Category Archive Information Security

ByJayanthi

Go Green!!

Even as we grumble about the different types of pollution, is is quite ironic to note that “we” are the cause of the pollution! We are the cause of the different types of pollution – air pollution, water pollution, noise pollution. The ocean is our greatest dumping ground. Everything from garbage, cartons, plastic, to untreated sewage water lands in the ocean. Pollution has taken epic proportions and the different types of pollution like air pollution, water pollution, soil pollution are set to control(or already controlling) our life.  Pollution has led to global warming which in turn again affects us directly. Let us see a few ways to reduce pollution and keep our planet green!

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ByJayanthi

Four concepts of Blockchain

Blockchain, the technology disrupter and the decentralized shared ledger has four important points that essentially define it. They are: Consensus, Immutability, Finality, Provenance. This blog post will define these four important concepts.

Provenance:

Blockchain will be a game changer for the supply chain management system. The IBM business blog describes provenance as an “immutable audit trail of ownership & location as it changes over time” (Source: https://www.ibm.com/blogs/insights-on-business/government/proving-provenance-with-blockchain/) This audit trail promotes transparency that can never be achieved with traditional database systems.

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ByJayanthi

Caesar Cipher

After having done a couple of posts on the Blockchain technology for the A2Z Blogchatter challenge, I have resumed my writing in the Information security field and a fun cipher called the ‘Caesar cipher’. But before we see what is Caesar cipher, let us have a brief understanding of Cryptography.

From time immemorial, we are trying to make sure that important and crucial information is readable only by the right people once it has reached its destination. What if a crucial message falls into wrong hands and is read by them? This is prevented by making use of Cryptography and its various strategies.There are a number of ways(or technically called ‘ciphers’) to hide a message and the Caesar cipher is just one of them. This is done by encoding(converting to a special form) the information to be sent at the sender’s end and decoding(re-converting to original form) the information on the receiver’s end.

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ByJayanthi

What is ‘Blockchain’?

Blockchain is the distributed, shared ledger system with no central authority. We have all encountered ledgers in our lives. We have our own personal ledgers for keeping track of transactions. But in the case of a large business scenario, the number of transactions is huge. The number of people keeping track of those very transactions is huge too. Each person involved in the business might have their own version of transactions. Blockchain solves this problem by each ‘node’ having their own copy of the ledger.

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ByJayanthi

Asset

The Blogchatter A to Z has kicked off and I start off my set of posts primarily around the theme of technical and personal posts. My latest fascination has been ‘Blockchain’ and I am striving to do my technical posts around my latest interest. 

‘Blockchain’ is the common shared digital ledger that every participant in the business sees. In the Blockchain world, any thing that has value is  called as an ‘Asset’. Assets are sold and bought and these are recorded on the Blockchain ledger. Asset is the key aspect of Blockchain. 

Assets are further classified into tangible assets and intangible assets. Tangible assets are those that can be seen and visualized. Examples of tangible assets are car, motorcycle, house.

Intangible assets are those that are abstract and cannot be seen but they play an equally vital part in the blockchain  cosmos. Examples of intangible assets are mortgage, patent, trademark. 

Cash is yet another form of ‘asset’ but it is completely anonymous. We cannot track its movements. We don’t know who we received it from and where it will go next. 

We discussed ‘Asset’ in the Blockchain world. Drop by tomorrow as I continue my ‘Blockchain’ journey…

ByJayanthi

Blockchain trainings!

Technology is a fickle thing. The requirements change at the speed of light!(not exactly – but fast enough! :))  No sooner do we think that “Java” is the most required skill in the technology space, in comes,  “Data analytics”, “Security” and “PMP”!!

Now it is artificial intelligence(AI), machine learning and the Blockchain wave that is sweeping the technology landscape and we hear that there will(or there already is) a shortage of professionals in these areas.  This results in organizations and professionals scampering to reskill in these areas and looking for appropriate trainings. This post will list the popular Blockchain trainings around Bangalore, India and around the world.

Deal from GoDaddy!

  1. Edureka:

  Edureka’s ‘Blockchain certification course‘ is a live, instructor led course. This course provides “an overview of the structure and mechanism of Bitcoin, Ethereum, Hyperledger and Multichain Blockchain platforms”( Source: https://www.edureka.co/blockchain-training) In addition, this course teaches you to create your blockchain and render smart contracts on Ethereum.

2. Simplilearn

     Simplilearn offers ‘Blockchain basics‘ course and ‘Blockchain certification course’. Both the courses are online and self-paced. A few points regarding the Blockchain certification course. It helps the learner develop “a strong understanding of Blockchain technology and understand what Bitcoin is and how it works” (Source: https://www.simplilearn.com/blockchain-certification-training)

3. Coursera: IBM Blockchain Foundation for developers

In this course, IBM Blockchain experts guide one to understand the basics of Blockchain technology. It also helps one to build a simple blockchain solution. In addition, there are several tests, quizzes to asses the knowledge of the student.

4. Udemy: 

Udemy has mutiple courses on Blockchain. They can be found at this link

This post just listed a few of the sites that offer Blockchain training. For more information on each of these trainings, click the links given.

Join me as I begin my A to Z BlogChatter Challenge from April 1st!

Karthik Reddy ByKarthik Reddy

2018 Cybersecurity Trends

We are already far into the New year and with it are coming new developments in cybersecurity. 2017 was an exciting year for the cybersecurity industry, and as its growth is bound to continue into 2018, there are plenty of things you need to watch out for. Here, we are going to go over the major ones.

  1. AI Attacks

Artificial intelligence has now entered the mainstream and there is an abundance of free and commercial AI solutions. It was only a matter of time until cybercriminals dived on to the AI trend.

Well, now, they have. AI software can learn from past events in order to help predict and identify cybersecurity threats. AI is used by almost 87% of the US based cybersecurity professionals. However, it is a double-edged sword because hackers can easily use AI to launch sophisticated cyber attacks.

It can, for example, be used to automate the collection of certain information which can be sourced from public domain support forums, code anks and social media platforms.

  1. Ransomware and IoT

The Internet of Things ransomware is not making headlines yet, because IoT typically does not store valuable data. But we should still not underestimate the potential for IoT ransomware to damage devices. For example, critical systems relying on IoT, such as power grids, can fall victim to cybercriminals.

If a cybercriminal was to gain hold of a grid and the ransom was not paid, they could shut down the grid. Other IoT risks include smart cars, smart home appliances and production lines.

  1. Multi-factor Authentication

63% of data breaches involve leveraging weak, stolen or default passwords. This is because many organizations are still using a single-factor authentication, which only relies on the use of a password.

Companies tend to shy away from implementing multi-factor authentication because they think it can damage the user experience. But there is a growing awareness of password theft and, as such, it is likely that we will see a number of companies and websites implementing multi factor authentication as standard.

  1. Adoption of Advanced Cybersecurity Tech

There are many new cybersecurity technologies emerging which we will probably see a wider adoption of in 2018. For example, the use of remote browsers can be useful to isolate your user’s browsing session from the main network.

Speaking of networks, deploying an encrypted VPN can be much more efficient deterrent than a single firewall and antivirus, keeping malware and sniffing well out of striking distance.

Also, dispersion technologies which imitate a company’s most valuable assets act as a honeypot trap for attackers trying to steal the data.

Plus, there will be developments in the use of technologies which can detect and respond to strange behaviour. Endpoint Detection Response systems can monitor endpoints and alert system security admins of suspicious behaviour. Also, network traffic analysis can be used to determine the type, size and origin of data packets, helping to prevent DDoS attacks which can bring down entire networks.

Cybersecurity is a serious industry and is worth over $120 billion. We will only see it grow in the years to come. If you want to learn more about cybercrime and cybersecurity, check out our infographic below.

Cyber crimes Infographic 2018

ByBala Manikandan

Overloading and Overriding Methods in Java

Two terms commonly associated with methods in Java are overloading and overriding. These two concepts will be discussed in the following sections.

Method Overloading

Method overloading is the process of defining more than one method having the same name in the same class (or in the same inheritance tree).

Rules to define overloaded methods:

  • The methods must have the same name.
  • The methods must have different argument lists.
  • They may have same or different return types.
  • Their access levels may be same or different.

The correct method to be executed by the system is decided by the Java compiler at compile time, and this is called static polymorphism. The following example demonstrates method overloading:

public class Test {

       public static int add(int a, int b){    //adds 2 numbers

        return a + b;

    }

       public static String add(String a, String b){  //concatenates 2 Strings with a space in between

        return a + ” ” + b;

    }

       public static void main(String[] args){

           System.out.println(“4 + 5 = ” + add(4, 5));

        //calls 1st method

           System.out.println(“Method + Overloading = ” + add(“Method”, “Overloading”));

        //calls 2nd method

    }

   }

The output of the above program is:

4 + 5 = 9

Method + Overloading = Method Overloading

Method Overriding

Method overriding means giving a new definition to an existing method in a class, in one of its subclasses. This is done to redefine the behaviour of objects of the subclass.

Rules to override a method:

  • The overriding method should be present in the subclass of the class in which the overridden method is present.
  • The overriding and overridden methods should have the same name and argument list.
  • The two methods should have the same return type. Or the return type of the overriding method should be a subclass of that of the overridden method.
  • The access modifier of the overriding method must be either the same as or less restrictive than that of the overridden method.

The method to be executed is decided at runtime (not at compile time), and this is called dynamic polymorphism. The following example demonstrates method overriding:

class A {

    public void display(){

        System.out.println(“Executing from class A”);

    }

}

class B extends A {

    public void display(){               //override the method display()

        System.out.println(“Executing from class B”);

   

    }

}

public class Test1 {

    public static void main(String[] args) {

        A objA = new A();

        A objB = new B();              //an A reference, but a B object

        objA.display();

        objB.display();

   

    }

 

}

The above code prints:

Executing from class A

Executing from class B

We have seen the core concepts of ‘Overloading and Overriding’ in Java in this post… Join me as I uncover more Java concepts in subsequent posts…

ByJayanthi

Use cases of Blockchain

Even as the concept of ‘Blockchain’ is bouncing off everyone’s radar and everyone is keen to know more about this trending topic – let us see more about this new and emerging technology. 

Introduction:

‘Blockchain’ is popularly associated with ‘Bitcoin’ cryptocurrency. The Blockchain system shot into prominence and more industry experts took notice of it only after Bitcoin’s surge and ultimately its downfall!

‘Blockchain’ as you might recollect from my earlier post is the shared ledger system. Each transaction is recorded and added to the shared ledger after being approved by the ‘miners’.  The beauty of ‘Blockchain’ is that each miner or node has a copy of the transaction. None of the transactions can be modified or deleted.It allows total transparency of the system with no central authority and promises complete anonymity and security.

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ByJayanthi

What is Information security?

After having dealt with a huge number of posts on Information security, I thought I will answer one of the fundamental questions about Information security in this post – “What is Information security?” 🙂

Definition:

Information security or “InfoSec” is that discipline of study that broadly seeks to counter and prevent cyber attacks. It also seeks to keep data/information safe by employing different techniques and strategies.

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