18 Questions
What is the concept of avalanche effect in hash functions?
The concept of avalanche effect in hash functions is that a slight change in the input results in a significant change in the output digest.
What is the purpose of a cryptographic hash function?
The purpose of a cryptographic hash function is to ensure the integrity and authenticity of the input data.
What is the significance of the blockchain concept developed by Stornetta in 1991?
The significance of the blockchain concept developed by Stornetta in 1991 is that it allows for the creation of a tamper-proof chain of blocks, enabling the secure documentation of multiple edits to a digital document.
What is the primary goal of blockchain security?
The primary goal of blockchain security is to ensure the integrity and confidentiality of the data stored on the blockchain.
What is the role of a block header in a blockchain?
The role of a block header is to provide a summary of the block's contents, including the cryptographic hash of the previous block, to ensure the integrity of the blockchain.
What is the significance of a distributed ledger in blockchain technology?
The significance of a distributed ledger in blockchain technology is that it allows for the decentralized and transparent recording of transactions on the blockchain.
What is the primary purpose of including the previous block's hash in a block header?
To make the blockchain tamperproof by creating a chain of blocks where each block inherits from the previous block.
How does the use of hash functions contribute to the security of a blockchain?
It makes it difficult to tamper with the blockchain by creating a chain of blocks where each block's hash is dependent on the previous block's hash.
What is the role of the 'Previous block hash' in a block header?
It is used to construct the current block's hash, thereby creating a chain of blocks.
Why is it difficult to tamper with a block in a blockchain?
Because changing a block would require changing the hash values of all subsequent blocks, which is computationally infeasible.
What is the purpose of mining in the context of blockchain?
To generate the hash value for a block.
How does the blockchain's distributed nature contribute to its security?
It makes it difficult for a single entity to tamper with the blockchain, as changes would need to be made to multiple blocks across the network.
What is the primary reason why hash functions are called one-way?
Given x and hash function H, we can compute H(x), but when H(x) is given, we cannot determine the corresponding value of x.
What is the significance of Property 2 in hash functions?
For two different inputs x and y, H(x) and H(y) should be different.
What is the term used to describe the phenomenon where a small change in the input results in a significant change in the output hash?
Avalanche effect
What is the primary purpose of using cryptographic hash functions in blockchain technology?
To ensure data integrity and tamper-proofing
What is the term used to describe the unique output of a hash function?
Message digest
Why are cryptographic hash functions considered cryptographically secure?
They are one-way, meaning it is computationally infeasible to determine the original input from its hash output.
Learn how hash functions construct a chain-like structure in blockchain technology. Understand how each block inherits from the previous one and how hashes are connected.
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