Steemit Crypto Academy | Summary On Homework Task: The CryptoGraphy.

Hello Everyone,

Thank you to all for joining the Third Season and 8th week Of Steemit Crypto Academy and Participated In The Homework Task.

All homework task with the correct tag #stream4u-s3week8 has been reviewed now and re-checked to confirmed no one is missed.

Total 142 homework Tasks received for Homework Task The CryptoGraphy under the tag #stream4u-s3week8.

This post is to summarise the last week's Homework Task, The CryptoGraphy.

So, last week learned about CryptoGraphy and see how the logic of Cryptocurrencies works in the transactions, Wallets, Public and Private key.

Overall the Homework Task received for the CryptoGraphy was good, this time I used a new format to review the Homework Task and I hope this new format of Grading will help you to understand where improvement is needed.

The majority of Homework tasks lacked in the topic Merkle tree. In the Merkle tree, it was expected to provide the details, then show the Graph module, and then the information that is shown into the Graph module you could try to explain the same in theory, because this topic will be easy to explain by Graph module, how the hash value of each block gets clubbed and produce new hash, then at last Hash call as Merkle Root. But many users have done well and explained the Merkle tree properly.

The second topic where the majority of Task lacked is Practical + Theory, in this question, it was informed to do proper research on the functionality of Key, Signature, Transaction, Blockchain and accordingly explain each one. First of all few tasks were found in which the Blockchain section is not defined and completely missed.

In this section, you all have performed well as per the practical point of view but while provided the theory detail based on practical, the majority of tasks just mentioned that the Block gets invalid, but here the next question should come to mind how we will know that the Block gets invalid, see there is not any prompt that tells us that it is invalid, its completely we have to find what changed due to that the Block gets invalid, let's take a below simple example.

The below is a simple example of a Block with some transactions filled in it already.

As we know already that in Blockchain each and every Block is connected to each other with the Hash of the previous Block, like Block 3 connected to Block 2 with Hash of Block 2, Block 4 connected to the Block 3 with the Hash of Block 3.

So, whenever or whatever changes are made into the Block then the Block gets invalid, now we will know that the Block is invalid, here we should always look at the Hash value of the Block, let's take a below simple example.

So, when I tried to change the transaction value, the block has generated a different hash which is an invalid Hash value, and since it is responsible for the next block hence the next Block also got invalid, yet the Nonce value was the same but Hash changed, also Signature of the Transaction turn invalid which we can see by its color Red.

Further, as we know to turn the invalid Hash/Block into the valid we have to go by a process called Mining.

When we complete the mining process, we get a new valid hash and the Block becomes valid, but in this valid Block the changes of the transaction still remain as Red which means invalid, because the Signature value which was earlier there was for a valid transaction and labeled with the same, also we learned different transaction has a different Signature so which was there already will not change.

The rest of the other topics given in the questions were explored very well and no big issue was found.

Presentation of the task is continually improving that we can see through the Homework tasks and you all are doing great in this.

PLAGIARISM, this is still an issue as we still receiving task which has plagiarism content. We performed extensive testing on the contents hence requesting you to do not copy contents from the other sources, and try to provide your own words.

As we know that the Season 3 of the Crypto Academy is now reached an end, the good thing is the participation ratio in the Homework Task was increased continually each week.

including last week, below is the progress ratio found in all weeks in Season 3 for @Stream4u Homework Task, a Total of 435 Homework Task received in Season 3.

Below is the overall ratio for the grading performance in #stream4u-s3week8

Congratulations.

IMPORTANT NOTE.

The new season of Steemit Crypto Academy is now also recruiting a new role of Promoters, for more details on this, please check Steemit Crypto Academy Weekly Update [ August 23rd, 2021 ] - Recruiting Professors and Promoters.

Thank You.
@stream4u
Crypto Professors : Steemit Crypto Academy