I require Document with abstract, introduction and explanation and references and PPT Topic : Security in Blockchains https://ieeexplore.ieee.org/document/8946277 • https://cointelegraph.com/news/

I require Document with abstract, introduction and explanation and references and PPT 

Topic :  Security in Blockchains 

 https://ieeexplore.ieee.org/document/8946277 • https://cointelegraph.com/news/blockchainsecurity-preventing-fraud-on-distributedledger-technology

thank you