Bluetooth Connection
Bluetooth: What is and how it works
I know many experienced computer users never give an idea of Bluetooth. "Oh, yes, I think that's built into my laptop but I never use" is a common refrain. Initially considered as the technology finally free us from the horrors of multiple tangled wires, Bluetooth did not catch on as quickly as expected. Until recently, only many were not useful (with the emphasis on "useful") Bluetooth devices available – at least not for desktop computers. Computer users hand (like my iPAQ) approved the technology more quickly, allowing us to easily connect portable keyboards, headsets, printers, etc. our portable devices (which often do not have a lot of connection ports, such as desktops and laptops do). Bluetooth-enabled mobile phones to allow you to connect a PDA or laptop to the Internet through them.
Bluetooth is designed to be the basis for the Personal Area Network (PAN) – A way for devices in relatively close proximity to communicate wirelessly with others. The range for Bluetooth transmissions varies from approximately 1 meter up to 100 meters, depending on the kind of power the device. Thus, most powerful (Class 1) can communicate over a distance of more than 300 feet, similar to a typical Wi-Fi network.
Since 802.11b and g, Bluetooth transmits in the 2.4GHz frequency radio. Its speed is limited to around 1 Mbps (much slower than Wi-Fi, but still more or less equivalent to a typical broadband connection to the internet). Use LMP (Link Manager Protocol) to handle connections between devices.
Bluetooth Security Issues
Bluetooth can operate in one of three security models:
1. is not security.
2. provides security at the level of service, after the formation of the channel.
3. provides security at the link level, before setting up the channel.
Each Bluetooth device has a unique 48-bit address of device. The authentication scheme is the challenge-response, symmetric keys, and encryption is done with a key that can be up to 128 bits (negotiated by communication devices, each device has a maximum length defined). A 128-key random bits link deals with security transactions between two or more devices.
When two Bluetooth devices establish a communication channel, both of creating an initialization key. A key or PIN is the password and Inititalization is created, and the link key is calculated using. Then the link key is used for authentication.
The concern for safety first is the password or PIN. As with any key, longer keys are safer than short ones. If a hacker is able to find the passkey, you can calculate the possible initiation key, and after that, when calculating the binding key. Making longer key will be much harder to perform the first step.
The initial key exchange is done through a non-encrypted connection, making it especially vulnerable. The best thing is that this part of BT device connection process takes place in a more physically secure (ie, where it is unlikely any lurkers with BT devices that could intercept communications). A hacker could record transmissions sent through the frequency of BT and use to create the PIN.
Instead of using the same passkey fixed all the time, should be changed frequently (how often depends on the types of devices and the security level required).
Link keys can be key or key combination of the unit. The best security practice is to use the combination keys of keys instead of unity. When using a unit key, you must use the same key for all secure transactions, and the key must be shared with other trusted devices. This means that any device can access trusted traffic with other trusted devices with this key.
You can use the Bluetooth address to identify a particular device (and associated user) and recording transactions, which can create privacy problems.
Why Bluetooth Security Matter?
Many users only use Bluetooth technology to connect a wireless headset or similar device to their laptops, and may wonder why security is a big problem. Implementation of security, even for these types of pairs of devices, can prevent an unauthorized user to use the receiver.
However, another use of Bluetooth is to create a temporary computer network. For example, several people in a meeting room can connect their Bluetooth-enabled laptop computers to each other to share files during the meeting.
When I use Bluetooth to create a temporary network, usually is an ad hoc network, ie computers communicate directly with each other instead of going through a wireless access point (WAP). This means they have a point Centralized security control, as it does with a WAP browser (eg a WAP can be configured to use MAC address filtering and other integrated security mechanisms). Therefore, security becomes a major concern because you may be the exposure of sensitive data stored on your laptop to others in the Bluetooth network. Remember that the range of class 1 Bluetooth devices can be over 300 feet – enough so that in some places, the equivalent of BT Wi-Fi "war driver "may be able to establish a link with the team, though not within sight.
Another source of concern is the safety of the title = "Bluetooth> Bluetooth mobile phones. These phones can have the information stored on them, such as addresses and numbers phone contacts, calendar information and other PDA-type data. Hacking into Bluetooth phones using these is called bluesnarfing. Mobile phones more recent software updates for older phones can patch this vulnerability.
A related technique called hacking Bluebugging, and involving access to commands from the phone to the hacker can actually make phone calls, add or delete contact information, or listen the owner of the phone conversations. This vulnerability is also being addressed by the handset manufacturers. Therefore, if you have a capable phone for BT, it is important to maintain the updated software or upgrade to the latest phone models frequently.
Bluetooth devices can also be Victims of Denial of Service (DoS), usually by bombarding the device with applications to the point that makes the battery degrades.
Finally, worms mobile phone "as Cabir that you can use Bluetooth technology to spread to other BT devices. Cabir mobile Objectives using the operating system Symbian smart.
The relatively short range of most Bluetooth devices help to minimize the risk that most of these problems security. For example, to practice or Bluebugging bluesnarfing against a BT phone, the hacker would normally be within 10 meters (one just under 33 feet) from the target phone.
title = "Bluetooth> Bluetooth Headsets
Sony Vaio VGN-AW41XH/Q Initial Set up and boot
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