I have found some definitions regarding such concepts but not adequate enough to fully understand the essence of the above issues:blockchain, bitcoin
The American security researcher Dan Kaminsky is quoted as "The first five times you think you understand [Bitcoin], you don’t". You will need some time to grasp those concepts (Bitcoin is basically an application that has the Blockchain as a building block) and just reading some definitions will not help you much. There is a free MOOC on Coursera entitled "Bitcoin and Cryptocurrency Technologies" from Princeton University, which I highly recommend.
This is a wonderful and easy to follow article that will make you understand the high-level concepts of Blockchain.
https://hackernoon.com/wtf-is-the-blockchain-1da89ba19348
Good luck
At least I now know that the bitcoin/ blockchain staff is some thing that we can trust. Better than our African Governments!
Do check this article that was written in 2015, titled "The great chain of being sure about things":
https://www.economist.com/briefing/2015/10/31/the-great-chain-of-being-sure-about-things
or perhaps this book "Bitcoin and Cryptocurrency Technologies A Comprehensive Introduction" by Narayanan, et al.
As far as trust is concerned, you must be aware that Blockchain technology can also be used for supervision and to exert power. In this respect it might have many advantages and disadvantages, most of which are not fully explored yet.
https://www.ibm.com/blogs/blockchain/2017/05/the-difference-between-bitcoin-and-blockchain-for-business/
http://bitcoindaily.org/bitcoin-vs-blockchain-technology/
I hope these resources help :)
Blockchain is a peer-to-peer network of computing nodes where any node on the network has to be validated before interacting with other nodes and where this interaction is never complete until a miner(s) (a node or group of nodes) executes the mining process. The mining process takes care of the cryptographic processes as well as other processes and synchronisations that ensure that the action or interaction or transaction initiated by a node is transparently completed (permanently) recorded as a block on the existing chain of previous blocks.
Bitcoin is a crytocurrency that represents the first implementation of blockchain technology.
Article The road to the blockchain technology: Concept and types
This research paper give a stright forward explination for Blockchain with examples
Details are in my book: Bitcoin: The Mother of all Scams. https://www.amazon.com/gp/product/B095NMLM2F
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