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diagram

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Tanner Nelson 2017-03-03 19:45:41 +01:00
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Hashing is a one way method of converting arbitrary data into a fixed size format. Unlike ciphers, data that is hashed cannot be retrieved from the resulting digest. Hashes can be used to create keys, file identifiers, or store credentials.
<img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/Hash_table_4_1_1_0_0_1_0_LL.svg/240px-Hash_table_4_1_1_0_0_1_0_LL.svg.png" width="240" height="184">
> Hash function diagram from [Wikipedia](https://en.wikipedia.org/wiki/Hash_function).
!!! warning
Avoid storing passwords if possible. If you must, please make sure to research the state of the art before continuing.
Avoid storing password hashes if possible. If you must, please make sure to research the state of the art before continuing.
## Make
To hash a string, use the `hash` class on `Droplet`.
To hash a string, use the `hash` property on `Droplet`.
```swift
let digest = try drop.hash.make("vapor")