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Securing the blockchain

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Cryptocurrencies are on the increase, with at least 100 active, suitably valuated cryptocurrencies being used as tender. However, as some cryptocurrencies have discovered, they are not completely infallible, writes SAURABH KUMAR, CEO of In2IT Tech.

The benefit of Bitcoin, and other virtual digital cryptocurrencies, lies in their anonymity, and with blockchain-based technologies, they are typically thought to be incredibly secure as well. However, as some cryptocurrencies have discovered, they are not completely infallible – and this is doing some damage to the blockchain’s reputation.

What makes the blockchain so secure?

“Normal” transactions, using traditional currency, require a verification process between two parties, typically institutions such as banks or the Reserve Bank. Blockchain based transactions are no different, however the verification process is decentralised and spread across multiple verification points, or nodes. No single party controls any or all aspects of the transaction and verification takes place based on consensus.

Due to the sheer number of nodes that need to verify and approve a transaction, it is incredibly difficult to hack, breach or otherwise intercept a transaction on the blockchain. This has resulted in financial institutions across the globe exploring the blockchain’s potential in other applications.

So why the concern?

Recent hacks that have led to losses of millions of dollars’ worth of cryptocurrency, have stirred up uncertainty within businesses who are exploring the blockchain for trading requirements as well as other areas of business.

In May 2016, the DAO (Decentralised Autonomous Organisation) was launched, and hacked. This project uses cryptocurrency platform Ethereum to crowd fund a decentralised venture capital fund. $70 million dollars in Ether (Ethereum currency) was stolen. At the end of July 2016, Bitfinex, a cryptocurrency exchange, experienced a serious breach resulting in the theft of 120 000 bitcoins. Also in July 2016, Steemit, a blockchain-based blogging platform, was hacked. This hack resulted in the loss of approximately $85 000 in cryptocurrency. Other cryptocurrency platforms to fall victim to hacks include Krypton and Shift, two Ethereum-based blockchains.

While hacking, or otherwise breaching and intercepting, the blockchain is incredibly difficult, these examples show us that it is not impermeable. Companies need to bear in mind that cryptocurrency – successfully implemented in the blockchain –  is still a relatively new technology and, as with any less-than-fully-mature technology, its flaws are yet to be fully realised.

That doesn’t mean that the technology should be discarded or that blockchain investments should be abandoned. Indeed, it is only through continued exploration and ongoing use that one will discover the weaknesses in the blockchain’s armour – and make it stronger than ever.

Addressing the flaws, as they stand

One of the inherent flaws of cryptocurrency lies not with the transactional phase, which takes place on the blockchain, but with its storage. The actual transaction is incredibly secure but, once the transaction has occurred, the parties need to store their cryptocurrency. In a world where everything is connected and touches the Web, storage systems for cryptocurrencies are no different – and are, therefore, accessible by determined cybercriminals. Many large organisations are addressing this by revisiting a siloed approach to storage, using cold storage that is completely cut off from the Internet

Broad-level security on either side is also a concern. Again, while the actual transaction may be secure, the end points might not be. It is possible to intercept the transfer or receipt of cryptocurrencies at either end of the transaction, so trust between parties remains of paramount importance. To respond to this, businesses are looking at private blockchains and not public ones. Private blockchains require a more interpersonal level of transaction and all nodes are known, and pre-approved prior to transacting.

Finally, because the technology resides on underlying networks, the networking design needs to be well thought out and planned with security as top-of-mind. Security must form part of the initial architecture, catering for all manner of current and potential threats so as to minimise any risk of breach through touchpoints on the network.

The future of the blockchain

There are exciting times ahead, for both the future of cryptocurrencies and the blockchain. The world consists of a series of transactions and exchanges, and the blockchain can be applied to virtually every single use case, with careful planning and consideration.

With care and foresight – and an in depth knowledge of the current security landscape of the blockchain – businesses can leverage this technology in a safe, secure and successful fashion, enabling a world of possibilities.

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Win a Poster Heater with Gadget and Takealot.com

This winter Gadget and Takealot.com are giving away three Poster Heaters, which look like posters but become heaters when you plug them in.

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Three Gadget readers will each win a unit, valued at R550 each. To enter, follow @GadgetZA and @Takealot on Twitter and tell us on the @GadgetZA account how many Watts the heater consumes.

What’s the big deal about these heaters? Many of us are struggling to keep the balance between soaring electricity costs and the need to keep warm this winter.

However, the recently launched Poster Heater by EasyHeat and distributed in South Africa by Takealot.com is not only one of the most cost effective electric heaters currently on the market, it is also easy to setup and use.

As the name indicates, it is a poster similar to one you would hang on a wall. But, plug it in and it turns into a 300 Watt heater. The Poster Heater isn’t designed to heat hallways or large rooms, but rather smaller ones like a bedroom or a baby’s nursery or a dressing room.

It uses radiant heating, which means that it heats up in a couple of minutes and the heat is directed at the objects or people around it, quickly taking the chill out of the air and providing a comfortable ambient temperature.

The other advantage of radiant heating is that it doesn’t dry out the air like infrared or gas heaters. Users also don’t have to worry about their children or pets getting too close to it because, even though it gets hot, it can be touched.

To enter the competition follow the steps below:

Competition entry details:

1. Follow @GadgetZA and @Takealot on Twitter. (We will ONLY be accepting entires via Twitter, so please don’t enter through the comments section of this article.)

2. Tell us on Twitter, via @GadgetZA, mentioning @Takealot in your posting, how many Watts the Poster Heater consumes.

cleardot.gif3. The competition closes on 31 July 2018.

4. Winners will be notified via Twitter on 1 August and Takealot.com will be in touch to organise delivery.

5. The competition is only open to South African residents.

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Arts and Entertainment

Deezer to host Hotstix’s Mandela tribute playlist

Deezer is celebrating Nelson Mandela on the centenary of his birthday by hosting a tribute playlist created by music legend Sipho “Hotstix” Mabuse.  

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Mabuse, a legendary figure in African music, first rose to prominence in the 1970s with his band Harari and later developed a name for himself as a solo artist. One of his best known songs was the global hit BurnOut in the 1980s.

The playlist takes the listener on a captivating musical journey through the life of Nelson Mandela.  It was compiled by Mabuse, who consulted with Mandela’s family and friends to ensure that the music would be relevant and accurate. The playlist also features commentary by Mabuse, which was recorded in his Soweto home.  

“I have tried to tell the story of the music that Madiba loved,” says Mabuse. “The Playlist excludes the time in prison obviously, as Madiba would not have had exposure to music in that time.  We have focused on the music we know he loved before and after that period. This recording was really an emotional journey for me, but an incredible opportunity to document these memories.”

The playlist features the music the young Mandela loved, such as The Manhattan Brothers, Solomon Linda, Brenda Fassie and Miriam Makeba.  It includes struggle songs from Chicco, Johnny Clegg, Hugh Masekela and Yvonne Chaka Chaka.  The playlist also includes Mandela by Zahara, one of the younger artists who caught Madiba’s ear.

Mabuse also offers stories of his own songs, such as Shikisha, a song greatly beloved by the former President.

“I was delighted to share my thoughts and hope the listeners enjoyed the musical journey,” says Mabuse. “Madiba did enjoy music immensely and we all have a purpose wherever we are in the world to celebrate culture and to learn from different cultures and music forms and styles.”

This playlist was inspired by the Nelson Mandela 100 campaign, calling on corporates and individuals to act as sources of inspiration and engage in conversation and action.

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