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Project 2.A Extending NS-2 to support encryption/decryption

Project 2.A Extending NS-2 to support encryption/decryption. Date: 04/07/2005 Course: CSCI 5931 Name: Sam Tran Tuan Nguyen. Extending NS-2 to support encryption/decryption. Abstract Approach How to add new security features in NS-2 General design encryption/decryption in NS-2

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Project 2.A Extending NS-2 to support encryption/decryption

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  1. Project 2.AExtending NS-2 to support encryption/decryption Date: 04/07/2005 Course: CSCI 5931 Name: Sam Tran Tuan Nguyen

  2. Extending NS-2 to support encryption/decryption • Abstract • Approach • How to add new security features in NS-2 • General design encryption/decryption in NS-2 • Implementation • Simple demonstration • Conclusion • References

  3. 1. Abstract Implementation of security on NS-2 is necessary in network simulation. However, currently, NS-2 does not support these features. Our project will aim to solve this issue.

  4. 2. Approach • NS-2 is open source network simulation application. • NS-2 currently supports IP protocol suite and various standard routing protocols for wire and wireless network. • To add security functions. We have to modify/build new packet formats.

  5. 3. Add new security features in NS-2 • Define a new packet format. • Derive new class from Agent class for processing this new packet format. • Processing includes: • Encrypting function. • Decrypting function. • Message digest generation function. • E.t.c

  6. 4. General design flow for security packet in NS-2 Figure1: Steps to add new packet to NS-2 and testing results

  7. 5. Implementation Figure 2: Logical design of the encryption/decryption system

  8. 5. Implementation (cont.) • Hash function • Polynomial Algorithm. • Encryption function • Input: String of plain text • Algorithm: CESAR cipher with pre-shared key of 3 • Output: Encrypted text. • Decryption function • Input: string of encrypted text • Algorithm: CESAR cipher with pre-shared key of 3 • Output: decrypted text.

  9. 6. Simple demonstration Figure 3: Outcome of simple demonstration script.

  10. 7. Conclusion • The project shows a method to add security functions into NS-2. • With this approach, we can build standard security components into NS-2 using industrial standard algorithm such as SHA-1, MD5 for hash function and DES,3DES and AES for encryption/decryption. • Project can be extended to support asymmetric key encryption/decryption.

  11. 8. References • Marc Greis (2005). Tutorial for the network simulator ns. Retrieved 3/28/05 from: http://www.isi.edu/nsnam/ns/tutorial/index.html • Free Information Society (2005). Hash Table Class. Retrieved 4/4/05 from: http://www.freeinfosociety.com/computers/programs/cpp/hashtable.h • Jess Garms, Daniel Somerfield (2001). Professional Java Security. ISBN 1-861004-25-7 • Hash function implemented in C++ with polynomial algorithm. Retrieved 4/14/05 from http://wikisource.org/wiki/Polynomial_hash_function

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