1. Sharing Technologies for Cloud Computing
Wen-Pinn Fang
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2. Outline Sharing technologies Cloud computing QRCode Visual Sharing
Examples
Discussion
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3. Sharing technologies
Sharing is a method to dispatch information safety
It has Fault-tolerance property
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4. Sharing technologies
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5. Sharing technologies
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6. Sharing technologies
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7. Sharing technologies
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8. Sharing technologies Secret image Sharing Visual sharing
Polynomial type
Visual sharing
Visual cryptography
Random grid
Probability method
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9. Secret image sharing polynomial type
(3,4)
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10. Secret image sharing 22 18 22 18 66 f(x)=a0+a1x+a2x2 22+22x3+18x32
154
f(x)=a0+a1x+a2x2
22+22x3+18x32
22+22x2+18x22
22+22x1+18x12
250
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11. Secret image sharing 22 18 22 18 66 66=a0+a1+a2 154=a0+a12+a222
250
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12. Secret Image Sharing The security has been proven by Thien and Lin
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13. Visual Sharing
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14. Visual Sharing
User can see the secret by just stack shares
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15. Visual Sharing
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16. Visual Sharing A pixel in secret image Corresponding block in Share 1
Resulting block
from stacking
the two shares
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17. Visual Sharing transparency1 transparency2 (2B2W) White block
black block
(4B)
(2B2W)
The result of stacking
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18. Visual Sharing Extension: Gray level image Color image
Progressing recovery
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19. Visual Sharing
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20. Visual Sharing
Fast decoding (O(1))
Low resolution
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21. Cloud computing
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22. Cloud computing
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23. Cloud computing
Cloud computing is the delivery of computing as a service rather than a product, whereby shared resources, software, and information are provided to computers and other devices as a utility (like the electricity grid) over a network (typically the Internet).
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24. Cloud computing SaaS : Software as a Service
PaaS: Platform as a Service
IaaS: Infrastructure as a Service
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25. Cloud computing
New Generation Computing, 28(2010)
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26. Cloud computing
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27. Cloud computing What Who On-demand access to any application End-user
(does not care about hw or sw)
Platform for building
and delivering web
applications
Developer
(no managing of the underlying hw & sw layers)
Delivery of a raw
computer
infrastructure
System Administrator
(complete management of the
computer infrastructure)
Software as a Service
Platform as a Service
Infrastructure as a
Service
Physical Infrastructure
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28. QRCode
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29. QRCode
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30. QRCode
A QR code (Quick Response code) is a type of matrix barcode first designed for the automotive industry.
fast readability and comparatively large storage capacity.
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31. QRCode Version 1, 21×21, 10-25 alphanumeric chars Version 2, 25×25,
Version 10, 57x57,
alphanumeric chars
Version 40, 177x177,
1,852-4,296 alphanumeric chars
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32. QRCode
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33. QRCode
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34. QRCode
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35. Example
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36. Examples Distribute image database Offline verification for QRCode
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37. Examples- Distribute image database
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38. Example Based on secret image sharing, it is possible to realize.
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39. Example -Offline verification for QRCode
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40. Example-1
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41. Example- Propose method
Encoding phase
Input: QR Code Image I which size is W×H
Output: 2 transparencies T1 and T2
M(6,2,2)={(0,0,1,1),(1,1,0,0),(1,0,1,0),(0,1,0,1),(1,0,0,1),(0,1,1,0)}
For x=1 To W
For y=1 to H
If Finder Pattern or alignment pattern then
I(x,y)=Skip
End if
End for
For x=1 To W/2
For y=1 to H/2
index=random select a integer from 1 to 6
If I(x,y)=black then
For i=1 to 2
For j=1 to 2
T1(x+i,y+j)=M(index,i,j)
T2(x+i,y+j)=M(index/2×2+index mod 2,i,j)
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42. Example -Propose method
Else For i=1 to 2 For j=1 to 2 T1(x+i,y+j)=M(index,i,j) T2(x+i,y+j)=M(index,i,j) End for End if End For Draw Finder pattern and alignment pattern
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43. Example
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44. Example
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45. Example
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46. Example
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47. Discussion
It is very important to keep security in cloud computing application.
It is possible to use cloud computing service by QRCode.
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48. Thank you
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