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Updated on 2025-09-15 GMT+08:00
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What Cryptography Algorithms Does DEW Use?

Key Algorithms and Specifications Supported by KMS

Table 1 Key algorithms supported by KMS

Key Type

Algorithm Type

Key Specifications

Description

Scenario

Symmetric key

AES

AES_256

AES symmetric key
  • Data encryption and decryption
  • DEK encryption and decryption
    NOTE:

    You can encrypt and decrypt a small amount of data using the online tool on the console.

    You need to call APIs to encrypt and decrypt a large amount of data.

Digest key

SHA
  • HMAC_256
  • HMAC_384
  • HMAC_512

Digest key
  • Data tampering prevention
  • Data integrity verification

Asymmetric key

RSA
  • RSA_2048
  • RSA_3072
  • RSA_4096

RSA asymmetric key
  • Digital signature and signature verification
  • Data encryption and decryption
    NOTE:

    Asymmetric keys are applicable to signature and signature verification scenarios. Asymmetric keys are not efficient enough for data encryption. Symmetric keys are suitable for encrypting and decrypting data.

Asymmetric key

ECC
  • EC_P256
  • EC_P384

Elliptic curve recommended by NIST

Digital signature and signature verification

Table 2 describes the encryption and decryption algorithms supported for user-imported keys.

Table 2 Key wrapping algorithms

Algorithm

Description

Configuration

RSAES_OAEP_SHA_256

RSA algorithm that uses OAEP and has the SHA-256 hash function

Select an algorithm based on your HSM functions.

If the HSMs support the RSAES_OAEP_SHA_256 algorithm, use RSAES_OAEP_SHA_256 to encrypt key materials.

NOTICE:

The RSAES_OAEP_SHA_1 algorithm is no longer secure. Exercise caution when performing this operation.

RSAES_OAEP_SHA_1

RSA algorithm that uses Optimal Asymmetric Encryption Padding (OAEP) and has the SHA-1 hash function

Cryptographic Algorithms Supported by KPS

  • The SSH key pairs created on the management console support the following cryptographic algorithms:
    • SSH-ED25519
    • ECDSA-SHA2-NISTP256
    • ECDSA-SHA2-NISTP384
    • ECDSA-SHA2-NISTP521
    • SSH_RSA: The length can be 2,048, 3,072, or 4,096 bits.
  • The SSH keys imported to the KPS console support the following cryptographic algorithms:
    • SSH-DSS (not recommended)
    • SSH-ED25519
    • ECDSA-SHA2-NISTP256
    • ECDSA-SHA2-NISTP384
    • ECDSA-SHA2-NISTP521
    • SSH_RSA: The length can be 2,048, 3,072, or 4,096 bits.

Supported Cryptography Algorithms

You can use international common cryptographic algorithms to meet various user requirements.

Table 3 Supported cryptography algorithms

Category

Common Cryptographic Algorithm

Symmetric cryptographic algorithm

AES

Asymmetric cryptographic algorithm

RSA, DSA, ECDSA, DH, and ECDH

Digest algorithm

SHA1, SHA256, and SHA384
Parent topic: About DEW