Safe and Reliable Key Lifecycle Management on the Cloud
Alibaba Cloud Key Management Service (KMS) provides secure and compliant key management and cryptography services to help you encrypt and protect sensitive data assets. KMS is integrated with a wide range of Alibaba Cloud services to allow you to encrypt data across the cloud and to control its distributed environment. KMS provides key usage logs via ActionTrail, supports custom key rotation, and provides HSMs that have passed FIPS 140-2 Level 3 or other relevant validation, to help you meet your regulatory and compliance needs.
Fully managed
KMS provides key management and cryptography services. You manage the lifecycle and permissions of keys, use them for encryption and signing while Alibaba Cloud fully manages the cryptographic infrastructure and ensures service availability, security, and reliability.
Availability, reliability, and elasticity
KMS processes your requests with low latency via redundant cryptographic modules across availability zones in each region and scales to meet your needs to create as many keys. You can bring your own key to KMS and keep a copy offline for more durability.
Security and Compliance
KMS ensures stringent protection of your keys on Alibaba Cloud with secure design and review. KMS helps you quickly meet regulatory and compliance requirements by offering managed HSMs that have passed FIPS 140-2 Level 3 or other relevant validation, by allowing you to configure custom key rotation policies, to manage permissions in RAM, and to track key usage in ActionTrail. You can pipe ActionTrail events to OSS or Log Service to integrate with SIEM solution for more analysis and threat detection.
Data Encryption for Integrated Cloud Services
KMS is integrated with a wide range of Alibaba Cloud services such as ECS, RDS, OSS, NAS, and MaxCompute. With minimum cost of key management, you can leverage KMS to encrypt data in these services and maintain control over their distributed compute and storage environment. With server-side encryption such as OSS SSE or database TDE, you control encryption behavior via KMS and RAM, while Alibaba Cloud handles the complication and pay for the execution of the encryption workload for you.
Custom Encryption and Digital Signatures
KMS encapsulates simplified cryptography and HSM APIs for you to easily encrypt data in your application for integrated security and compliance, further reducing the attack surface to sensitive data from adversaries. You can also use asymmetric keys for digital signing to ensure integrity of critical data.
Cost-effectiveness
With KMS, you only pay for the resources that you use, eliminating the need for HSM purchase and associated cost of continuous hardware operation, patching and replacements. KMS helps you reduce the cost of building and maintaining your own key management infrastructure.
Features
Comprehensive Management Features
KMS provides rich key management features to meet all your needs.
Keys Generated in KMS or Imported from External Sources
You can generate keys in KMS or import Bring Your Own Keys (BYOKs) to managed HSMs. BYOKs allow you to keep additional offline key copies. Managed HSMs ensure that imported keys will not be exported.
Key Lifecycle Management and Automatic Key Rotation
You can enable or disable keys, or schedule a regular cycle to delete keys. For BYOK, you can delete keys at any time, or specify an automatic expiration policy. KMS allows you to configure custom rotation policies to automatically rotate encryption keys periodically and therefore enhance the security of keys.
Authentication, Authorization, and Auditing (AAA)
You can manage KMS user authentication and authorization policies through RAM. You can track and audit key usage through ActionTrail, or store key usage logs in OSS or Log Service for diverse scenarios such as long-term storage, data analysis, and SIEM integration.
Fully Managed HSMs
Managed HSMs provide a high security protection mechanism for keys.
HSM Certification and Compliance
KMS provides HSMs that have passed FIPS 140-2 Level 3 validation, running under FIPS-approved Level 3 mode of operation, or offers HSMs that have passed relevant validation to comply with local regulatory requirements.
Secure Generation of Keys
Managed HSMs use a secure and licensed random number generation algorithm. The algorithm uses high entropy seeds to generate key materials. This protects keys from being recovered or anticipated by malicious parties.
Hardware Protection of Keys
Managed HSMs protect keys in KMS through hardware mechanisms. The plaintext of keys is only processed inside HSMs for key operations. It is kept within the hardware security boundary of HSMs.
Integration with Other Alibaba Cloud Services
KMS can be integrated with multiple Alibaba Cloud services to provide native encryption experience and advanced security capabilities.
Entry-level Default Encryption
KMS allows each cloud service to automatically manage a dedicated encryption key. By default, cloud services can use this key without caring about its lifecycle and authorization policies.
Optional Sources for Encryption Keys
You can create keys in KMS or import external key materials, and authorize cloud services to employ user-managed keys for data encryption protection. Therefore, you obtain full control over keys by managing their permissions and lifecycle.
Auditing Key Usage by Cloud Services
Regardless of service-managed keys or user-managed keys, you can audit key usage by cloud services by calling KMS API operations on your behalf.
Simple and Effective Cryptographic Operations
KMS uses abstract cryptographic concepts and provides simple cryptographic operation APIs.
Envelope Encryption
With envelope encryption built in KMS, you can generate a secondary key and encrypt the CMK through a single API call.
AEAD
KMS encapsulates authenticated encryption with associated data (AEAD). You can use encryption context to provide additional integrity and authenticity for encrypted data.
Digital Signature Verification
KMS can host asymmetric keys and provide digital signature verification algorithms based on asymmetric keys. KMS can be used in a wide range of scenarios such as identity verification, code signature, and blockchain.
Scenarios
CMK Encryption Configuration
DevSecOps Best Practices for Cloud Application Deployment
Applications deployed in services such as ECS, Container Service, and Function Compute involve sensitive data such as passwords, OAuth secrets, and server certificate keys. KMS encrypts data before deployment and decrypts data after deployment or during use to ensure the security of sensitive data during operations, maintenance, transfer, and storage.
Benefits
Prevent DevOps from Accessing Sensitive Data
The O&M system only provides R&D personnel with ciphertext of sensitive data required in the cloud production environment. R&D personnel package the ciphertext into a profile or use the ciphertext as an environment variable for Function Compute to control data leak risks.
High-performance and Scalable Envelope Encryption
Two-level Key Structure Supports a Large Amount of Data and High Concurrency
Benefits
With envelope encryption, KMS produces a two-level key structure: CMKs encrypt data keys (DKs). Cryptographic libraries of applications such as JCE and OpenSSL use DKs to encrypt local business data. The ciphertext of DKs is stored together with the encrypted business data. In the decryption stage, the ciphertext of DKs is decrypted first. The plaintext of DKs is used to decrypt business data locally after the plaintext is obtained.
Encrypt and Store Large Amounts of Data with OSS
You can use the encryption SDK of the OSS client to encrypt a large amount of data before uploading data. You can also call KMS to perform envelope encryption.
High-concurrency Reads/Writes of Encrypted Data with NoSQL
The same DK is used to encrypt data in a specified spatial or time range (such as in a table or every 5 seconds). DK plaintext is cached in the memory and DK ciphertext is stored in the NoSQL storage.
Build a Secure and Trusted Computing Environment
KMS Works with ECS Bare Metal Instances to Build a Secure Computing Environment
ECS Bare Metal Instance provides secure physical isolation and supports a chip-level trusted execution environment (Intel® SGX). You can build a secure computing environment to transfer DKs between KMS and other services through envelope encryption. Such DKs are used in the secure computing environment to encrypt the sensitive business data that exits the boundary and decrypt the ciphertext data that enters the boundary.
Benefits
Keeping Sensitive Data within a Secure Environment
The plaintext of sensitive business data is kept within the secure environment. Before data is stored in persistent storage, it is encrypted by KMS. In the encryption stage, no sensitive business data is transmitted to KMS.
Keeping DKs within a Secure Environment
DKs obtained from KMS are kept within the secure computing environment and used for encryption and decryption of persistent data that enters and exits the boundary of the environment. The ciphertext of the data key can be transmitted out of the secure environment and stored persistently together with encrypted business data.
Server Side Encryption
KMS encryption is integrated at the server side and you only need to configure keys and permissions.
When KMS is integrated with other cloud services, you can use CMKs in KMS to encrypt and protect data in other cloud services. You only need to specify the CMKs in the encryption configuration of other cloud services. The permissions on CMKs are defined through RAM and KMS calls by other cloud services are audited in ActionTrail.
Benefits
Managing Risks with Encryption for Distributed Computing and Storage Environment
A distributed and multi-tenant computing and storage environment is used on the cloud. The encryption feature of cloud services combines computing and storage behaviors with KMS. For example, you need to decrypt encrypted cloud disks before starting an ECS instance. KMS protects multiple redundant copies of encrypted cloud disks in the distributed storage system and snapshots automatically generated from encrypted cloud disks.
Hassle-free Encryption for Large Amount of Data
Encrypting and decrypting a large amount of data consumes a large amount of computing resources, which negatively affects the system performance and throughput. Alibaba Cloud provides server side encryption for cloud services, which helps you manage encryption while allowing you to maintain control and visibility of data encryption behaviors.
Billing Items
| KMS Editions | Protection Level | Fees (Per Key Version) | API Fees (Per 10K Requests） |
| Cloud service managed keys | Software | Free | Free monthly request quota: 20K Above quota: China Mainland: 0.08 USD Overseas: 0.03 USD |
|---|---|---|---|
| Customer managed keys -- Basic | Software | 0.06 USD/per month | China Mainland: 0.08 USD Overseas: 0.03 USD |
| Customer managed keys -- Basic | HSM | 1.00 USD/per month | China Mainland: 0.08 USD Overseas: 0.03 USD |
| Customer managed keys -- Advanced | Software | 0.06 USD/per month | China Mainland: 0.24 USD Overseas: 0.15 USD |
| Customer managed keys -- Advanced | HSM | 1-2000: 2.50 USD/per month 2000+: 1.00 USD/per month |
China Mainland: 0.24 USD Overseas: 0.15 USD |
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