What is hashing?
A process of converting input data into a fixed-size string of characters
hashing explained in plain English
Analogy
Hashing is like a librarian assigning a unique catalog number to each book in a library. Just as the catalog number helps the librarian quickly locate a book, a hash value helps a computer quickly locate and verify data.
Example
When you create a password for an online account, the password is often hashed and stored on the server. This means that even if someone gains access to the server, they won't be able to obtain your original password, only the hashed version.
How is hashing used?
Hashing is used in various applications, including data storage, password security, and cryptocurrency transactions. It helps to ensure data integrity, authenticity, and confidentiality.
Common misconceptions about hashing
History
The concept of hashing dates back to the 1950s, when it was first used in computer science to optimize data storage and retrieval. Since then, various hashing algorithms have been developed, including SHA-256 and MD5.
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