# RDS for SQL Server

A fully managed, highly available SQL Server database service powered by AWS.

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## Cross-database access using module signing on Amazon RDS for SQL Server

DevFeed: [Cross-database access using module signing on Amazon RDS for SQL Server](<https://devfeed.tech/articles/cross-database-access-using-module-signing-on-amazon-rds-for-sql-server-4698.md>)

Original publisher: [Read original article](<https://aws.amazon.com/blogs/database/cross-database-access-using-module-signing-on-amazon-rds-for-sql-server/>)

Author: Nirupam Datta

Published: 2026-08-24T18:07:08Z

Content type: tutorial

Language: en

Sources: [AWS Database Blog](<https://devfeed.tech/sources/aws-database-blog.md>)

Topics: [Amazon RDS](<https://devfeed.tech/topics/amazon-rds.md>), [RDS for SQL Server](<https://devfeed.tech/topics/rds-for-sql-server.md>), [sql-server](<https://devfeed.tech/topics/sql-server.md>), [Security](<https://devfeed.tech/topics/security.md>), [Authorization](<https://devfeed.tech/topics/authorization.md>), [migration](<https://devfeed.tech/topics/migration.md>)

Tags: [advanced-300](<https://devfeed.tech/tags/advanced-300.md>), [amazon](<https://devfeed.tech/tags/amazon.md>), [amazon-rds](<https://devfeed.tech/tags/amazon-rds.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [microsoft](<https://devfeed.tech/tags/microsoft.md>), [migration](<https://devfeed.tech/tags/migration.md>), [post](<https://devfeed.tech/tags/post.md>), [rds-for-sql-server](<https://devfeed.tech/tags/rds-for-sql-server.md>), [security](<https://devfeed.tech/tags/security.md>), [sql](<https://devfeed.tech/tags/sql.md>), [technical-how-to](<https://devfeed.tech/tags/technical-how-to.md>)

### AI overview

This post explains how to enable secure cross-database access on fully managed Amazon RDS for SQL Server using certificate-based module signing. It presents module signing as an RDS-compatible alternative to TRUSTWORTHY, with permissions limited to specific stored procedures and aligned with least privilege.

### Source excerpt

If you need cross-database access on Amazon RDS for SQL Server but cannot enable TRUSTWORTHY, module signing with certificates is the secure, RDS-compatible alternative. This post shows how to grant cross-database permissions to specific stored procedures without TRUSTWORTHY and with a stronger, least-privilege security posture.