This is mostly because the only other entity between the source and the ... ... middle of paper ... ...acket. This will require the TCP layer to be enhanced to identify and handle different types of errors. 802.11 uses CSMA/CA to sense if the channel is idle before making a transmission. The exponential back off strategy can adversely impact performance. So in situations where there are more than a certain number('N') of hosts accessing the same wireless link, we can have an arbiter that decides which host has access to the link.
Protect mesh backhaul Mesh networks provide advantages including redundancy of links and scalability. The links between the wireless access points have to be secured, the information sent through their links must be encrypted, if their links are not secured, potential hackers can have the possibility of attacking the attached wired network. It is imperative to deploy Cisco Aironet 1500 Lightweight access points, which support AES encryption to address the security concerns between mesh backhaul links. Using the 4.9Ghz licensed band The 4.9Ghz licensed band can be used only by public safety agencies; the transmission of sensitive data can be transmitted using this frequency band. It is important to note that the use of this band will segment communications from general users as well as interference that their devices may cause.
The only real complaint that we heard about Wi-Fi is that there are security issues. Hackers have been known to drive around accessing people’s wireless networks. So security is an issue. One way to deal with security is to use WEP (wired equivalent privacy). This technology allows us to use wireless and still have some of the same protection as with a wired network.
An attacker may claim spoofed information that a particular legitimate mobile node is in different location than where it really is. If home agent believes that information and works based on it, then the respective mobile node may not get the traffic at all. A malicious mobile node may use the home address of a victim legitimate node in forged binding update sent to a correspondent node. These kinds of attacks generate the threats against the confidentiality, integrity and availability of the mobile nodes. An attacker may go through the contents of a packet destined to another node by redirecting the traffic to it.
By proposing a simple solution that lets the users configure their wireless access points for best possible security, the problem can be nipped in the bud. References: Wireless infidelity I: war driving Hal Berghel September 2004 Communications of the ACM , Volume 47 Issue 9 http://www.securitycentral.org.nz/wardriving/ “Bruteforcing Wireless Protected Setup” by Stefan Viehböck http://sviehb.wordpress.com/ WarDriving & Wireless Penetration Testing By Russ Rogers, Frank Thornton Wi-Fi Security: Stewart Miller
The works by Jacoby et.al have identified techniques such that a greedy malware would always do certain malicious activity like scanning, or sending SMS which would be identified in their power consumption behavior. Figure 11: Bridged Mode for execution The idea of maintaining platform-diversity could be an effective solution to reducing the number of malwares. A single malware would be rendered ineffective when there is a completely different interface connecting any two mobile devices. Yan et.al suggests using a two layer protection mechanism to counter mobile malware. One of the layers is encountered is while installing the app.
SECURITY OF WIRELESS COMMUNICATIONS Introduction Wireless devices, like all technologies that provide external access to corporate networks, present security challenges. With wireless standards and practices still rapidly evolving, it is important to understand the strengths and limitations of available technologies in order to implement a secure solution. Extending current security policies to encompass wireless devices requires an understanding of the security features of both wireless devices and wireless networks. Purpose of the Study The purpose of the study was to assist in the decision whether Lotus Development should extend current security policies to encompass wireless devices. The following are critical security questions: • What challenges are faced with wireless security?
2. Current Environment The following is extracted from the TAD: The security implemented within the existing stores RF environment relies on three elements; the fact that the technology used is quite obscure, the fact that the frequency changes frequently and the fact that a MAC address list is implemented through the use of an in-house application called Hyena. The Frequency Hopping wireless network makes use of a technology which allows the FH enabled wireless devices and the FH Access Points to switch frequencies simultaneously at regular rapid intervals. This makes capturing or sniffing conversations tricky and would mean that anyone wis... ... middle of paper ... ... Additionally if the key on any device of a particular type that falls under PCI is suspected of being compromised then an incident needs to be raised and the incident response plan followed, probably resulting in the keys on all devices of that type being changed immediately to maintain M&S’s compliance. IPOS-08 The current planned dates for the I-POS 08 delivery indicate that new hardware will begin to be deployed to the stores between September and October this year and with a completion date of mid-08 for the tills.
This is where wireless network security comes into play. It is the prevention of unauthorized access of damage to computer using wireless networks. There are three main forms of wireless networking security: MAC Address Filtering, Wireless Authentication and Data Encryption. In addition there are also several smaller things that can be done like RF shielding. Each vary in who they protect and the level of protection they offer MAC Address Filtering The first method is Mac Address filtering which most wireless access points (WAP) support.
Detecting Wireless LAN MAC Address Spoofing Abstract An attacker wishing to disrupt a wireless network has a wide arsenal available to them. Many of these tools rely on using a faked MAC address, masquerading as an authorized wireless access point or as an authorized client. Using these tools, an attacker can launch denial of service attacks, bypass access control mechanisms, or falsely advertise services to wireless clients. This presents unique opportunities for attacks against wireless networks that are difficult to detect, since the attacker can present himself as an authorized client by using an altered MAC address. As nearly all wireless NICs permit changing their MAC address to an arbitrary value – through vendor-supplied drivers, open-source drivers or various application programming frameworks – it is trivial for an attacker to wreak havoc on a target wireless LAN.