Tag: security

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PostgreSQL to Microsoft Excel via Npgsql

by Florian Nadler | 02.2024
This article is dedicated to all the Excel heroes out there who want to integrate and use data stored in […]

PostgreSQL ALTER DEFAULT PRIVILEGES - permissions explained

by Laurenz Albe | 05.2023
  Many people have heard that ALTER DEFAULT PRIVILEGES makes it easy to allow other users access to tables. But […]

PostgreSQL ERROR: permission denied for schema public

by Hans-Jürgen Schönig | 11.2022
In PostgreSQL 15, a fundamental change took place which is relevant to every user who happens to work with permissions: […]

View permissions and row-level security in PostgreSQL

by Laurenz Albe | 06.2022
  The details of how view permissions are checked have long puzzled me. PostgreSQL v15 introduces “security invoker” views, which […]

PostgreSQL Security: 12 rules for database hardening

by Hans-Jürgen Schönig | 07.2021
UPDATED August 2023: Hardening PostgreSQL has become ever more important. Security is king these days and people want to know […]

From MD5 to scram-sha-256 in PostgreSQL

by Laurenz Albe | 06.2021
  Since v10, PostgreSQL has provided support for scram-sha-256 for password hashing and authentication. This article describes how you can […]

PostgreSQL: Get member roles and permissions

by Hans-Jürgen Schönig | 04.2021
PostgreSQL provides a highly sophisticated and powerful security and permission system. It allows you to define users (= roles), groups […]

Using “Row Level Security” to make large companies more secure

by Hans-Jürgen Schönig | 09.2019
Large companies and professional business have to make sure that data is kept secure. It is necessary to defend against […]

PostgreSQL Row Level Security, views and a lot of magic

by Hans-Jürgen Schönig | 08.2019
Row Level Security (RLS) is one of the key features in PostgreSQL. It can be used to dramatically improve security […]

Abusing SECURITY DEFINER functions in PostgreSQL

by Laurenz Albe | 05.2019
UPDATED August 2023: Functions defined as SECURITY DEFINER are a powerful, but dangerous tool in PostgreSQL. The documentation warns of […]
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