Monday, April 16, 2018

Network Breaches Case Study

Network Breaches Case Study: JP Morgan 


Date: July 2014
Impact: 76 million households and 7 million small businesses
Details: The largest bank in the nation was the victim of a hack during the summer of 2014 that compromised the data of more than half of all US households – 76 million – plus 7 million small businesses. The data included contact information – names, addresses, phone numbers and email addresses – as well as internal information about the users, according to a filing with the securities and exchange commision.
The bank said no customer money had been stolen and that there was “no evidence that account information for such affected customers – account numbers, passwords, user IDs, dates of birth or Social Security numbers – was compromised during this attack."
Still, the hackers were reportedly able to gain “root" privileges on more than 90 of the bank’s servers, which meant they could take actions including transferring funds and closing accounts. According to the SANS Institute, JP Morgan spends $250 million on security every year. 
In November 2015, federal authorities indicted four men, charging them with the JP Morgan hack plus other financial institutions. Gery Shalon, Joshua Samuel Aaron and Ziv Orenstein faced 23 counts, including unauthorized access of computers, identity theft, securities and wire fraud and money laundering that netted them an estimated $100 million. A fourth hacker who helped them breach the networks was not identified.
Shalon and Orenstein, both Israelis, pleaded not guilty in June 2016. Aaron was arrested at JFK Airport in New York last December.
Solutions:

Accountability:

The GDPR places accountability obligations on data controllers to demonstrate compliance. These include accountability measures such as: Privacy Impact Assessments, audits, policy reviews, activity records and (potentially) appointing a data protection officer (“DPO”).
Privacy by Design:
With regard to Privacy by Design, the enterprise will need to ensure implementation of technical and organizational measures to show that they have integrated data compliance measures into their data processing activities, such as adopting policies that ensure compliance with data minimization obligations. This is one main reason that Data Protection Officers must have expertise in technical and administrative data protection controls.

Monday, April 24, 2017

Basic operations on DSP processor

Basic operation on DSP Processor

     All previous labs performed by us were either mathematical calculation and its execution using c language on compiler or simulation using SCILAB. But to know what is real time, perform of our system and what is its response for given inputwe need to test a real time system. For that we go for Emulation of the system. 
   All previous labs performed by us were either mathematical calculation and its execution using c language on compiler or simulation using SCILAB. But to know what is real time, perform of our system and what is its response for given inputwe need to test a real time system. For that we go for Emulation of the system. 

DSP application on one dimentional signal

Patent review: DIGITAL SIGNAL PROCESSOR ENHANCED PULSE WIDTH MODULATION                             AMPLIFIER

Application no.10/106,544

Patent no.US,6,683,494,B2

Date of patent:Jan27,2014

Summary:
A pulse width modulator(PWM) audio power amplifier with a switch mode power convertor is provided that may adjust the duty cycle of the switch mode power converter based on output current.The PWM audio power amplifier may include digital signal processor to process input signal and control switch mode power converter to minimize distortion in amplified input signal.The control within PWM audio power amplifier may include digital feed for ward open loop control or may combine digital feed forward digital open loop with analog negative feedback closed loop control
to minimize distortion in output signal.
Link:http:https://patents.google.com/patent/US6683494B2/en


IEEE Paper review: DSP BASED IMPLEMENTATION OF A DIGITALLY-CONTROLLED                                              SINGLE PHASE PWM INVERTER FOR UPS
Authors: H.J. JIANG, Y. QIN , S. S DU,Z.Y. YU, S. CHOUDHURY
Publisher: IEEE


Summary:
This paper presents a new method to realize a digitally-controlled Pulse Width Modulation (PWM) inverter used in an on-line Uninterruptible Power Supply (UPS). This digitally-controlled PWM inverter has been implemented using a Digital Signal Processor (DSP). This implementation includes PWM pulse generation, voltage feedback loop (outer loop) and average current feedback loop (inner loop). Simulation and experimental results are given to verify the DSP based PWM inverter design and implementation.
Link:http://ieeexplore.ieee.org/document/793502/

     

Sunday, April 23, 2017

FIR filter using FSM

FIR filter design using frequency sampling method

The aim of the experiment was to design digital filter using frequency sampling method. The magnitude and phase spectrum were plotted for LPF and HPF. 
It was observed that the phase plot is similar. Also, if the order of LPF and HPF are same, then the phase plot for both the filters is also same. The observed and calculated values of As and Ap were verified.

Link for code:https://drive.google.com/drive/folders/0B076kcYDr0DCbzZndW5SMGdjMmM

FIR filter using windowing method

FIR filter design using windowing method

The aim of the experiment was to design digital filter using windowing method and study the spectrum. The input parameters were passband attenuation(Ap), stopband attenuation(As), passband frequency(Fp), stopband frequency(Fs) and sampling frequency(F). The magnitude and phase spectrum for LPF and BPF using Hanning window were plotted. 
The observed and calculated values of Ap and As were compared. Thus, the values were verified. The phase spectrum was observed to be linear.

Link for code:https://drive.google.com/drive/folders/0B076kcYDr0DCbzZndW5SMGdjMmM

Butterworth filter

Butterworth filter

This experiment was also performed using Scilab. The input parameters were passband attenuation(Ap), stopband attenuation(As), passband frequency(Fp), stopband frequency(Fs) and sampling frequency(F).The theoretical and observed values of Ap and As were compared.
It was observed that all the poles lie in the unit circle for high pass and low pass digital filter. Thus, the filters are stable. Greater the order of filter, greater is the accuracy in the theoretical and observed values. 

Link for code:https://drive.google.com/drive/folders/0B076kcYDr0DCbzZndW5SMGdjMmM

Chebyshev filter

Chebyshev filter

This was the first experiment performed using Scilab. Digital chebyshev filter was designed using BLT method.
The input parameters were pass band attenuation(Ap), stop band attenuation(As), pass band frequency(Fp), stop band frequency(Fs) and sampling frequency(F). The observed and theoretical values of Ap and As were compared.
The slight difference in the values were due to variations in constant values and inaccuracies in measurement. More the order of the filter, less will be the difference between observed and theoretical Ap and As values.