Akhil Krovi

1. Implemented a TCP SYN, UDP flood and TCP PSH+ACK attack on a target system
2. Created multiple botnets to launch the respective attacks and bring the entire target system down. 3. Studied defense measures to be undertaken during such kind of DDoS attack.
4. Technologies used: Python, C, Linux

We design a network with 6 nodes and 5 links using TCL scripts.

Part 1: Without any background traffic and by maintain a single TCP connection between nodes, the Efficiency of the TCP congestion control, flow control is observed by

• average throughput
• congestion window
• RTT
• Estimated RTT
• Time out Interval.

Part 2: Resource sharing under the transport layer protocol is observed by generating various flavors of TCP (nodes are altered as source and… Exibir mais

We design a network with 6 nodes and 5 links using TCL scripts.

Part 1: Without any background traffic and by maintain a single TCP connection between nodes, the Efficiency of the TCP congestion control, flow control is observed by

• average throughput
• congestion window
• RTT
• Estimated RTT
• Time out Interval.

Part 2: Resource sharing under the transport layer protocol is observed by generating various flavors of TCP (nodes are altered as source and destinations and a flow is allotted between two nodes using

• TCP+TCP
• TCP+UDP
• TCP tahoe +TCP reno
• TCP westwood + TCP tahoe
and how the behavior of TCP changes according to the background traffic.
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Implementing the message digest algorithm MD5 using java and test how random the output appears. Also, designing of various simplifications of the message digest functions (such as reducing the number of rounds) and see how these change things. A brief about how its done

Message-Digest (Fingerprint) algorithms :

Transform input of arbitrary length into output (so-called "fingerprint" or "message digest") of constant length. These transformation functions must fulfil these… Exibir mais

Implementing the message digest algorithm MD5 using java and test how random the output appears. Also, designing of various simplifications of the message digest functions (such as reducing the number of rounds) and see how these change things. A brief about how its done

Message-Digest (Fingerprint) algorithms :

Transform input of arbitrary length into output (so-called "fingerprint" or "message digest") of constant length. These transformation functions must fulfil these requirements:
• No one should be able to produce two different inputs for which the transformation function returns the same output
• No one should be able to produce input for given pre-specified output

This is how it works:
• Sender creates input message (M) and computes its message digest (sMD). Then he uses his private key and encrypts message digest (esMD).
• Encrypted message digest (esMD) is attached to the input message (M) and the whole message (M-esMD) is sent to receiver.
• Receiver gets the message (M-esMD) and extracts the encrypted message digest (esMD).
• Then he computes his own message digest (rMD) of the received message (M).
• He also decodes received message digest (esMD) with sender's public key and gets decoded message digest (desMD).
• Then he compares both message digests (rMD ?= desMD).
• When both message digests are equal, the message was not modified during the data transmission.

MD5 algorithm implementation description

MD5 algorithm takes input message of arbitrary length and generates 128-bit long output hash. MD5 hash algorithm consist of 5 steps

Step 1. Append Padding Bits
Step 2. Append Length
Step 3. Initialize MD Buffer
Step 4. Process Message in 16-Word Blocks
Step 5. Output

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This project is implementing RSA algorithm. A little background check on what RSA is

a) RSA is an algorithm used to encrypt and decrypt messages. It is an asymmetric cryptographic algorithm.
b) Asymmetric means that there are two different keys.
c) This is also called public key cryptography, because one of them can be given to everyone. The other key must be kept private.
d) RSA stands for Ron Rivest, Adi Shamir and Leonard Adleman
e) RSA involves a public key and… Exibir mais

This project is implementing RSA algorithm. A little background check on what RSA is

a) RSA is an algorithm used to encrypt and decrypt messages. It is an asymmetric cryptographic algorithm.
b) Asymmetric means that there are two different keys.
c) This is also called public key cryptography, because one of them can be given to everyone. The other key must be kept private.
d) RSA stands for Ron Rivest, Adi Shamir and Leonard Adleman
e) RSA involves a public key and private key. The public key can be known to everyone; it is used to encrypt messages. Messages encrypted using the public key can only be decrypted with the private key.

The project implementation is done using java and is divided into two parts.

Part 1: Generating large prime Numbers
Part 2: RSA implementation where three programs: keygen (public key, private key pair), encrypt (n,e) and decrypt (n,d)
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My role is to implement 6LoWPAN using contiki. The main idea is low-power devices with limited processing capabilities should be able to participate in the IOT. 6LoWPAN is IPv6 with header compression which reduces power inturn for transmission. We know that, the ZigBee is the most popular low-cost, low-power wireless mesh networking standard available today but considering the Wireless Protocol Interoperability, for instance

• Bridging between ZigBee and non-ZigBee networks requires a… Exibir mais

My role is to implement 6LoWPAN using contiki. The main idea is low-power devices with limited processing capabilities should be able to participate in the IOT. 6LoWPAN is IPv6 with header compression which reduces power inturn for transmission. We know that, the ZigBee is the most popular low-cost, low-power wireless mesh networking standard available today but considering the Wireless Protocol Interoperability, for instance

• Bridging between ZigBee and non-ZigBee networks requires a more complex application layer gateway.
• 6LoWPAN offers interoperability with other wireless 802.15.4 devices as well as with devices on any other IP network link (e.g., Ethernet or Wi-Fi) with a simple bridge device.

We use Contiki which is an open source operating system for the Internet of Things. Contiki connects tiny low-cost, low-power microcontrollers to the Internet. Contiki is a powerful toolbox for building complex wireless systems. Exibir menos

The reasearch is all about Artificial Neural Networks (ANN) which is a Biological approach to Artificial Intelligence. It is one kind of an information model that is based on biological nervous systems, such as the brain that helps in process information. It is a kind of motivation for computing, based on the interaction of multiple connected processing elements. It comprises of a vast amount of highly interconnected processing elements like neurons in the brain which work in unison to solve… Exibir mais

The reasearch is all about Artificial Neural Networks (ANN) which is a Biological approach to Artificial Intelligence. It is one kind of an information model that is based on biological nervous systems, such as the brain that helps in process information. It is a kind of motivation for computing, based on the interaction of multiple connected processing elements. It comprises of a vast amount of highly interconnected processing elements like neurons in the brain which work in unison to solve specific problems. A powerful tool to solve many real world problems. An ANN is for a particular application, such as pattern recognition or data classification. Exibir menos

The role of fiber optics in wide area networks to provide enhanced communications and networking capabilities is discussed. The role of network topologies and various networking cables are discussed. Also, focus is given on the latest technologies in the Fiber optics and in WAN. covered the role of protocols PPP, ATM and their importance in designing a WAN network. Insight of how to select WAN switches, routers and WAN service provider. It also discusses the emerging SD-WAN and its difference… Exibir mais

The role of fiber optics in wide area networks to provide enhanced communications and networking capabilities is discussed. The role of network topologies and various networking cables are discussed. Also, focus is given on the latest technologies in the Fiber optics and in WAN. covered the role of protocols PPP, ATM and their importance in designing a WAN network. Insight of how to select WAN switches, routers and WAN service provider. It also discusses the emerging SD-WAN and its difference from the tradition WAN. Exibir menos

The project focuses on applying reliability forensics in analyzing the stability of complex systems. In this project every complex system is considered as a structure consisting of blocks of smaller individual components. The reliability is estimated by computing the probability of failure of individual components of a complex system and then using this individual probability terms to derive a reliability polynomial . This reliability polynomial can then be used to compute the figure of merit… Exibir mais

The project focuses on applying reliability forensics in analyzing the stability of complex systems. In this project every complex system is considered as a structure consisting of blocks of smaller individual components. The reliability is estimated by computing the probability of failure of individual components of a complex system and then using this individual probability terms to derive a reliability polynomial . This reliability polynomial can then be used to compute the figure of merit of the system . This project was done under the guidance of Professor . Bruce Briley PhD, Illinois Institute of Technology during the course " Fiber Optic Communication Systems ". Exibir menos

1. Socket based sniffer in python to analyze traffic
2. Captured and analyzed TCP, UDP and ICMP packets flowing through the network.

1. Configured RIP and OSPF which consists of hosts, switches and Cisco 3640 routers
2. Ensured Connection using PING and studied packets in Wireshark

A promising solution is to break orthogonality.
1. It has been recognized as a paradigm shift for the design of MA techniques in future wireless networks
2. The key idea of NOMA is to encourage spectrum sharing using power domain of multiple access.

NOMA can be integrated in existing and future wireless systems owing to its full compatibility with other communication systems.

The main aim of the project is to reduce the BER(bit error rate) in the transmission of data and can be implemented in any wireless techniques to control the burst errors and provide end users a non interrupted service. Firstly, we incorporated on WiMAX technology which could be later modified to all wireless technologies. The SNR improvement is observed when this methodology is applied to several modulation techniques such as BPSK, QPSK, 16 QAM, 64 QAM. All simulations are done in matlab.

By a single touch on the Capacitive touch shield we had a playlist running in the cloud. Technologies used are zigbee, spark core and arduino. The Capacitive touch shield is connected to a arduino shield followed by a transmitter zigbee. The receiver zigbee is then connected to a sparkcore which is connected to cloud(playlist which is written in html).