Code signing is a macOS security technology that you use to certify that an app was created by you. Once an app is signed, the system can detect any change to the app—whether the change is introduced accidentally or by malicious code.
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You participate in code signing as a developer when you obtain a signing identity and apply your signature to apps that you ship. A certificate authority (often Apple) vouches for your signing identity.
Note: In most cases, you can rely on Xcode’s automatic code signing, which requires only that you specify a code signing identity in the build settings for your project. This document is for readers who must go beyond automatic code signing—perhaps to troubleshoot an unusual problem, or to incorporate the codesign(1)
tool into a build system.
Apps must follow an approved business model and clearly show you the price, tell you what you get with your purchase, and explain subscription-renewal terms up front. Apple sends a receipt each time you use our in‑app. Download iOS App Signer for Mac or Windows App Signer is an app that is used to combine different IPA files to get a combined file. This app is very beneficial when you are going to install multiple apps on your device. It will help you to install all the combined apps quickly.
Lighting Sign – Shandianqian iPhone/iPad app signer for iOS 9 – iOS 13.5 What is Lightning Sing? In simple terms, it is a computer-less iOS application signing tool. Through this tool, you can download or import IPA Files directly to the tool and sign and install it directly. Get Lightning Sign Premium Certificate If you.
Benefits of Code Signing
After installing a new version of a code-signed app, a user is not bothered with alerts asking again for permission to access the keychain or similar resources. As long as the new version uses the same digital signature, macOS can treat the new app exactly as it treated the previous one.
Other macOS security features, such as App Sandbox and parental controls, also depend on code signing. Specifically, code signing allows the operating system to:
Ensure that a piece of code has not been altered since it was signed. The system can detect even the smallest change, whether it was intentional (by a malicious attacker, for example) or accidental (as when a file gets corrupted). When a code signature is intact, the system can be sure the code is as the signer intended.
Identify code as coming from a specific source (a developer or signer). The code signature includes cryptographic information that unambiguously points to a particular author.
Determine whether code is trustworthy for a specific purpose. Among other things, a developer can use a code signature to state that an updated version of an app should be considered by the system to be the same app as the previous version.
Limitations of Code Signing
Code signing is one component of a complete security solution, working in concert with other technologies and techniques. It does not address every possible security issue. For example, code signing does not:
Guarantee that a piece of code is free of security vulnerabilities.
Guarantee that an app will not load unsafe or altered code—such as untrusted plug-ins—during execution.
Provide digital rights management (DRM) or copy protection technology. Code signing does not in any way hide or obscure the content of the signed code.
See Also
Read Security Overview to understand the place of code signing in the macOS security picture.
For descriptions of the command-line tools for performing code signing, see the codesign and csreq man pages.
Copyright © 2016 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2016-09-13
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