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You're reading from  CompTIA Security+: SY0-601 Certification Guide - Second Edition

Product typeBook
Published inDec 2020
PublisherPackt
ISBN-139781800564244
Edition2nd Edition
Tools
Kali Linux
Concepts
Cybersecurity
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Author (1)
Ian Neil
Ian Neil
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Ian Neil

Ian Neil is one of the world's top trainers of Security+. He is able to break down information into manageable chunks so that people with no background knowledge can gain the skills required to become certified. He has recently worked for the US Army in Europe and designed a Security+ course that catered to people from all backgrounds (not just IT professionals), with an extremely successful pass rate. He is an MCT, MCSE, A+, Network+, Security+, CASP, and RESILIA practitioner that has worked with high-end training providers over the past 23 years and was one of the first technical trainers to train Microsoft internal staff when they opened their Bucharest Office in 2006.
Read more about Ian Neil

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Blockchain and the Public Ledger

Blockchain was originally the technology that powered Bitcoin, but it has greater scope than that. It is a digital ledger of transactions where the data is stored in batches called blocks that are distributed to many computers. Therefore, if you wanted to tamper with the blockchain, it would be impossible as you would have to change the data on every computer holding a copy. As they say, there is safety in numbers.

Blockchain can be used to store financial, medical, or land sale transactions. This data is chained together with a block of data holding both the hash for that block and the hash of the preceding block. To create a new block on the chain, the computer that wishes to add the block solves a cryptographic puzzle and sends the solution to the other computers participating in that blockchain. This is known as proof of work. Once that has been verified by those computers on this network, a new block is added to the end of the chain. Should...

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CompTIA Security+: SY0-601 Certification Guide - Second Edition
Published in: Dec 2020Publisher: PacktISBN-13: 9781800564244
© 2020 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Ian Neil

Ian Neil is one of the world's top trainers of Security+. He is able to break down information into manageable chunks so that people with no background knowledge can gain the skills required to become certified. He has recently worked for the US Army in Europe and designed a Security+ course that catered to people from all backgrounds (not just IT professionals), with an extremely successful pass rate. He is an MCT, MCSE, A+, Network+, Security+, CASP, and RESILIA practitioner that has worked with high-end training providers over the past 23 years and was one of the first technical trainers to train Microsoft internal staff when they opened their Bucharest Office in 2006.
Read more about Ian Neil

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