Martin Passing and Falko Dressler - 2006.

Implement well-know cryptographic algorithm in a hardware sensor node

To check their running time on low-hardware

Algorithm

MD5

SHA-1

AES

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Security solution and architectures.

Implementation

• Hardware

• Software

• Method

Results

Conclusions

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1. Security solution & architecture Primary requirements on a successful security

architecture:

Availability

Authentication

Data confidentiality

Integrity

Non-repudiation

4

1. Security solution & architecture Effects of a security method to sensor nodes:

That of primary requirements (Slide 4).

Life time: some methods consume more energy to operate than others.

Operation time: especially with low-hardware of sensor nodes.

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1. Security solution & architecture Most of proposed security solutions for WSN

Are copied and adapted

From well-know approaches from Internet-based tech.

New idea?

Not yet outlined the feasibility*

6* SPINS: security protocols for sensor networks, ADRIANPERRIG at al., 2002

2. Implementation Hardware

Btnode sensor node

NutOS

Atmega 128L

Chipcon CC1000 low power radio

Bluetooth.

Connect to PC.

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2. Implementation Cryptographic algorithms: MD5 (*) produces a 128-bit hash value

MD5("The quick brown fox jumps over the lazy dog") = 9e107d9d372bb6826bd81d3542a419d6

SHA-1 (*) produces a 160-bit digestSHA1("The quick brown fox jumps over the lazy dog") = 2fd4e1c6 7a2d28fc ed849ee1 bb76e739 1b93eb12

AES (**) is the newest, work with fix data size of 128-bit

Cause De facto standards in current security architectures

There are open sources

8

mp5deep, version 3.5.1 http://md5deep.sourceforge.net/http://csrc.nist.gov/archive/aes/index.html

2. Implementation Main function of test setup

Perform 5 tests:

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1. Hashing/encrypting data arrays – size up to 1kb with MD5/SHA-1/AES

2. Hashing/encrypting data array of 1kb with MD5/SHA-1/AES while ChipconCC1000-Enabled/idle-Enabled/receiving message-Disable.

3. Hashing array of different size with MD5 while Chipcon CC1000 is enabled, idled.

4. Hashing 1kb with MD5 while measuring battery voltage.

5. Hashing 1kb with MD5 while using Bluetooth.

3. Results1. Hashing/encrypting data arrays – size up to 1kb with

MD5/SHA-1/AES

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Fig 1. Hashing arrays of different size with MD5 and SHA-1

Fig 2. Hashing arrays of differentsize with AES

3. Results2. Hashing/encrypting data array of 1kb with MD5/SHA-

1/AES while using Chipcon CC1000.

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Fig 3. Hashing 1024 byte of data with MD5 while using Chipcon radio

Fig 5. Hashing 1024 byte of data with AES while using Chipcon radio

Fig 4. Hashing 1024 byte of data with SHA-1 while using Chipcon radio

3. Results3. Hashing array of different size with MD5 while

Chipcon CC1000 is enabled, idled.

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Fig 7. Hashing array of difference size with MD5 while Chipcon radio is idle

3. Results4. Hashing 1kb with MD5 while measuring battery

voltage.

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Fig 8. Hashing array of difference size with MD5 while measuring the battery voltage

3. Results5. Hashing 1kb with MD5 while using Bluetooth.

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Fig 9. Hashing 1024 byte of data with AES while sending data via the Bluetooth system.

4. Conclusions The paper produced statistical results by measure

implementations.

Analyzed cryptographies consume remarkable execution time (AES on 1kb consume 1.67s). Network operation needs multi-operation total consume time??

Those statistics could be used for our validation when implementation or calibrate a simulation program.

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