aesGcmParams.iv

• 类型：<ArrayBuffer> | <TypedArray> | <DataView> | <Buffer>

  ¥Type: <ArrayBuffer> | <TypedArray> | <DataView> | <Buffer>

对于使用给定密钥的每个加密操作，初始化向量必须是唯一的。

¥The initialization vector must be unique for every encryption operation using a given key.

理想情况下，这是一个确定性的 12 字节值，其计算方式保证在使用相同密钥的所有调用中都是唯一的。或者，初始化向量可以由至少 12 个加密随机字节组成。有关为 AES-GCM 构造初始化向量的更多信息，请参阅 NIST SP 800-38D 的第 8 节。

¥Ideally, this is a deterministic 12-byte value that is computed in such a way that it is guaranteed to be unique across all invocations that use the same key. Alternatively, the initialization vector may consist of at least 12 cryptographically random bytes. For more information on constructing initialization vectors for AES-GCM, refer to Section 8 of NIST SP 800-38D.