biometric security through visual encryption for fog edge ......biometric security through visual...

Biometric Security Through Visual Encryption for Fog Edge Computing

Biometric Security Through Visual Encryption forFog Edge Computing

Ghadir Mostafa 31-0810Hana Hani 31-2206

Lama Ahmed 31-4892Mina Eshak 31-15454Karim Samy 31-15456

German University in Cairo

February 24, 2018

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Outline

1 Motivation

2 Fog Edge Computing

3 Cryptography

4 Watermarking

5 Encryption

6 Decryption

7 Conclusion

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Motivation

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Motivation

Applications:

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Motivation

IoT challenges:

Tons of devices connected to cloud.

Massive processing needed.

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Fog Edge Computing

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Fog Edge Computing

Advantages:

Intermediate layer.

Edge server physically closer.

Work offloaded from cloud.

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Fog Edge Computing

Fog Edge Computing security coin

Side 1: Improved security.

Static data.Closer to where created.Less sharing, less vulnerability.

Side 2: Less secure.

Vulnerable edge devices.Data encryption/ VPN needed.

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Fog Edge Computing

Fog Edge Computing security coin

Side 1: Improved security.

Static data.Closer to where created.Less sharing, less vulnerability.

Side 2: Less secure.

Vulnerable edge devices.Data encryption/ VPN needed.

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Cryptography

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Watermarking

History

In 1300 paper companies used dandy roll process to watermark their products.

roll.jpg

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Watermarking

It is the process of creating a invisible tag for certain data.

1 Copyrights2 Security3 Hiding useful information.

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Watermarking

1 Copyrights

2 Security3 Hiding useful information.

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Watermarking

1 Copyrights2 Security

3 Hiding useful information.

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Watermarking

1 Copyrights2 Security3 Hiding useful information.

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Watermarking

Zero Watermarking

Sometimes data can tolerate obvious changes done to it.

Zero watermarking use watermarks that do not obviouslychange the image.

Watermarks can be used in two different ways

1 Embeded in the image.2 Separated from the image.

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Watermarking

Zero Watermarking

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Watermarking

Zero Watermarking

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Watermarking

Zero Watermarking

1 Embeded in the image.

2 Separated from the image.

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Watermarking

Zero Watermarking

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Watermarking

Zero watermarking Scheme

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Watermarking

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Watermarking

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Watermarking

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Watermarking

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Watermarking

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Watermarking

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Encryption

Gray scale image structure

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Encryption

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Encryption

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Encryption

Converting to gray-scale

Retrieving bit planes

A pixel will be positioned at positions ( j , j , : )Same dimensions as original image

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Encryption

Generating the secret shares

(n) by (n-2) G matrix(n) by (n) identity H matrix(n) by (2n-2) GH concatenated matrixGH’: Complement of GH

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Encryption

Encryption Matrices

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Encryption

Secret key retrieval

y = b +

⌊(a− b) × x s −min(x s)

max(x s) −min(x s)

⌋(1)

b = n + (n − 2)

x s is the sub-sequence containing n+(n-2) values

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Encryption

y = b +

⌊(a− b) × x s −min(x s)

⌋(1)

b = n + (n − 2)

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Encryption

y = b +

⌊(a− b) × x s −min(x s)

⌋(1)

b = n + (n − 2)

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Encryption

y = b +

⌊(a− b) × x s −min(x s)

⌋(1)

b = n + (n − 2)

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Encryption

Encryption process

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Encryption

Encryption process

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Encryption

Encryption process

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Encryption

Encryption process

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Decryption

Decryption Process

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Decryption

Decryption Process

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Decryption

Decryption Process

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Decryption

Decryption Process

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Decryption

Decryption Process

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Decryption

Decryption Process

Needed elements

n secret sharesSecret key

Matrix for each bit

Arrange matrix

Decide 0 or 1

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Decryption

Decryption Process

Needed elements

Matrix for each bit

Arrange matrix

Decide 0 or 1

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Decryption

Decryption Process

Needed elements

Matrix for each bit

Arrange matrix

Decide 0 or 1

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Decryption

Decryption Process

Needed elements

Matrix for each bit

Arrange matrix

Decide 0 or 1

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Decryption

Image Reconstruction

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Decryption

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Decryption

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Decryption

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Decryption

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Decryption

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Decryption

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Decryption

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Decryption

Original, Watermarked, Decrypted Images

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Decryption

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Decryption

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Conclusion

Edge computing and security

Zero watermarking and copyright protection

Encryption and decryption processes

Visual quality of image unchanged

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Conclusion

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Conclusion

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Conclusion

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Conclusion

Any Questions ?!

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biometric security through visual encryption for fog edge ......biometric security through visual...

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