> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nebius.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Key Management Service in Nebius AI Cloud

Key Management Service (KMS) is a Nebius AI Cloud service that enables you to issue and store cryptographic keys, so you can protect and secure your applications. By using KMS symmetric and asymmetric keys, you can encrypt and decrypt data, sign hashes or apply envelope encryption.

The service is [in preview](/overview/services#service-and-application-stages), and available in all [Nebius AI Cloud regions](/overview/regions/).

<CardGroup cols={2}>
  <Card title="Getting started with symmetric keys" icon="link" href="/kms/quickstart/symmetric">
    Create your first symmetric key and use it to encrypt and decrypt data
  </Card>

  <Card title="Getting started with asymmetric keys" icon="link" href="/kms/quickstart/asymmetric">
    Create your first asymmetric key and use it to sign a hash and verify the signature
  </Card>

  <Card title="Key types and operations" icon="link" href="/kms/types-operations">
    Learn about different key types and cryptographic operations available for each of them
  </Card>

  <Card title="Creating keys" icon="link" href="/kms/manage/create">
    Learn how to manage keys and their parameters
  </Card>

  <Card title="Cryptographic operations with symmetric keys" icon="link" href="/kms/cryptography/symmetric">
    Use symmetric keys to encrypt and decrypt data
  </Card>

  <Card title="Cryptographic operations with asymmetric keys" icon="link" href="/kms/cryptography/asymmetric">
    Use asymmetric keys for data encryption and digital signatures
  </Card>

  <Card title="Quotas and constraints" icon="link" href="/kms/resources/quotas-limits">
    Get acquainted with the default quotas and constraints in KMS
  </Card>
</CardGroup>