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# Checksums

A collection of integrity checksums for a background asset upload file, used to verify successful delivery.

```
object Checksums
```

## Topics

### Dictionaries

[`object Checksums.Composite`](/documentation/AppStoreConnectAPI/Checksums/Composite-data.dictionary)

A composite checksum covering the entirety of a background asset upload file.

[`object Checksums.File`](/documentation/AppStoreConnectAPI/Checksums/File-data.dictionary)

A per-file checksum used to verify the integrity of an individual background asset upload file.


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