SSL, and IPsec were designed to transmit data securely over public channels and have proven resistant to attack over many years, and will almost certai nly provide a higher level of security.Key Problems with WEPRepeat in key stream which allows easy decryption of data for a moderately sophisticated adversary.Weak implementation of the RC4 algorithm leads to an efficient attack that allows key recoverySubject to brute force attacks (Short Keys)Easily compromised keys (Shared keys/No Key management)Message modification is possibleNo user authentication occursSubject to Man in the Middle attacksWPABenefitsImproved CryptographyStrong Network access controlWill Support 802.1x, EAP, EAP-TLS, Radius, and Pre-Placed KeysKey ManagementReplay ProtectionProvides for data and header unityFlawsWhile (Temporal Key Integrity Protocol) TKIP (a message integrity check algorithm is to verify the integrity of the packets) Michael significantly improve WEP security, design limitations result in cryptographic weaknesses.Limitations of Michael to retrieve the keystream from short packets to use for re-injection and spoofing.WPA2BenefitsStrong Cryptog raphySupport for Legacy EquipmentStrong Network Access ControlWill Support 802.1x, EAP, EAP-TLS, Radius, and Pre-Placed KeysKey ManagementReplay ProtectionProvides for data and Header IntegrityRoaming SupportSecurity issue there is a flaw that was discovered. It is called WPS (wireless protected setup) it is the little initial setup that most new/newer routers come with. The WPS is a button which we need to hit when we want to initially set up connection. That is the security flaw thats used now to crack wpa/wpa2. There is a free program to exploit this flaw (reaver) and it has about a 100% success rate in cracking wpa/wpa2.Galois/Counter Mode (GCM)GCM is a block cipher mode of operation providing both confidentiality and data origin authentication. It was designed by McGrew and Viega.BenefitsSupport communication speeds of 10 GbpsProvides strong encryption based on the Advanced Encryption Standard (AES)Be able to implement in hardware for performance and efficiencySecurity IssuesGC M provides no message authenticationThere are some security issues if GCM mode is used incorrectly. GCM is not suited for use with short tag lengths or a very long message. The user should monitor and limit the number of unsuccessful verification attempts for each key. It is strongly recommended to use all 16 bytes for the tag, and generally no less than 8 bytes. The same length of tag must always be used for a given key. The initialization vector (IV) must be unique for each operation for a given key. Security is destroyed for all textbook encrypted with the same key if the IV is used for different plaintext. Using 12 bytes randomly generated IV is ok and so is a counter that is controlled over so that it can never be repeated.Cross layer security framework in Wireless LAN deploymentCross-layer design appears to be a suitable improvement for future contributions in the framework of WLANs able to address emerging issues related to ever-higher performance, energy consumption, mobi lity.The single layer security is often inefficient and inadequate for provisioning secure data transmission in WLAN. In generally, the security of a network is determined by the security it has over all the layers. Thus, the cross-layer security framework needs to be proposed in WLAN.The security framework may support many components like intrusion staining system, Trust framework and adapted link layer communication protocol. In order to carry out practical cross-layer security framework in WLAN, we need to followComponent based security Security measures must be provided to all the components of a protocol stack as well as to the entire network. The developers should focus on securing the entire network.Robust, simple and ductile designs Security mechanisms should construct a trustworthy system out of untrustworthy components and have the capability to detect and function when need arises. This should also support scalability. respective(a) types of active and passive attacks h ave been recorded in WLANA denial of service (DoS) attack In DoS attack, a malicious lymph node could prevent another node to go back to sleep mode which in turn causes battery depletion.Eavesdropping and invasion If no sound security measures are taken, invasion becomes fairly an easy task due to wireless communication. An adversary could easily extract useful information from the unattended nodes. Hence, a malicious user could join the network undetected by impersonating as some other legitimate node, to have access to secret data, disrupt the network operations, or survey the activity of any node in the network.Physical node tampering leading to node compromising.Forced battery exhaustion of a node.Radio muddle at the physical layer.There are some types of cross-layer securityCross-layer security design for intrusion detectionAll approaches pertaining to intrusion detection schemes have been cerebrate on routing and MAC protocols. The existing secure protocols or intrusion de tection schemes are normally presented for one protocol layer. So, the effect of these schemes is sandwiched to attacks to a particular layer. They are seldom effective to attacks from different protocol layers however, security concerns may arise in all protocol layers. It is necessary to have a cross-layer based detection framework that consolidates various schemes in various protocol layers.Cross-layer security design for power efficiencyAs previously mentioned, energy conservation is one of the native concerns for sensor networks design, so it should be considered across protocol layers from the beginning stage through subsequent stages of the design to achieve the trade-off between energy consumption, network performance and complexity, and maximize the longevity of the entire network. Our cross-layer approach can achieve this while providing network security provisioning. For instance, the carrier detection is responsible for DoS attacks. A pestiferous or malicious node can exploit then interplays in MAC layer to frequently request for channels. This not only prohibits other nodes from connecting with the destination, but also can deplete its battery energy due to frequent responses. To overcome this issue, the information can be collected from other layers and the detrimental node can be recognized and then be limited or isolated.ConclusionAfter analysing the security risks of WLAN and investigating the advantages of cross-layer security framework, I believe that the cross-layer design is a unique candidate to improve security in WLAN.SummaryWigig or 802.11ad based on the 802.11 standard is a new wireless technology which provides data rates up to 7Gbps over the unlicensed 60 GHz. It will primarily be used within a single room to provide wireless connectivity between home entertainment equipment. It will enable very fast data transfers and streaming media which is 10 times faster than the old wireless technologies. However, Wigig still has some challe nges which are the limitation of propagation loss and distance. That is why it can primarily be used within a room or an office. But Wireless Gigabit Alliance claimed that Wigig can be used beyond 10 meters by using beamforming technology in the near future.