How do you access hash values?
I'm trying to figure out how to retrieve or access the values stored in a hash. I know hashes store key-value pairs, but I'm not sure how to actually get to those values.
What are hash values used for?
Can you elaborate on the significance and applications of hash values in the realm of cryptography and finance, particularly within the context of blockchain technology and cryptocurrency? How do they contribute to ensuring the integrity and security of transactions and data storage? Additionally, what are some of the challenges or limitations associated with the use of hash values in these domains?