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Having the same set of LSAs is simply an algorithmic requirement for routing convergence. What specific security threat do you see this prevents?<br class="">
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Lan</div>
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<div class="">On Jul 19, 2016, at 10:54 AM, Tanusree Chatterjee <<a href="mailto:tnsr.chatterjee@gmail.com" class="">tnsr.chatterjee@gmail.com</a>> wrote:</div>
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<p dir="ltr" class="">Thanks for the response. By security, I also meant the digest tree maintained by all the nodes (last version of NLSR) in the entire network must be same as they exchange the root digest while sending interest periodically to each other.
So, to do the same each node in the entire network must have the common LSDB.<br class="">
As a simple scenario of 5 nodes I was running in mini ndn emulator, the nlsrc status of all nodes show the same LSDB, which consists of all the LSAs of each node in the network.</p>
<div class="gmail_quote">On Jul 19, 2016 7:09 PM, "Lan Wang (lanwang)" <<a href="mailto:lanwang@memphis.edu" class="">lanwang@memphis.edu</a>> wrote:<br type="attribution" class="">
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<div style="word-wrap:break-word" class="">Tanusree,
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<div class="">Every node in NLSR maintains an LSDB (i.e. the topology of the entire network) since NLSR is a link-state routing protocol. If the network has converged, all the LSDBs should be the same. Every LSA is signed by its originator and can be verified
using a trust model to make sure that the LSA is indeed originated by that origin router. This is a security benefit provided by NDN’s data-centric security model. Is this what you mean by “this synchronization of same LSDB in the entire network helps in
security"? </div>
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Lan</div>
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<div class="">On Jul 18, 2016, at 9:25 AM, Tanusree Chatterjee <<a href="mailto:tnsr.chatterjee@gmail.com" target="_blank" class="">tnsr.chatterjee@gmail.com</a>> wrote:</div>
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<p dir="ltr" class="">Hi all,<br class="">
One thing I could not be sure about that whether all the nodes in the network have the common LSDB? If so, all the nodes have the idea of topology of the entire network? If NLSR is concerned, so this synchronization of same LSDB in the entire network helps
in security also?</p>
<p dir="ltr" class="">Regards,<br class="">
Tanusree Chatterjee</p>
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