What Is Hashing in Blockchain? | Blockchain Central

The video tutorial explains the concept of hashes and hash functions, emphasizing their importance in modern cryptography and blockchain technology. It covers the properties of hash functions, such as determinism, speed, one-way functionality, and collision resistance. The tutorial also discusses the SHA-256 hash function, its security features, and addresses conspiracy theories about potential backdoors. The video concludes with a summary of the key points and a reminder that the content is not financial advice.

What is the primary role of a hash in modern cryptography?

• To serve as a workhorse in cryptography

• To compress data

• To encrypt data

• To generate random numbers

What is a key feature of a hash function?

• It requires a password

• It is reversible

• It generates a fixed-size output

• It produces variable-sized outputs

Which of the following is a well-known cryptographic hash function?

• SHA-256

• MD5

• AES

• RSA

Why must a cryptographic hash function be one-way?

• To allow easy decryption

• To prevent reverse engineering of the input

• To make it deterministic

• To ensure it is fast

What happens to the hash output when a small change is made to the input?

• The output changes significantly

• The output changes slightly

• The output remains the same

• The output becomes zero

What is a collision in the context of hash functions?

• When a hash function fails to produce an output

• When two different inputs produce the same hash

• When a hash function is too slow

• When a hash function is reversible

What is a common concern regarding the SHA-256 hash function?

• It has a known backdoor

• It is too slow

• It might have a hidden backdoor

• It is not widely used