Part 3/8:
To clarify: while it might be possible for quantum computing to expedite the hashing function used in Bitcoin, current beliefs hold that it cannot reverse-engineer data from a hash. Hash functions turn input data into a fixed-size output, and even the slightest change in input would yield a completely different hash. Therefore, while the reverse engineering of public-private key cryptography remains a concern, Bitcoin's hashing remains secure—at least for now.