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# TKTokenKeychainItem

An abstract base class for managing a token’s contents as keychain items.

```
class TKTokenKeychainItem
```

## Overview

Don’t use this base class directly. Instead, use one of its subclasses, such as [`TKTokenKeychainCertificate`](/documentation/CryptoTokenKit/TKTokenKeychainCertificate) for managing certificates or [`TKTokenKeychainKey`](/documentation/CryptoTokenKit/TKTokenKeychainKey) for managing cryptographic keys.

## Topics

### Creating Token Keychain Items

[`-  initWithObjectID:`](/documentation/CryptoTokenKit/TKTokenKeychainItem/init(objectID:))

Initializes a token keychain item with the specified object ID.

### Accessing Keychain Item Attributes

[`objectID`](/documentation/CryptoTokenKit/TKTokenKeychainItem/objectID)

Returns the object ID used for keychain item identification.

[`label`](/documentation/CryptoTokenKit/TKTokenKeychainItem/label)

The user-visible label for the keychain item.

[`constraints`](/documentation/CryptoTokenKit/TKTokenKeychainItem/constraints)

Access constraints for the keychain item, keyed by [`TKTokenOperation`](/documentation/CryptoTokenKit/TKTokenOperation) values wrapped in <doc://com.apple.documentation/documentation/Foundation/NSNumber> objects.

## Relationships

### Conforms To

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`Hashable`](/documentation/Swift/Hashable)

[`Equatable`](/documentation/Swift/Equatable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`CVarArg`](/documentation/Swift/CVarArg)

### Inherited By

[`TKTokenKeychainCertificate`](/documentation/CryptoTokenKit/TKTokenKeychainCertificate)

[`TKTokenKeychainKey`](/documentation/CryptoTokenKit/TKTokenKeychainKey)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

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