When the time used by message M exceeds T s, the message M will be considered invalid and nodes can automatically delete the copies of message.
Now node SNa having this key will be able to extract the nonce and can transform this nonce in the reply message; otherwise, it will be considered as a replay attack.
Among examples offered by the project were a phone manufacturer that posted a job announcement with the message: "No Unemployed Candidate Will Be Considered At All," and a Texas electronics company that announced online that it would "not consider/review anyone NOT currently employed regardless of the reason".
On the other hand, lawyers said, some employers and recruiters have posted job openings on the Web with the message that "no unemployed candidates will be considered".
For the last scenario, if the sensor receives the Loc_ack message of an -locator twice and the type bit in the Loc_ack message is set to 0, this -locator will be considered as a -locator, and the distance measurement based on the Loc_ack message with a shorter response time will be considered as correct (such as in Figure 1(a)).
When the sensor is under a duplex wormhole attack, if the sensor receives the Loc_ack message of an -locator for three times and the type bit in the Loc_ack message is set to 1, this -locator will be considered as a -locator (such as in Figure 1(a)).
When the sensor under a simplex wormhole attack as shown in Figure 1(b), if the sensor receives the Loc_ack message of an -locator twice, this -locator will be considered as a -locator.
Thus, the distance measurement based on the Loc_ack message from this -locator which takes the shortest response time will be considered correct.
Commands that have been executed correctly may write any kind of text messages; if the text ends with the word OK, it will be considered a successful submission.
The more similar the routing paths of messages in the same cluster, the less support to each other will be considered.
