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What is Bluejacking?

Bluejacking is a technique that leverages the Bluetooth communication protocol to send messages to nearby Bluetooth-enabled devices without the user's consent. Contrary to what the name might suggest, it usually involves the benign sharing of messages, such as notes, images, or business cards, rather than any malicious attack or data theft. For someone to be bluejacked, their Bluetooth-enabled device must be discoverable, meaning it is set to be visible to other Bluetooth devices in the vicinity.

The Origin of Bluejacking

The term "Bluejacking" was reportedly coined in the early 2000s when a user named 'Ajack' posted a story about how he had sent a message to someone else's Nokia phone via Bluetooth in a bank. The term is a mash-up of 'Bluetooth' and 'hijacking,' although, as mentioned, it is not generally used for hacking in the criminal sense. It was more of a harmless prank or a novel way to communicate in crowded places, and quickly became a buzzword among tech enthusiasts.

Practical Applications of Bluejacking

Practical applications of Bluejacking are often overlooked because of its reputation as a harmless prank. However, it can be used for marketing and advertising purposes. For instance, retail stores can bluejack a message to consumers' phones that are in the proximity of a Bluetooth hotspot, providing them with discounts or information about products. This kind of proximity marketing can engage customers in a personalized way, taking advantage of the physical proximity to drive immediate action.

Benefits of Bluejacking

Despite its mischievous origins, Bluejacking can offer several benefits, especially in the context of marketing. It's a cost-effective method for businesses to promote their products or services to potential customers who are in the immediate vicinity of their store. Moreover, it can serve as an innovative networking tool at conferences and events, allowing participants to exchange contact information quickly and seamlessly. Bluejacking, when used ethically, has the potential to deliver information directly into the hands of the target audience, making it a unique tool for real-time engagement.


Bluejacking, in itself, is not illegal if it involves sending harmless messages without the intent of fraud or causing harm. However, it must be done with consideration for privacy and consent, and one should always comply with local laws and regulations regarding electronic communication.

While traditional Bluejacking is not meant to be malicious, any form of unsolicited message can be a potential security risk. Users should always be cautious about accepting messages or engaging with content received from unknown sources.

To prevent your device from being bluejacked, you can turn off Bluetooth when not in use or set your device to "non-discoverable" mode. This way, it won't be seen by other Bluetooth-enabled devices looking for targets to send messages to.


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