diff --git a/messages/bundle_install.md b/messages/bundle_install.md
index 71321c49..20e65f40 100644
--- a/messages/bundle_install.md
+++ b/messages/bundle_install.md
@@ -40,6 +40,10 @@ Number of minutes to wait for the installation to complete.
 
 Display extended installation detail.
 
+# flags.installation-key.summary
+
+Installation key for key-protected bundle.
+
 # requestInProgress
 
 Installing bundle.
diff --git a/messages/bundle_version_create.md b/messages/bundle_version_create.md
index 933ca834..d1acee0d 100644
--- a/messages/bundle_version_create.md
+++ b/messages/bundle_version_create.md
@@ -40,6 +40,10 @@ Version number of the package bundle version to be created; overrides the sfdx-p
 
 Description of the package bundle version.
 
+# flags.installation-key.summary
+
+Installation key for key-protected bundle.
+
 # bundleVersionCreateWaitingStatus
 
 Waiting for bundle version creation to complete. %s minutes remaining. Current status: %s
diff --git a/src/commands/package/bundle/install.ts b/src/commands/package/bundle/install.ts
index 25d9296c..99088531 100644
--- a/src/commands/package/bundle/install.ts
+++ b/src/commands/package/bundle/install.ts
@@ -53,6 +53,10 @@ export class PackageBundlesInstall extends SfCommand<BundleSObjects.PkgBundleVer
       startsWith: '00D',
       required: true,
     }),
+    'installation-key': Flags.string({
+      char: 'k',
+      summary: messages.getMessage('flags.installation-key.summary'),
+    }),
     wait: Flags.integer({
       char: 'w',
       summary: messages.getMessage('flags.wait.summary'),
@@ -75,6 +79,7 @@ export class PackageBundlesInstall extends SfCommand<BundleSObjects.PkgBundleVer
       project: this.project!,
       PackageBundleVersion: flags.bundle,
       DevelopmentOrganization: flags['dev-hub-org'],
+      InstallationKey: flags['installation-key'],
     };
 
     // Set up lifecycle events for progress tracking
diff --git a/src/commands/package/bundle/version/create.ts b/src/commands/package/bundle/version/create.ts
index b4da602a..e90b2779 100644
--- a/src/commands/package/bundle/version/create.ts
+++ b/src/commands/package/bundle/version/create.ts
@@ -53,6 +53,10 @@ export class PackageBundlesCreate extends SfCommand<BundleSObjects.PackageBundle
       summary: messages.getMessage('flags.definition-file.summary'),
       required: true,
     }),
+    'installation-key': Flags.string({
+      char: 'k',
+      summary: messages.getMessage('flags.installation-key.summary'),
+    }),
     'target-dev-hub': requiredHubFlag,
     'api-version': orgApiVersionFlagWithDeprecations,
     wait: Flags.integer({
@@ -91,6 +95,7 @@ export class PackageBundlesCreate extends SfCommand<BundleSObjects.PackageBundle
       MajorVersion: majorVersion,
       MinorVersion: minorVersion,
       Ancestor: '',
+      InstallationKey: flags['installation-key'],
     };
 
     Lifecycle.getInstance().on(
diff --git a/test/commands/bundle/bundleInstall.test.ts b/test/commands/bundle/bundleInstall.test.ts
index f0b615d1..a2d6fb3d 100644
--- a/test/commands/bundle/bundleInstall.test.ts
+++ b/test/commands/bundle/bundleInstall.test.ts
@@ -163,6 +163,33 @@ describe('package:bundle:install - tests', () => {
       expect(logStub.args[0]).to.deep.equal(['Successfully installed bundle version 1Q83i000000fxw1AAA to test@org.org']);
     });
 
+    it('should install a package bundle version with installation key', async () => {
+      installStub = $$.SANDBOX.stub(PackageBundleInstall, 'installBundle');
+      installStub.resolves(pkgBundleInstallSuccessResult);
+
+      const cmd = new PackageBundlesInstall(
+        ['-b', 'TestBundle@1.0', '--target-org', 'test@org.org', '--dev-hub-org', '00D3i000000TNHYCA4', '-k', 'mySecretKey123'],
+        config
+      );
+      stubSpinner(cmd);
+      const res = await cmd.run();
+      expect(res).to.deep.equal({
+        Id: '08c3i000000fylgAAA',
+        InstallStatus: 'Success',
+        PackageBundleVersionId: '1Q83i000000fxw1AAA',
+        DevelopmentOrganization: '00D3i000000TNHYCA4',
+        ValidationError: '',
+        CreatedDate: '2022-11-03 09:46',
+        CreatedById: '0053i000001ZIyGAAW',
+        Error: [],
+      });
+      expect(warnStub.callCount).to.equal(0);
+      expect(logStub.callCount).to.equal(1);
+      expect(logStub.args[0]).to.deep.equal(['Successfully installed bundle version 1Q83i000000fxw1AAA to test@org.org']);
+      // Verify that the installBundle function was called with the installation key
+      expect(installStub.firstCall.args[2]).to.have.property('InstallationKey', 'mySecretKey123');
+    });
+
     it('should handle queued status', async () => {
       installStub = $$.SANDBOX.stub(PackageBundleInstall, 'installBundle');
       installStub.resolves(pkgBundleInstallQueuedResult);
diff --git a/test/commands/bundle/packageBundleVersionCreate.test.ts b/test/commands/bundle/packageBundleVersionCreate.test.ts
index c60b6c1a..8d7b99a1 100644
--- a/test/commands/bundle/packageBundleVersionCreate.test.ts
+++ b/test/commands/bundle/packageBundleVersionCreate.test.ts
@@ -186,6 +186,37 @@ describe('package:bundle:version:create - tests', () => {
       expect(logStub.args[0]).to.deep.equal(['Successfully created bundle version with ID 05i3i000000fxw1AAA']);
     });
 
+    it('should create a new package bundle version with installation key', async () => {
+      createStub = $$.SANDBOX.stub(PackageBundleVersion, 'create');
+      createStub.resolves(pkgBundleVersionCreateSuccessResult);
+
+      const cmd = new PackageBundlesCreate(
+        ['-b', 'TestBundle', '-p', 'path/to/definition.json', '-k', 'mySecretKey123', '--target-dev-hub', 'test@hub.org'],
+        config
+      );
+      stubSpinner(cmd);
+      const res = await cmd.run();
+      expect(res).to.deep.equal({
+        Id: '08c3i000000fylgAAA',
+        RequestStatus: 'Success',
+        PackageBundleId: '0Ho3i000000TNHYCA4',
+        PackageBundleVersionId: '05i3i000000fxw1AAA',
+        VersionName: 'TestBundle@1.0',
+        MajorVersion: '1',
+        MinorVersion: '0',
+        BundleVersionComponents: '[{"packageId": "0Ho3i000000TNHYCA4", "versionNumber": "1.0.0"}]',
+        Error: [],
+        CreatedDate: '2022-11-03 09:46',
+        CreatedById: '0053i000001ZIyGAAW',
+        Ancestor: null,
+      });
+      expect(warnStub.callCount).to.equal(0);
+      expect(logStub.callCount).to.equal(1);
+      expect(logStub.args[0]).to.deep.equal(['Successfully created bundle version with ID 05i3i000000fxw1AAA']);
+      // Verify that the create function was called with the installation key
+      expect(createStub.firstCall.args[0]).to.have.property('InstallationKey', 'mySecretKey123');
+    });
+
     it('should handle queued status', async () => {
       createStub = $$.SANDBOX.stub(PackageBundleVersion, 'create');
       createStub.resolves(pkgBundleVersionCreateQueuedResult);