"All rights reserved" is a copyright notice that indicates the creator or owner of a work retains all rights granted by copyright law12. This phrase serves as a clear statement that the copyright holder has not waived any of their exclusive rights, which typically include the right to reproduce, distribute, perform, display, and create derivative works13.

Key points about "all rights reserved":

1. Legal significance: While not legally required in most countries today, the phrase still serves as a warning to potential users that the work is protected by copyright24.

2. Origin: The phrase originated from the Buenos Aires Convention of 1910, which required a statement of rights reservation for copyright protection in signatory countries2.

3. Usage: It's commonly seen on various creative works, including books, photographs, websites, and other intellectual property15.

4. Implied protection: Even if a work doesn't explicitly state "all rights reserved," copyright law generally protects original works automatically upon creation6.

5. Alternative approaches: Some creators opt for more permissive licensing options, such as Creative Commons licenses, which allow for specific uses of their work under certain conditions1.

While "all rights reserved" is not mandatory for copyright protection, many creators continue to use it as a clear indication of their intention to retain full control over their intellectual property46. It's important to note that using copyrighted material without permission may lead to legal consequences, regardless of whether the phrase is explicitly stated5.