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City collaboration explores internet of things security solution

City’s Professor Muttukrishnan Rajarajan is part of a research collaboration with the Indian Institute of Technology Kharagpur exploring the use of blockchain architecture within Internet of Things (IoT) security applications for healthcare data sharing.

First published Friday, 11th August, 2017 by John Stevenson (Senior Communications Officer)1

City Collaboration Explores Internet Of Things Security Solution
A consortium of network security engineers from the UK and India drawn from academia and industry are exploiting the possibilities within blockchain architecture to provide security in Internet of Things (IoT) applications for healthcare data sharing. Professor of Network Engineering at City, University of London, Professor Muttukrishnan Rajarajan2, a UK-based member of the consortium said: Our consortium will be exploring the use of a privacy-preserving blockchain architecture for IoT applications in healthcare data sharing, using attribute-based (ABE) encryption to provide greater security for the devices .

Due to low voltage powering many devices drawn together by the IoT, the use of these devices are frequently compromised by their lack of sophisticated security measures.” City Collaboration Explores Internet Of Things Security SolutionThe research comes against the backdrop of the recent WannaCry ransomeware attack of May 12th 2017, which severely crippled operations of the UK s National Health Service causing it to run some of its services on an emergency-only basis during the attack. Tamper-proof

The IoT refers to a system of interrelated computing devices, mechanical and digital machines, objects, animals or people that are provided with unique identifiers and the ability to transfer data over a network without requiring human-to-human and human-to-computer interaction. Blockchain is a distributed ledger technology (DTL), which keeps a permanent, tamper-proof listing of records . The blockchain maintains the records, or blocks of information, through a peer-to-peer network; there is no central control and everyone if the network shares control of the data.

Professor Rajarajan says the use of blockchain technology in the internet of things has three main security advantages:

  • The sensor data generated by IoT devices will be rigorously verified by a number of data miners in the blockchain network for legitimacy before being accepted which will mitigate several security attacks including data manipulation;
  • Once the data is accepted and appended to the blockchain the data will not be intercepted; There is no central authority or storage sever and therefore the trust of each node will be built by reputation:
  • If there is a malicious node propagating false data it can be identified by data miners and the reputation of the node will be damaged.

Professor Sudip Misra of the Indian Institute of Technology Kharagpur is also a member of the collaborative research project.

Join the conversation #ProfessorMuttukrishnanRajarajan#InternetofThings#Blockchain#NetworkEngineering#MCSE#Cryptography


  1. ^ John Stevenson (Senior Communications Officer) (
  2. ^ Professor Muttukrishnan Rajarajan (

Hero security guard leaps into swimming pool to rescue toddler trapped upside down in inflatable ring

This is the moment an heroic security guard leapt into a swimming pool after spotting a toddler trapped upside down in an inflatable rubber ring. The heart-stopping scene saw the unnamed three-year-old boy desperately attempting to wriggle free from the ring. In video footage of the incident, he can be seen swimming along inside his pink inflatable before accidentally flipping it upside down – and nobody immediately close by who can rescue him.

His head is then submerged underwater with his legs wriggling around in the air for several seconds. Fortunately he was spotted by the alert guard as well as another parent who immediately swung into action.

The guard jumps into the pool alongside another parent The boy can be seen flipped upside down inside the rubber ring

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CCTV1 footage shows them both jumping over the swimming pool fence, while the man, known only as Ma, leaps fully clothed into the water to save the drowning boy, who was thankfully not harmed. Ma, who works at the park in Sanya City, South China s Hainan Province, is being hailed a hero.

He said the boy had been swimming with a grandparent, but the elderly relative was not nearby at the time.

Ma walks from the pool with the boy in his arms

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Ma told the boy s parents that there was “no need” to thank him. This May a young boy from East China nearly drowned in similar circumstances when his swim ring flipped upside down. The child was submerged with his head underwater for 72 seconds before staff at the swimming pool spotted him.


  1. ^ CCTV (

Afghan Officials Tighten Kabul Security After Series Of Attacks

Afghan authorities in Kabul are increasing security in the area of the capital that houses foreign embassies and government offices after a series of attacks killed hundreds of people in the city and across the country. Salem Ehsaas, acting police chief of Kabul, told Reuters on August 6 that our priority is the diplomatic area” in the new security plan for the center of the city.

“The highest threat level is in this area, and so we need to provide a better security here,” he said. United Nations figures show that 209 civilians have been killed and 777 injured in suicide and other attacks, mostly blamed on the Taliban, in the first half of the year in the Afghan capital.

Among the larger attacks, a massive truck bomb blast in Kabul s diplomatic sector on May 31 killed about 150 people and wounded around 400 others, mostly civilians. On July 24, a Taliban suicide car bomb killed at least 26 people and wounded 41 others in the western part of the city. Outside of the capital, up to 50 people, including women and children, were killed after Taliban militants seized control of a village the Sayad district of the northern province of Sari Pu on August 5.

Underscoring concerns in the capital, Afghan intelligence officials said on August 6 they had seized a truck in Kabul carrying more than 16 tons of explosives hidden in boxes marked as poultry feed.

“It was loaded with explosives to make bombs, suicide vests . and conduct terrorist activities in Kabul,” the National Directorate of Security said. Included in the new security will 27 permanent checkpoints along the 42 roads through the diplomatic zone.

They will be supported by mobile explosives scanners, sniffer dogs, and security cameras. Trucks arriving in the city will be checked by scanners at four of the eight main entry points . The other four sites will get scanners at a later date, officials said.

Officials estimated that the measures will be fully in place within six months.

With reporting by Reuters and ToloNews