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Yandex Key Management Service
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In this article:

  • gRPC request
  • SymmetricReEncryptRequest
  • SymmetricReEncryptResponse
  1. API reference
  2. gRPC
  3. SymmetricCrypto
  4. ReEncrypt

Key Management Service API, gRPC: SymmetricCryptoService.ReEncrypt

Written by
Yandex Cloud
Updated at December 9, 2025
  • gRPC request
  • SymmetricReEncryptRequest
  • SymmetricReEncryptResponse

Re-encrypts a ciphertext with the specified KMS key.

gRPC requestgRPC request

rpc ReEncrypt (SymmetricReEncryptRequest) returns (SymmetricReEncryptResponse)

SymmetricReEncryptRequestSymmetricReEncryptRequest

{
  "key_id": "string",
  "version_id": "string",
  "aad_context": "bytes",
  "source_key_id": "string",
  "source_aad_context": "bytes",
  "ciphertext": "bytes"
}

Field

Description

key_id

string

Required field. ID of the new key to be used for encryption.

The maximum string length in characters is 50.

version_id

string

ID of the version of the new key to be used for encryption.
Defaults to the primary version if not specified.

The maximum string length in characters is 50.

aad_context

bytes

Additional authenticated data to be required for decryption.
Should be encoded with base64.

The maximum string length in characters is 8192.

source_key_id

string

Required field. ID of the key that the ciphertext is currently encrypted with. May be the same as for the new key.

The maximum string length in characters is 50.

source_aad_context

bytes

Additional authenticated data provided with the initial encryption request.
Should be encoded with base64.

The maximum string length in characters is 8192.

ciphertext

bytes

Required field. Ciphertext to re-encrypt.
Should be encoded with base64.

SymmetricReEncryptResponseSymmetricReEncryptResponse

{
  "key_id": "string",
  "version_id": "string",
  "source_key_id": "string",
  "source_version_id": "string",
  "ciphertext": "bytes"
}

Field

Description

key_id

string

ID of the key that the ciphertext is encrypted with now.

version_id

string

ID of key version that was used for encryption.

source_key_id

string

ID of the key that the ciphertext was encrypted with previously.

source_version_id

string

ID of the key version that was used to decrypt the re-encrypted ciphertext.

ciphertext

bytes

Resulting re-encrypted ciphertext.

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