Introduction

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First of all welcome to professor @pelon53 for lecturer important lesson about Hash and Cryptography. This course cover hash and cryptography deeply and doing some research Google I have learnt about hash and cryptography. Now, I will share my assignment tasks.

1.- Explain what does the resistance to collision mean? And what does resistance to preimage mean?

Resistance to collision

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Resistance to Collision is the prime properties of hash functions. Resistance to collision ideas means that enter into two dissimilar input data and it will show two dissimilar data outputs cannot be the looking same.Collision happen that when 2 dissimilar inputs look the similar hash. But if we think practically, collisions are more less improbable because inputed are uncountable and outputed are countable. Collision can be attempt but it will be nenecessary a large number and resources. Give example:- when you write MOTHER and mother both meanings same but hash functions will be dissimilar. Resistance to Collision in easy term, is that a collision invented is too much difficult if not near unlikely. it is mathematically impossible to find two dissimilar inputs getting same outputs.

Resistance to preimage

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Resistance to Preimage is prime hash functions properties and is one way function, it is nearly impossible to turn over. Resistance to preimage is the impediment to search out what is the inputs data to the output hash. It is too much painful task to find the input from output hash.The preimage function of hash makes it difficult for hackers to get in. But it is not totally impossible because day by day technology is updating scientists discover suppuer-computer and ultra-supper computer but need take a large amount time and some resources but impossible. That types of talking has been proven wrong/incorrect.

Tronscan hash last block and the latest transaction verifying.

To see the last block hash and latest transaction hash, you must visit Tronscan at https://tronscan.org.

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First of all we see block lists and click on the last block

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Click on the last block on the lists of blocks here the last block is number 31769254

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It will display the block details, here the block hash are

0000000001e4c2a6d5631fc4b7edc5c09d6a8de8133d6885ddd8b7b04271dad3

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Now click on the last transaction on the list of transaction to view the transaction details. The lattest transaction hash are

b2904fa01190e7324495394e1703b8854ca14111bb85f01847b79dcade687a3d

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Etherscan last block hash and transaction verifying.

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Etherscan last block hash and lattest transaction hash, you must visit https://etherscan.io and roll down, to see the last block.

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The last block on etherscan is block number 12789415

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Now click on the block to screen the block details.

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Now the block details have been screen, the block hash are

0xc0c55383032c87af3dce43f1dbc21c1de12aca70a26819945345bc6f4d664ccc

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Now click on transaction to view the latest transaction details

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The transaction details have been screen , with a transaction hash are

0xc59734e165cc7aeab54484683ad20346d1172c314b6ed96b17f6b990ebe1d7f5

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3.- Generate the hash using SHA-256, from the word CryptoAcademy and from cryptoacademy. Screenshot required. Do you see any difference between the two words? Explain.

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An online password generator was used to produce the hash function of these two words using SHA256. https://passwordsgenerator.net/sha256-hash-generator/, CryptoAcademy and cryptoacademy.

CryptoAcademy

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CryptoAcademy generated this hash functions are

D03CA34B258E6E0FD06B2070DDE61B50BD4EEF6161A8EDAA4A420C9AE1BEB7F9

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cryptoacademy

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cryptoacademy generated this hash function are

0592F5DD27DC72E675B2AB9C77487A69FAAF84196597FA052EC099C18EE7C4C5

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To the ponint

One Words CryptoAcademy and other word cryptoacademy no change meanings but Hash functions separation each other. So Hash functions has strong privacy power.

4-In your own words explain the difference between hash and cryptography.

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• cryptography main aims is that to provide privacy and reliable as well as provided guarantee that no one can steal any information/ data. While Hash a cryptographic function that is encodes data to totally incomperable alphanumeric bit. Hashes are always unrepeatable.

• Hashing operates as a one way mechanism while Cryptography operates as a two way mechanism.

• Cryptography data are encrypted with keys. Hash unchangeable mechanism and the output can not be replaced.

• Cryptography are used large amount of totally Internet while Hash most of used within Blockchain technology.

• No need keys for Hash functions while Crutography need key only the authorities person.

• Majority cryto user know that all Hash is not cryptography while cryptographics are hash functions.

Conclusion

Through doing this homework by professor @pelon53 , and I have understood about the blockchain technology with regards to hashing and cryptography and I have felt taht what is necessary the world of cryptocurrencies. The assignment have practically helped me gain real world experience on how the two functions task same ways and Alphabet words is invert alphanumeric words.