Introduction

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Hello All steemit friends. I am @colonier. I have read the lecture nicely for more than two/three time and now after getting the points, i am going to start my homework task about Hash and Cryptography for professor @pelon53.

Explain what does the resistance to collision mean? And what does resistance to preimage mean?

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Resistance to collision

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Resistance to Collision is prescribe as a HASH properties. Resistance to collision means that you enter two input different data and you see that output cannot be the same. If you use CRYTO and cryto both out is not same but two meaning same but output totally different. Collision occur when two different inputs screen same hash. But realities, collisions are too much small as like as because of inputs are calculable and the outputs are incalculable. Collision can be attempt but it will ne necessary a lof of time and resources.If we do somewhat change/invert in an inputed data, the outputs we will achieve an completely dissimilar hash. Resistance to Collision in easy term, is that a collision attacks is very hard If not near improbable .It is mathematically task. It is not possible to discovere two dissimilar inputs having same output.

Resistance to preimage

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Resistance to Preimage is one of the prime hash function properties and is a one way function,
Resistance to preimage is the obstacle to discover what was the input data from the output hash. It is very difficult to discover to much input to hash output. It is somewhat improvable to invert.if we see the reality current time is modern era.scientists inventions modern technology But if it is not Improbable to do, but to do it with supercomputer and supersonic computers will carry large amount of time and need large amount of resources. So it will not be Untruths to say. It is Improbable.

Tronscan hash last block and the latest transaction verifying

To view the last block hash and latest transaction hash, you have to visit Tronscan at https://tronscan.org.

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Now roll down to view 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 31750664

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

0000000001e47a087fc5366265a8fdcd046957ac2a778a87e0edcb9754841ef6

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

732b5cea700b81186364b10eef7d512002bcfec4564082c3405911012331de47

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The Etherscan last block hash and transaction verifying.

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To verify etherscan last block hash and latest transaction hash, you have to visit https://etherscan.io and roll down, to see the last block.

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Enter etherscan.io

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The last block on etherscan is block number 12785210

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Now click on the block to display the block details.

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Now the block details have been displayed, the block hash is

0x8a3583f77f1493f67ec3938875417bfa730636a249946166e95760f1f0546228

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Now click on transaction to view the latest transaction details

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

0x02d97f7953ef698bea97c305808a9eaab4339489b88841e701a4fcc28ff80a5a

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Generate hash using SHA-256, with CryptoAcademy and cryptoacademy. Explain the difference.

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An online password generator was used to generate 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 function are

D03CA34B258E6E0FD06B2070DDE61B50BD4EEF6161A8EDAA4A420C9AE1BEB7F9

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CryptoAcademy

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cryptoacademy generated this hash function are

0592F5DD27DC72E675B2AB9C77487A69FAAF84196597FA052EC099C18

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My understanding

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Both meanings same one Alphabet capital letter(CryptoAcademy) and another Alphabet Small letters(cryptoacademy) but both hash functions totally different i am watching those Already I have showed above..really it is secure and reliable we can says undoubtedly

Explain why the two words has different hash functions.

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• Cryptography data are encrypted with Password. Hash immutable mechanism and the output can't be changed.

• Hash has larger use within Blockchain technology while the use of Cryptography enlarges completely the Internet.

• The hash no need password, on the other hand, to decrypt the message in Cryptography it need to know the Password that only the permitted person has.

• All cryptographic is hash functions but all Hash is not Cryptography

Conclusion

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Hash and Cryptography lesson is very important for all cryptocurrency trader and who want to know blockchain platforms. They have a big role to play in blockchain and cryptocurrency. Blockchain technology is highly secure and reliable. Breaking these algorithms system is too much tough. It will take a lof of years to do standing this with present supercomputers.