Tag Archive bitcoin

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What is Cryptojacking?

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It just feels like we hear something new about  cryptocurrencies everyday, but let us delve into the concept of ‘Cryptojacking’ in this post.  Having blogged about cryptocurrencies and blockchain before, here are a few facts about them:

  1. ‘Bitcoin’ and ‘Blockchain’ are two entirely different concepts
  2. ‘Bitcoin’ is a cryptocurrency while ‘blockchain’ is the underlying technology powering cryptocurrencies like Bitcoin 
  3. Blockchain is a distributed, immutable and shared ledger
  4. Transactions on a blockchain cannot be edited
  5.  ‘Bitcoin’ is one of the more popular cryptocurrencies based on the ‘Blockchain’ concept. 

Bitcoin’s energy consumption:

Since bitcoin is based on the blockchain concept, where there is no central authority directing the stakeholders(or miners in Blockchain/Bitcoin lingo), the only way a new block(FYI – a ‘block’ is where transactions are recorded) can be created and agreed upon is by means by of mathematics. This is called ‘mining’, which uses humongous amount of energy. Bitcoin mining can be done by simple software and specialized hardware.

Bitcoin’s current electricity consumption is 46.74 TWh!!(Terawatt hours) (Source: https://digiconomist.net/bitcoin-energy-consumption) To put this into perspective, according to one study in April 2018, Bitcoin’s energy consumption numbers were equal to the energy consumption of an entire country like Switzerland! (Source: https://www.forbes.com/sites/shermanlee/2018/04/19/bitcoins-energy-consumption-can-power-an-entire-country-but-eos-is-trying-to-fix-that/#116123d81bc8)

Having understood that bitcoin mining is heavily energy intensive, we can understand that cyber criminals will look for alternate means to mine cryptocurrencies.

Cryptojacking:

This alternate and malicious way to mine cryptocurrencies is by means of a concept known as ‘Cryptojacking’. ‘Cryptojacking’ unsuspectingly makes use of an innocent person’s computer, tablet, phone or any other connected device to mine cryptocurrencies. The innocent individual is lured by means of suspicious email links or online ads which then runs the mining code in the background and drains your energy for wrong purposes.

The unsuspecting user continues to use his computer/connected without knowing that his connected device is being used for malicious purposes.

What do criminals gain from this?

They get bitcoins or any other cryptocurrency with minimal effort and electricity usage on their side. They can then use these cryptocurrencies to buy things that they wish.

How do we detect that cryptomining code is running on your computer:

The only way that we can detect if the cryptomining code is running on our computer is when the computer gets slow or gets heated up. 

How do we prevent cryptojacking?

We can prevent ‘cryptojacking’ by installing ad-blocking and anti-cryptomining extensions. Users should also turn off Javascript in the browser and be wary of phishing emails. It is also necessary to keep up with the latest in the security realm and install all patches as and when they are released. 

Future of cryptojacking:

The current damage caused by ‘Cryptojacking’ may only be slowing down of the device but this malicious attack may evolve further with time and pose a risk to personal and financial information. According to this report from eset.com, cryptojacking may not be slowing in 2019. So, it is necessary to take note of this attack and be knowledgeable about it and guard against it.

 

Avatar ByJayanthi

Bitcoin and Blockchain: What next?

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It seems every other day has a new headline regarding ‘Bitcoins’. I am sure most of us give a casual glance at this word and wonder where it will go next. From a humble value of $1019 on January 1,2017 the value of Bitcoin has soared to $16,860 till date. This type of meteoric rise will obviously roll a few eyes! 🙂

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I had already written about Bitcoins in my earlier post “Introduction to Bitcoins“. Let’s refresh briefly:

  1. ‘Bitcoin’ is a cryptocurrency
  2. It was created by a highly doubtful ‘Satoshi Nakamoto’ in January 2009
  3. It does not have any physical form
  4. It is largely based on ‘decentralised’ way of transacting business or the ‘blockchain'(no common authority to enforce regulation)
  5. It is accepted in a few countries and some goods can be bought with them
  6. Acceptance by different governments and countries is still an ongoing process
  7. In addition to its legal use,it is also used for illegal activities

What is Blockchain?

‘Blockchain’ is the underlying technology that supports Bitcoin. In simple terms, blockchain is a global ledger. Sending and receiving bitcoins are some example of transactions. A group of transactions will be considered as a ‘block’ which when approved is added to the ‘chain’. This chain cannot be deleted or changed. It is continously added and maintained by all nodes in the network.

Without a regulating authority like a bank, ‘blockchain’ has kept the Bitcoin journey alive for the past 8 years!

 

Future of Bitcoin:

I am no Bitcoin analyst and I do not have the crystal ball, but I can certainly state a few things! 🙂

  1. ‘Bitcoin’ and other cryptocurrencies will continue to hold people’s imagination and urge to invest for at least a certain period of time
  2. Since it is a completely volatile currency, it is not for the faint hearted
  3. Since it is not regulated, people with disposable income are the best individuals to invest in Bitcoin
  4. Even if one would like to invest in Bitcoin, good to start with a small amount
  5. Since the technology itself is evolving and nobody understands its implications fully, better to wait and watch and understand the nitty gritty details of ‘Bitcoin’.

Whether the cryptocurrencies will stand the test of time, the underlying blockchain technology will definitely shake things up in the technology world and will most likely outlive ‘Bitcoin’!

Most of the world’s top universities including Stanford university, Princeton university and e-learning portals like udemy, Coursera have taken notice and started courses in Blockchain.