Vault can store your existing secrets, or it can dynamically generate new secrets to control access to third-party resources or provide time-limited credentials for your infrastructure. All data that Vault stores is encrypted. Any dynamically-generated secrets are associated with leases, and Vault will automatically revoke these secrets after the lease period ends. Access control policies provide strict control over who can access what secrets.<p>
Read More: Vault by HashiCorp
How do you you this with MSSql server you ask? Aha - Read this: MSSQL Secret Backend