Maintaining Your Signing identities and certificates maintain your signature identity and certificate

Code signing your app lets users trust that your app have been created by a source known to Apple and that it hasn ' t been t Ampered with. All apps must is code signed and provisioned to launch on a device, to use certain services, to is distributed for testing , or to is uploaded to ITunes Connect. Code signing uses cryptographic technology to digitally sign your apps and installer package. You create signing identities-stored in your Keychain-and certificates-stored in your developer account-to sign and Provis Ion your app. These assets uniquely identify you or your team, so it's important to keep them safe. This chapter covers common tasks the perform to protect and maintain your signing identities and certificates over th e Lifetime of your project.

Sign your app and let the user trust it from Apple and not be tampered with. All apps must be signed by code and can be started on the device, use a specific device, or do a distribution test, or upload to itunes Connect. Code signing uses encryption technology to automatically sign your app and install a new package. You create the identity of the signature-stored in the keychain-and a certificate-saved in your developer account-to sign and launch your app. This information is used to uniquely identify you or your team, so it's important to keep it safe. This chapter covers common tasks that you can go to protect and hold your signature logo and certificates within the cycle of your project.

About Signing identities and certificates on signing identities and certificates

Code Signing your app allows the operating system to identify who signed your apps and to verify that your app hasn ' t been Modified since you signed it. Your app ' s executable code is protected by it signature because the signature becomes invalid if any of the executable co De in the app bundle changes. Note that resources such as images and nib files aren ' t signed; Therefore, a change to these files doesn ' t invalidate the signature.

Code signing your app can allow the operating system to identify who has signed your app and identify if your app has been changed since you signed it. Your app executable code is protected by its signature, because the signature is unique when the executable code inside the app bundle changes. In particular, the resources are not signed with the slice and nib files, so the signatures will not be unique if changes are made to these files.

Code signing is used in combination with your App ID, provisioning profiles, and entitlements to ensure that:

• Your app is built and signed by you or a trusted team member.

• Apps signed by your or your team run only on designated development devices.

• Apps run only on the test devices you specify.

• Your app is ' t using App services you didn ' t add to Your app.

• Only can upload builds of the Your app to ITunes Connect.

• If you choose to distribute outside of the "the Store" (Mac only), the app can ' t is modified and distributed by someone else.

Code signing is and your AppID, signed file, has the right to guarantee the following:

• Your app is compiled and signed by you or a team member you trust;
• Apps that have been signed by you or your team can only run on the specified development device;
• Apps can only run on test devices, like you said;
• Your app can't use the services you didn't add to the app;
• Only you can upload the build version of your app at itunes Connect;
• If you choose to distribute your app in an unexpected place on the store, the app cannot be modified and distributed by other people.

Code signing also allows your app ' s signature to is removed and re-signed by a trusted source. For example, the your app before uploading it to ITunes Connect, but Apple re-signs it before distributing it to Cust Omers. Also, you can re-sign and submit a fully tested development build of your apps to the store.

Code signing also allows your app's signature to be modified and re-signed by other trusted sources. For example: You signed the app before uploading to itunes Connect, but Apple will re-sign it when it's distributed to other customers. And, you can re-sign and submit a fully tested development version of the app to the store.

Xcode uses your signing identity to sign your app during the build process. This signing identity consists of a public-private key pair that Apple issues. The Public-private key pair is stored in your keychain, and used by cryptographic functions to generate the signature. The certificate stored in your developer account contains just the public key. An intermediate certificate was also required to being in your keychain to ensure that your certificate was issued by A Certificate Authority.

Xcode uses your signature identity to sign your app during the compile phase. This signature identity includes the public key and the private key provided by Apple. This pair of public and private keys are stored in your keychain and are encrypted to generate signatures. The certificate in your development full account contains only the public key. An intermediate certificate also needs to be inside your keychain to ensure that your certificate is issued by a certificate authority.

Signing requires the both the Signing identity and the intermediate certificate installed in your keychain. When you install Xcode, Apple ' s intermediate certificates is added to your keychain for you. You use the Xcode to create your signing identity and sign your app. Your signing identity is added to Your keychain, and the corresponding certificate are added to Your developer account.

The signature requires you to have a signed identity and an intermediate certificate inside your keychain. When you install Xcode, Apple's intermediate certificate is also installed in your keychain. You can use Xcode to generate your signature identity and sign your app. Your signature is added to the keychain, and the corresponding certificate is added to your developer account.

Signing identities is used to sign your app or installer package. A development certificate  identifies, as a team member, in a development Provisioning profile This allows apps signed by the launch on devices. A distribution certificate  identifies your team or organization in a distribution Provisioning profile and allows your to submit your app to the store. Only a team agent or an admin can create a distribution certificate. You have the same development and distribution certificates for IOS, TvOS, and WatchOS apps. You use the different development and distribution certificates for MAC apps. For a complete list of certificate types, refer To your Signing certificates in DEPTH.

A signed identity is used to sign your app or install a package. A development certificate identifies you, as a team member, apps that allow you to sign in a development profile can be launched on the device. A distribution certificate identifies your team or organization in a distribution configuration certificate, which allows you to submit apps to hang yourself. Only the agent or manager of the team can generate a distribution certificate. You can develop iOS, TvOS, WatchOS Apps using the same development and distribution certificate. You need to use different development and release certificates for your Mac apps.

For the organization, other team members has their own signing identities installed on their MAC computers. The developer account contains a repository for all of the combined team assets but doesn ' t store any of the private keys.

For an organization, other team members have their own signing certificates installed on their computers. A developer account contains all the resource repositories for the team, but does not store any of their private keys.

Because the private key is stored locally on your Mac, and protect it as you would a account password. Keep a secure backup of your Public-private key pair. If the private key is lost, you'll have a entirely new identity to sign code. Worse, if someone else has your private key, then person May is able to impersonate. In the wrong hands, someone might attempt a app that distribute contains code. Not only could this cause the app to be rejected, it could also mean your developer credentials could is revoked by Apple. Private keys is stored only in the keychain and can ' t is retrieved if lost.

This is because the private key is stored locally on the computer, protecting it like saving the account password. Maintain a secure public and private key pair. If the private key is not found, you need to generate a new identity to complete the signature code. Worse, if someone else has your private key, that person can impersonate you. Worse, someone might try to distribute the code with rumors. This will not only cause your app to be rejected, but it will also mean that your development eligibility is revoked by Apple. Your private key can only be stored in the keychain, and if it is lost, it will no longer be retrieved.

If you want to code sign your apps using another Mac, you export your developer profiles on the Mac do used to create your Certificates and import it on the other Mac. You can also share distribution certificates among multiple team agents using this feature. (Team members should not share development certificates.)

If you want to sign your app with another Mac, you can export your development file on your original production certificate's Mac and bring it to your other Mac. You can share distribution certificates in multiple team proxies using this feature. (team members can not share the development certificate) (can only be administrator to export, just try not the administrator's account, not to come out)

Maintaining Your Signing identities and certificates maintain your signature identity and certificate