类：KeyObject

¥Class: KeyObject

Node.js 使用 KeyObject 类来表示对称或非对称密钥，每种密钥暴露不同的功能。crypto.createSecretKey()、crypto.createPublicKey() 和 crypto.createPrivateKey() 方法用于创建 KeyObject 实例。KeyObject 对象不能直接使用 new 关键字创建。

¥Node.js uses a KeyObject class to represent a symmetric or asymmetric key, and each kind of key exposes different functions. The crypto.createSecretKey(), crypto.createPublicKey() and crypto.createPrivateKey() methods are used to create KeyObject instances. KeyObject objects are not to be created directly using the new keyword.

由于改进的安全功能，大多数应用应考虑使用新的 KeyObject API 而不是将密钥作为字符串或 Buffer 传递。

¥Most applications should consider using the new KeyObject API instead of passing keys as strings or Buffers due to improved security features.

KeyObject 实例可以通过 postMessage() 传给其他线程。接收者获得克隆的 KeyObject，KeyObject 不需要在 transferList 参数中列出。

¥KeyObject instances can be passed to other threads via postMessage(). The receiver obtains a cloned KeyObject, and the KeyObject does not need to be listed in the transferList argument.