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# init(requiringSecureCoding:)

Creates an archiver to encode data, and optionally disables secure coding.

```
init(requiringSecureCoding requiresSecureCoding: Bool)
```

## Parameters

`requiresSecureCoding`

A Boolean value indicating whether all encoded objects must conform to [`NSSecureCoding`](/documentation/Foundation/NSSecureCoding).

## Discussion

To prevent the possibility of encoding an object that [`NSKeyedUnarchiver`](/documentation/Foundation/NSKeyedUnarchiver) can’t decode, set `requiresSecureCoding` to <doc://com.apple.documentation/documentation/Swift/true> whenever possible. This ensures that all encoded objects conform to [`NSSecureCoding`](/documentation/Foundation/NSSecureCoding).

> Note:
> Enabling secure coding doesn’t change the output format of the archive. This means that you can encode archives with secure coding enabled, and decode them later with secure coding disabled.

## See Also

[`requiresSecureCoding`](/documentation/Foundation/NSKeyedArchiver/requiresSecureCoding)

Indicates whether the archiver requires all archived classes to resist object substitution attacks.


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