Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
public:papers:wistp2015 [2015-09-03 07:58] petrspublic:papers:wistp2015 [2016-12-01 13:28] (current) – external edit 127.0.0.1
Line 6: Line 6:
  
   * Conference page: [[http://wistp2015.wistp.org/|WISTP 2015]]   * Conference page: [[http://wistp2015.wistp.org/|WISTP 2015]]
-  * Download paper: {{:public:papers:secamplif_wistp15.pdf|pdf}}+  * Download author pre-print of the paper: {{:public:papers:secamplif_wistp15.pdf|pdf}}
   * Download extended version of paper: {{:public:papers:secamplif_tr15_final.pdf|FIMU-RS-2015-01}} (technical report, FI MUNI)   * Download extended version of paper: {{:public:papers:secamplif_tr15_final.pdf|FIMU-RS-2015-01}} (technical report, FI MUNI)
   * Download presentation: {{:public:papers:secamplif_wistp15_svenda_slides.pdf|pdf}}   * Download presentation: {{:public:papers:secamplif_wistp15_svenda_slides.pdf|pdf}}
Line 13: Line 13:
 **Bibtex:** **Bibtex:**
    @inproceedings{secrecyamplif_wistp2015,    @inproceedings{secrecyamplif_wistp2015,
-     author = {Radim O\v{s}\v{t}\'{a}dal and Petr \v{S}venda and V{\'a}clav Maty{\'a}\v{s}},+     author = {Radim O\v{s}\v{t}\'{a}dal \Petr \v{S}venda \and V{\'a}clav Maty{\'a}\v{s}},
      title = {On Secrecy Amplification Protocols},      title = {On Secrecy Amplification Protocols},
      booktitle = {The 9th WISTP International Conference on Information Security Theory and Practice (WISTP’2015),      booktitle = {The 9th WISTP International Conference on Information Security Theory and Practice (WISTP’2015),
Line 24: Line 24:
      
      
 +
 +----
 +----
  
  
  
 ===== What is this paper about? ===== ===== What is this paper about? =====
 +
 +The secrecy amplification protocol provides description how messages with a fresh key material should be propagated inside a target network to provide secure link key to nodes with key currently compromised by an attacker. As wireless networks running on batteries are targeted, not only protocol's success rate (number of newly secured links), but also message overhead (significantly impacting energy consumption) must be considered. 
 +
 +//A secrecy amplification protocol can be pretty effective: a network with 50-70 % of compromised links can be turned into network with 95+ % secure links for the price of small hundreds of messages (per node) in only tens of seconds.//
  
 **In this we paper, we:** **In this we paper, we:**
-  * gave motivation, why secrecy amplification protocols should be used -- if enough neighbours are available in network and random compromise pattern is assumed, network with only 30 % secure can be turned into network with more then 95 % secure links.  +  * Gave motivation, why secrecy amplification protocols should be used -- if enough neighbours are available in network and random compromise pattern is assumed, network with only 30 % secure can be turned into network with more then 95 % secure links.  
-  * provided survey of all published secrecy amplification protocols (13 in total) +  * Provided survey of all published secrecy amplification protocols (13 in total)
-  * compared protocols wrt message efficiency, number of links they are able to secure and other characteristics +  * Established upper bound of secrecy amplification protocol success rate for given network. 
-  * discussed how hard is to execute secrecy amplification protocol in practice on real node (TelosB, TinyOS) +  * Compared protocols wrt message efficiency, number of links they are able to secure and other characteristics. 
-  * introduced new class of hybrid secrecy amplification protocols, which are easier to synchronize and provide very good tradeoff between number of secure links (higher the better) and messages transmitted (lower the better)+  * Discussed how hard is to execute secrecy amplification protocol in practice on real node (TelosB, TinyOS). 
 +  * Introduced new class of hybrid secrecy amplification protocols, which are easier to synchronize and provide very good tradeoff between number of secure links (higher the better) and messages transmitted (lower the better).
  
 {{:public:papers:secure_links_random.png|}} {{:public:papers:secure_links_random.png|}}
  
-Increase in the number of secured links after SA protocols in the random+//Figure showing increase in the number of secured links after secrecy amplification protocols in the random
 compromise pattern on network with 20.3 legal neighbours on average. With in- compromise pattern on network with 20.3 legal neighbours on average. With in-
 creasing number of neighbouring nodes the general effectiveness of protocol grows. creasing number of neighbouring nodes the general effectiveness of protocol grows.
 As can be seen, a strong majority of secure links (> 90%) can be obtained even As can be seen, a strong majority of secure links (> 90%) can be obtained even
-when the initial network had 70% of compromised links.+when the initial network had 70% of compromised links.//
  
 {{:public:papers:sa_normalized_messages.png|}} {{:public:papers:sa_normalized_messages.png|}}
  
-Increase in the number of secured links divided by the number of exchanged messages during the protocol execution (random compromise pattern, 20.3 legal neighbours on average). Node-oriented protocols send significantly more messages with rising network density. This stands especially for 4-party node-oriented protocols, which are the least effective. The best tradeoff shows group-oriented and hybrid protocols. +//Figure showing increase in the number of secured links per message used during the protocol execution (random compromise pattern, 20.3 legal neighbours on average). The higher value is better - more links are secured per single message. Node-oriented protocols send significantly more messages with rising network density making them less effective per single message. This stands especially for 4-party node-oriented protocols, which are the least effective. The best tradeoff shows group-oriented and hybrid protocols.//