Best AWS Key Management Service Alternatives & Competitors in 2026

Bunker Trusted Recovery is a reference architecture from Station70 for recovering encrypted backups through a quorum based, multi party approval process. It splits a backup encryption key across three independent security domains: a customer share held by a quorum of approvers, an operations HSM share, and a cloud KMS share. Recovery requires all three domains and a customer defined M of N approval policy before any decryption occurs. Approving members authenticate and decrypt their portion of the customer share in a browser using a FIDO2 YubiKey, producing key material that is wrapped so only Station70's trusted execution environment (a Nitro Enclave) can use it. A single tenant CloudHSM in a separate AWS account decrypts the HSM share, and the TEE uses AWS KMS to decrypt the cloud share. Inside the enclave, the three shares are combined with Lagrange interpolation to reconstruct the backup encryption key, which is then used to decrypt the stored backup package layer by layer. The recovered backup is re encrypted to the customer's designated recovery public key before leaving the enclave, so it never exists in plaintext outside the TEE. The architecture is designed so Station70 cannot initiate or complete a recovery unilaterally, client browser compromise cannot leak usable key material due to transport wrapping, and if an approval policy becomes unsatisfiable due to lost devices or departed members, the backup is deleted and re ingested rather than the security requirement being weakened. Key components include a recovery policy engine for configuring approval thresholds, a browser based decryption site for approvers, a single tenant operations HSM, a Nitro Enclave TEE that performs reconstruction and decryption, and a ciphertext manager that serves encrypted material to the TEE at recovery time.</description> <parameter name="summary">Quorum based, TEE enforced recovery architecture for decrypting encrypted backups across 3 domains

TrustedKeep is an object-level encryption and key management product designed for government agencies and defense organizations to protect sensitive data across cloud, on-premise, and hybrid environments. It applies encryption to data at rest, in transit, and in use, with keys managed outside of the cloud environment where the data resides. The product uses a key management system (TrustedKMS) that can scale to billions of keys and handle high transaction volumes, paired with TrustedGateway, a stateless, scalable component for distributed deployments. TrustedKeep enforces access control and separation of duties so that only authorized users and systems can access designated data, based on encryption-based policy decisions. It is designed to support data classifications ranging from unclassified, unencrypted data up to highly sensitive, encrypted data, applying consistent policies across data sets. The product includes an API compatible with Amazon S3, functioning as a transparent proxy for encrypted object storage, and supports compatibility with Amazon KMS Customer Managed Keys. It provides auditing and monitoring capabilities, logging every operation and exporting audit data to external systems such as an Elastic stack, with configurable notifications for object storage, retrieval, and deletion events. TrustedKeep is part of a broader Trusted product family from Two Six Technologies that includes TrustedHSM, TrustedSearch, TrustedView, TrustedEdge, and TrustedFlow, addressing related areas such as hardware root of trust, encrypted search, cross-domain visualization, edge data handling, and secure data movement. TrustedKeep encryption is FIPS 140-2 validated and has been accredited under ICD-503 requirements for use in national security systems.</description> <parameter name="summary">Object-level encryption and key management for protecting sensitive data across cloud and on-prem systems

Cloud-hosted HSM service for key management and cryptographic operations on Alibaba Cloud.

Managed cloud key management and cryptography service with HSM support on Alibaba Cloud.

Enterprise key management system for encryption key lifecycle management

Enterprise key management solution for centralized encryption key lifecycle mgmt

Private encryption key hosting solution for cloud collaboration platforms

Multi-cloud KMS for centralized BYOK encryption key management and rotation