AWS SDK Version 3 for .NET
API Reference

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Container for the parameters to the Encrypt operation. Encrypts plaintext into ciphertext by using a customer master key (CMK). The Encrypt operation has two primary use cases:

To perform this operation on a CMK in a different AWS account, specify the key ARN or alias ARN in the value of the KeyId parameter.

Unless you are moving encrypted data from one region to another, you don't use this operation to encrypt a generated data key within a region. To get data keys that are already encrypted, call the GenerateDataKey or GenerateDataKeyWithoutPlaintext operation. Data keys don't need to be encrypted again by calling Encrypt.

To encrypt data locally in your application, use the GenerateDataKey operation to return a plaintext data encryption key and a copy of the key encrypted under the CMK of your choosing.

Inheritance Hierarchy


Namespace: Amazon.KeyManagementService.Model
Assembly: AWSSDK.KeyManagementService.dll
Version: 3.x.y.z


public class EncryptRequest : AmazonKeyManagementServiceRequest

The EncryptRequest type exposes the following members


Public Method EncryptRequest()


Public Property EncryptionContext System.Collections.Generic.Dictionary<System.String, System.String>

Gets and sets the property EncryptionContext.

Name-value pair that specifies the encryption context to be used for authenticated encryption. If used here, the same value must be supplied to the Decrypt API or decryption will fail. For more information, see Encryption Context.

Public Property GrantTokens System.Collections.Generic.List<System.String>

Gets and sets the property GrantTokens.

A list of grant tokens.

For more information, see Grant Tokens in the AWS Key Management Service Developer Guide.

Public Property KeyId System.String

Gets and sets the property KeyId.

A unique identifier for the customer master key (CMK).

To specify a CMK, use its key ID, Amazon Resource Name (ARN), alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a CMK in a different AWS account, you must use the key ARN or alias ARN.

For example:

  • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

  • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

  • Alias name: alias/ExampleAlias

  • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

To get the key ID and key ARN for a CMK, use ListKeys or DescribeKey. To get the alias name and alias ARN, use ListAliases.

Public Property Plaintext System.IO.MemoryStream

Gets and sets the property Plaintext.

Data to be encrypted.


The following example encrypts data with the specified customer master key (CMK).

To encrypt data

var response = client.Encrypt(new EncryptRequest 
    KeyId = "1234abcd-12ab-34cd-56ef-1234567890ab", // The identifier of the CMK to use for encryption. You can use the key ID or Amazon Resource Name (ARN) of the CMK, or the name or ARN of an alias that refers to the CMK.
    Plaintext = new MemoryStream() // The data to encrypt.

MemoryStream ciphertextBlob = response.CiphertextBlob; // The encrypted data (ciphertext).
string keyId = response.KeyId; // The ARN of the CMK that was used to encrypt the data.


Version Information

.NET Standard:
Supported in: 1.3

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms