Added in [API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)   
Deprecated in [API level
37.2](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Methods](https://developer.android.com/reference/android/security/identity/AuthenticationKeyMetadata#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/security/identity/AuthenticationKeyMetadata#inhmethods)

# AuthenticationKeyMetadata

*** ** * ** ***


`
public

final

class
AuthenticationKeyMetadata
`


`

extends https://developer.android.com/reference/java/lang/Object


`

`


`

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.security.identity.AuthenticationKeyMetadata |

<br />

*** ** * ** ***


**This class was deprecated
in API level 37.2.**   

Use `java.security.KeyStore` with the Android hardware-backed keystore instead.

Data about authentication keys.

## Summary

| ### Public methods ||
|---|---|
| ` https://developer.android.com/reference/java/time/Instant` | ` https://developer.android.com/reference/android/security/identity/AuthenticationKeyMetadata#getExpirationDate()() ` *This method is deprecated. Use `java.security.KeyStore` with the Android hardware-backed keystore instead.* |
| ` int` | ` https://developer.android.com/reference/android/security/identity/AuthenticationKeyMetadata#getUsageCount()() ` *This method is deprecated. Use `java.security.KeyStore` with the Android hardware-backed keystore instead.* |

### Inherited methods

From class `

https://developer.android.com/reference/java/lang/Object

` `


https://developer.android.com/reference/java/lang/Object` `
https://developer.android.com/reference/java/lang/Object#clone()()
`

Creates and returns a copy of this object.


`


boolean` `
https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj)
`

Indicates whether some other object is "equal to" this one.


`


void` `
https://developer.android.com/reference/java/lang/Object#finalize()()
`

Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.


`


final

https://developer.android.com/reference/java/lang/Class<?>` `
https://developer.android.com/reference/java/lang/Object#getClass()()
`

Returns the runtime class of this `Object`.


`


int` `
https://developer.android.com/reference/java/lang/Object#hashCode()()
`

Returns a hash code value for the object.


`


final

void` `
https://developer.android.com/reference/java/lang/Object#notify()()
`

Wakes up a single thread that is waiting on this object's
monitor.


`


final

void` `
https://developer.android.com/reference/java/lang/Object#notifyAll()()
`

Wakes up all threads that are waiting on this object's monitor.


`


https://developer.android.com/reference/java/lang/String` `
https://developer.android.com/reference/java/lang/Object#toString()()
`

Returns a string representation of the object.


`


final

void` `
https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos)
`

Causes the current thread to wait until it is awakened, typically
by being *notified* or *interrupted*, or until a
certain amount of real time has elapsed.


`


final

void` `
https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis)
`

Causes the current thread to wait until it is awakened, typically
by being *notified* or *interrupted*, or until a
certain amount of real time has elapsed.


`


final

void` `
https://developer.android.com/reference/java/lang/Object#wait()()
`

Causes the current thread to wait until it is awakened, typically
by being *notified* or *interrupted*.


## Public methods

### getExpirationDate

Added in [API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public Instant getExpirationDate ()
```


**This method is deprecated.**   

Use `java.security.KeyStore` with the Android hardware-backed keystore
instead.

Gets expiration date for the authentication key.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/Instant` | the expiration date of the authentication key. This value cannot be `null`. <br /> |

### getUsageCount

Added in [API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getUsageCount ()
```


**This method is deprecated.**   

Use `java.security.KeyStore` with the Android hardware-backed keystore
instead.

Gets usage count for the authentication key.

<br />

| Returns ||
|---|---|
| `int` | the usage count. Value is 0 or greater <br /> |