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Peer-to-Peer Secure Update for Heterogeneous Edge Devices E. Band, H. Herry, C. Perkins, J. Singer School of Computing Science University of Glasgow HeLP-DC, HiPEAC 2018 – University of Glasgow 1

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Page 1: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

Peer-to-PeerSecureUpdateforHeterogeneousEdgeDevices

E.Band,H.Herry,C.Perkins,J.SingerSchoolofComputingScience

UniversityofGlasgow

HeLP-DC,HiPEAC2018– UniversityofGlasgow 1

Page 2: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

FRµIT:FederatedRaspberryPi µ-InfrastructureTestbed(www.fruit-testbed.org)• “Massiveaggregationoflow-cost,low-power,commodityinfrastructurecanformanefficientandeffectivecomputefabricforkeydistributedapplications”

• Applications:edge-compute,IoT,portabledata-center,expendable-compute

• FundedbyUK-EPSRC

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Traditional:fewbigdata-centersvs

FRµIT:manymicrodata-centers

2

Page 3: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

Problem:UpdatingRemoteSystem

• Updatesystemiscritical• Securitypatch• Deployfirmware,software,configurations

• Regularupdate• Limited(orno)physicalaccess

• Remotelocations• Mobile• Privateresidentiallocations

• Existingtools• RequiresdirectSSHaccess• Needswell-connectedserver

HeLP-DC,HiPEAC2018– UniversityofGlasgow 3

Page 4: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

Problem:UpdatingRemoteSystem

• HeterogeneousNetwork• SomenodesarebehindNATs(e.g.residential)orFirewalls(e.g.university)

• Single-pointoffailure• Scalability

• DenialofServiceattackonupdateserver• Linuxdistributions:dedicatedmirrorservers• Randomizeddownloadslot-times[Pollocket.al.]

HeLP-DC,HiPEAC2018– UniversityofGlasgow 4

Page 5: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

OurApproach

• DecentralizedmanagementframeworkusingPeer-to-Peeroverlaynetwork• Agossipprotocoltodistributesecuredupdatenotifications(torrent-file)

• STUN-basedUDPholepunchingtodiscoverandopenNATbindings(NAT-TM)

• BitTorrent tosecurelydistributeupdates(software,managementscripts,etc)

• Contribution:oursystemassumespartialnetworkconnectivity,andworksinthepresenceofNATsorfirewalls

HeLP-DC,HiPEAC2018– UniversityofGlasgow 5

Page 6: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

OurApproach

• Otheradvantages• Bandwidthsharing• Updatescanreachindirectlyconnectednodes• Resilienttosinglepointoffailureandattacks• Wemaynotneedadedicatedupdateserver

HeLP-DC,HiPEAC2018– UniversityofGlasgow 6

Page 7: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

Architecture

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Agent

NAT-TMBTClient(Trans-mission)

OS

P2PUpdateSystem

Puppet Chef

Deployer

Shell

7

NAT

STUNServer

Page 8: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

Torrent-file++

HeLP-DC,HiPEAC2018– UniversityofGlasgow

• Tracker/Nodes• File-name• File-length• Piece-length• Cryptographic-hashesoffilepieces• Targetresourceidentifier• Version• Digitalsignature

Torren

t-file

(Stand

ard)

Torren

t-file++

• Targetresourceidentifier• Distinguishdifferenttargetresources

• Version(monotonicallyincreasing)• Helpagenttoignoreoutdatedupdateexistinginthenetwork

• DigitalSignature• Adminholdsaprivate-key• Eachnodehasapublic-key• Signature=encrypt(sha512(torrent-file),private-key)

• sha512(torrent-file)=?decrypt(signature,public-key)

8

Page 9: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node2

Torrent-file++Update-fileNodeUpdated-Node

Walkthrough

9

IP1:Port1

Page 10: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node2

Torrent-file++Update-fileNodeUpdated-Node

10

IP1:Port1

Walkthrough

Page 11: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node2

Torrent-file++Update-fileNodeUpdated-Node

11

IP1:Port1

IP2:Port2Walkthrough

Page 12: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node2

Torrent-file++Update-fileNodeUpdated-Node

12

IP1:Port1

IP2:Port2Walkthrough

Page 13: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node2

Torrent-file++Update-fileNodeUpdated-Node

13

IP1:Port1

IP2:Port2Walkthrough

Page 14: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node2

Torrent-file++Update-fileNodeUpdated-Node

14

IP1:Port1

IP2:Port2Walkthrough

Page 15: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node3

Torrent-file++Update-fileNodeUpdated-Node

NAT

STUNServer

15

Node4 Node5

NAT

IP4:Port4

Walkthrough

Page 16: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node3

Torrent-file++Update-fileNodeUpdated-Node

NAT(EIP3:EPort3)

STUNServer

16

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

Node4 Node5

NAT(EIP4:EPort4)

IP4:Port4

Walkthrough

Page 17: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node3

Torrent-file++Update-fileNodeUpdated-Node

STUNServer

17

NAT(EIP3:EPort3)

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

Node4 Node5

NAT(EIP4:EPort4)

IP4:Port4 IP1:Port1EIP4:EPort4,IP4:Port4

IP1:Port1EIP3:EPort3,IP3:Port3

Walkthrough

Page 18: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node3

Torrent-file++Update-fileNodeUpdated-Node

STUNServer

18

NAT(EIP3:EPort3)

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

Node4 Node5

NAT(EIP4:EPort4)

IP4:Port4 IP1:Port1EIP4:EPort4,IP4:Port4

IP1:Port1EIP3:EPort3,IP3:Port3IP5:Port5

Walkthrough

Page 19: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node3

Torrent-file++Update-fileNodeUpdated-Node

STUNServer

19

NAT(EIP3:EPort3)

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

Node4 Node5

NAT(EIP4:EPort4)

IP4:Port4 IP1:Port1EIP4:EPort4,IP4:Port4

IP1:Port1EIP3:EPort3,IP3:Port3IP5:Port5

Walkthrough

Page 20: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node3

Torrent-file++Update-fileNodeUpdated-Node

STUNServer

20

NAT(EIP3:EPort3)

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

Node4 Node5

NAT(EIP4:EPort4)

IP4:Port4 IP1:Port1EIP4:EPort4,IP4:Port4

IP1:Port1EIP3:EPort3,IP3:Port3IP5:Port5

Walkthrough

Page 21: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node3

Torrent-file++Update-fileNodeUpdated-Node

STUNServer

21

NAT(EIP3:EPort3)

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

Node4 Node5

NAT(EIP4:EPort4)

IP4:Port4 IP1:Port1EIP4:EPort4,IP4:Port4

IP1:Port1EIP3:EPort3,IP3:Port3IP5:Port5

Walkthrough

Page 22: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node3

Torrent-file++Update-fileNodeUpdated-Node

STUNServer

22

NAT(EIP3:EPort3)

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

EIP3:EPort3,IP3:Port3EIP4:EPort4,IP4:Port4

Node4 Node5

NAT(EIP4:EPort4)

IP4:Port4 IP1:Port1EIP4:EPort4,IP4:Port4

IP1:Port1EIP3:EPort3,IP3:Port3IP5:Port5

Walkthrough

Page 23: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node6

STUNServer

Torrent-file++Update-fileNodeUpdated-Node

Firewall

23

Walkthrough

Page 24: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node6

STUNServer

Torrent-file++Update-fileNodeUpdated-Node

Firewall(EIP6:EPort6)(Adminmodifiestherules)

24

Walkthrough

Page 25: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node6

STUNServer

Torrent-file++Update-fileNodeUpdated-Node

25

EIP6:EPort6,IP6:Port6

Firewall(EIP6:EPort6)(Adminmodifiestherules)

Walkthrough

Page 26: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node6

STUNServer

Torrent-file++Update-fileNodeUpdated-Node

26

EIP6:EPort6,IP6:Port6

EIP6:EPort6,IP6:Port6

Firewall(EIP6:EPort6)(Adminmodifiestherules)

Walkthrough

Page 27: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node6

STUNServer

Torrent-file++Update-fileNodeUpdated-Node

27

EIP6:EPort6,IP6:Port6

EIP6:EPort6,IP6:Port6

IP1:Port1

Firewall(EIP6:EPort6)(Adminmodifiestherules)

Walkthrough

Page 28: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node6

STUNServer

Torrent-file++Update-fileNodeUpdated-Node

28

EIP6:EPort6,IP6:Port6

EIP6:EPort6,IP6:Port6

IP1:Port1

Firewall(EIP6:EPort6)(Adminmodifiestherules)

Walkthrough

Page 29: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node6

STUNServer

Torrent-file++Update-fileNodeUpdated-Node

29

EIP6:EPort6,IP6:Port6

EIP6:EPort6,IP6:Port6

IP1:Port1

Firewall(EIP6:EPort6)(Adminmodifiestherules)

Walkthrough

Page 30: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow

Node1

Node6

STUNServer

Torrent-file++Update-fileNodeUpdated-Node

30

EIP6:EPort6,IP6:Port6

EIP6:EPort6,IP6:Port6

IP1:Port1

Firewall(EIP6:EPort6)(Adminmodifiestherules)

Walkthrough

Page 31: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

PreliminaryExperiment

• 6 Raspberry-Pis 2/3• Residentialnetworks(HomeNAT)– Sky,BT• FirewallNetwork– SchoolofComputingScience(UniversityofGlasgow)• STUNServeronGoogleComputeEngineVM• Update:webserverwithstaticfiles

• Puppetmanifest,puppet-modules,softwarepackages,htmlfiles

• Result:successfulupdatesonall-nodes,includingbehindhomeNATsandfirewall

HeLP-DC,HiPEAC2018– UniversityofGlasgow 31

Page 32: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

Shortcomings

• NotworkwithallNATtypese.g.SymmetricNAT

HeLP-DC,HiPEAC2018– UniversityofGlasgow 32

Page 33: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

Conclusion&FutureWork

• Our(prototype)frameworkcanupdatesecurelythesystemwithpartialnetworkconnectivity,andworksinthepresenceofNATsorfirewalls• IntegratethisP2PsecureupdateframeworkintoFRµITTestbed• Large-scaleexperimentsonFRµITTestbed

HeLP-DC,HiPEAC2018– UniversityofGlasgow 33

Page 34: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

https://picycle.org

DoyouhaveanunusedRaspberryPiboardlockedawayinacupboard?Pleasedonateitforscientificresearch.

HeLP-DC,HiPEAC2018– UniversityofGlasgow 34

Page 35: Peer-to-Peer Secure Update for Heterogeneous Edge Devices€¦ · HeLP-DC, HiPEAC 2018 –University of Glasgow 31. Shortcomings •Not work with all NAT types e.g. Symmetric NAT

Thankyou!

HeLP-DC,HiPEAC2018– UniversityofGlasgow 35


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