diff --git a/l10n/messages.pot b/l10n/messages.pot
index 685520ecd..d4f84560c 100644
--- a/l10n/messages.pot
+++ b/l10n/messages.pot
@@ -14,6 +14,9 @@ msgstr ""
 msgid "All files"
 msgstr ""
 
+msgid "Cancel"
+msgstr ""
+
 msgid "Choose"
 msgstr ""
 
@@ -46,6 +49,12 @@ msgstr ""
 msgid "Current view selector"
 msgstr ""
 
+msgid "Enter your name"
+msgstr ""
+
+msgid "Failed to set nickname."
+msgstr ""
+
 msgid "Favorites"
 msgstr ""
 
@@ -61,6 +70,9 @@ msgstr ""
 msgid "Folder name cannot be empty."
 msgstr ""
 
+msgid "Guest identification"
+msgstr ""
+
 msgid "Home"
 msgstr ""
 
@@ -94,6 +106,9 @@ msgstr ""
 msgid "No matching files"
 msgstr ""
 
+msgid "Please enter a name with at least 2 characters."
+msgstr ""
+
 msgid "Recent"
 msgstr ""
 
@@ -109,8 +124,17 @@ msgstr ""
 msgid "Size"
 msgstr ""
 
+msgid "Submit name"
+msgstr ""
+
 msgid "Undo"
 msgstr ""
 
 msgid "Upload some content or sync with your devices!"
 msgstr ""
+
+msgid "You are currently not identified."
+msgstr ""
+
+msgid "You cannot leave the name empty."
+msgstr ""
diff --git a/lib/components/PublicAuthPrompt.vue b/lib/components/PublicAuthPrompt.vue
new file mode 100644
index 000000000..1d3ee5748
--- /dev/null
+++ b/lib/components/PublicAuthPrompt.vue
@@ -0,0 +1,223 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
+<template>
+	<NcDialog :buttons="dialogButtons"
+		class="public-auth-prompt"
+		data-cy-public-auth-prompt-dialog
+		is-form
+		no-close
+		:name="title"
+		@submit="onSubmit">
+		<p v-if="text" class="public-auth-prompt__text">
+			{{ text }}
+		</p>
+
+		<!-- Header -->
+		<NcNoteCard class="public-auth-prompt__header"
+			:text="notice"
+			type="info" />
+
+		<!-- Form -->
+		<NcTextField ref="input"
+			class="public-auth-prompt__input"
+			data-cy-public-auth-prompt-dialog-name
+			:label="t('Name')"
+			:placeholder="t('Enter your name')"
+			:required="!cancellable"
+			v-model="name"
+			minlength="2"
+			name="name" />
+	</NcDialog>
+</template>
+
+<script lang="ts">
+import { defineComponent } from 'vue'
+import { getBuilder } from '@nextcloud/browser-storage'
+import { setGuestNickname } from '@nextcloud/auth'
+import { showError } from '@nextcloud/dialogs'
+
+import NcButton from '@nextcloud/vue/components/NcButton'
+import NcDialog from '@nextcloud/vue/components/NcDialog'
+import NcNoteCard from '@nextcloud/vue/components/NcNoteCard'
+import NcTextField from '@nextcloud/vue/components/NcTextField'
+
+import { t } from '../utils/l10n.ts'
+
+const storage = getBuilder('public').build()
+
+export default defineComponent({
+	name: 'PublicAuthPrompt',
+
+	components: {
+		NcDialog,
+		NcNoteCard,
+		NcTextField,
+	},
+
+	props: {
+		/**
+		 * Preselected nickname
+		 * @default '' No name preselected by default
+		 */
+		nickname: {
+			type: String,
+			default: '',
+		},
+
+		/**
+		 * Dialog title
+		 */
+		title: {
+			type: String,
+			default: t('Guest identification'),
+		},
+
+		/**
+		 * Dialog text under the dialog title
+		 * e.g 'Enter your name to access the file'
+		 * @default '' Not shown by default
+		 */
+		 text: {
+			type: String,
+			default: '',
+		},
+
+		/**
+		 * Dialog notice
+		 * @default 'You are currently not identified.'
+		 */
+		notice: {
+			type: String,
+			default: t('You are currently not identified.'),
+		},
+
+		/**
+		 * Dialog submit button label
+		 * @default 'Submit name'
+		 */
+		submitLabel: {
+			type: String,
+			default: t('Submit name'),
+		},
+
+		/**
+		 * Whether the dialog is cancellable
+		 * @default false
+		 */
+		cancellable: {
+			type: Boolean,
+			default: false,
+		},
+	},
+
+	setup() {
+		return {
+			t,
+		}
+	},
+
+	emits: ['close'],
+
+	data() {
+		return {
+			name: '',
+		}
+	},
+
+	computed: {
+		dialogButtons() {
+			const cancelButton = {
+				label: t('Cancel'),
+				variant: 'tertiary',
+				callback: () => this.$emit('close'),
+			}
+
+			const submitButton = {
+				label: this.submitLabel,
+				type: 'submit',
+				variant: 'primary',
+			}
+
+			// If the dialog is cancellable, add a cancel button
+			if (this.cancellable) {
+				return [cancelButton, submitButton]
+			}
+
+			return [submitButton]
+		},
+	},
+
+	watch: {
+		/** Reset name to pre-selected nickname (e.g. Talk / Collabora ) */
+		nickname: {
+			handler() {
+				this.name = this.nickname
+			},
+			immediate: true,
+		},
+	},
+
+	methods: {
+		onSubmit() {
+			const input = this.$refs.input as HTMLInputElement
+			const nickname = this.name.trim()
+
+			if (nickname === '') {
+				// Show error if the nickname is empty
+				input.setCustomValidity(t('You cannot leave the name empty.'))
+				input.reportValidity()
+				input.focus()
+				return
+			}
+
+			if (nickname.length < 2) {
+				// Show error if the nickname is too short
+				input.setCustomValidity(t('Please enter a name with at least 2 characters.'))
+				input.reportValidity()
+				input.focus()
+				return
+			}
+
+			try {
+				// Set the nickname
+				setGuestNickname(nickname)
+			} catch (e) {
+				showError(t('Failed to set nickname.'))
+				console.error('Failed to set nickname', e)
+				input.focus()
+				return
+			}
+
+			// Set the dialog as shown
+			storage.setItem('public-auth-prompt-shown', 'true')
+
+			// Close the dialog
+			this.$emit('close', this.name)
+		},
+	},
+})
+</script>
+<style scoped lang="scss">
+.public-auth-prompt {
+	&__text {
+		// Smaller than dialog title
+		font-size: 1.25em;
+		margin-block: 0 calc(3 * var(--default-grid-baseline));
+	}
+
+	&__header {
+		margin-block: 0 calc(3 * var(--default-grid-baseline));
+		// No extra top margin for the first child
+		&:first-child {
+			margin-top: 0;
+		}
+	}
+
+	&__input {
+		margin-block: calc(4 * var(--default-grid-baseline)) calc(2 * var(--default-grid-baseline));
+	}
+}
+</style>
diff --git a/lib/index.ts b/lib/index.ts
index 9e6ed6d9a..86ed09b4f 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -47,3 +47,5 @@ export type {
 	IFilePickerButton,
 	IFilePickerFilter,
 } from './components/types.js'
+
+export { showGuestUserPrompt } from './public-auth.js'
diff --git a/lib/public-auth.ts b/lib/public-auth.ts
new file mode 100644
index 000000000..31c128d9a
--- /dev/null
+++ b/lib/public-auth.ts
@@ -0,0 +1,28 @@
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import type { ComponentProps } from 'vue-component-type-helpers'
+import { defineAsyncComponent } from 'vue'
+import { spawnDialog } from '@nextcloud/vue/functions/dialog'
+
+import type PublicAuthPrompt from './components/PublicAuthPrompt.vue'
+
+type PublicAuthPromptProps = ComponentProps<typeof PublicAuthPrompt>
+
+/**
+ * Show the public auth prompt dialog
+ * This is used to ask the current user their nickname
+ * as well as show some additional contextual information
+ * @param props The props to pass to the dialog, see PublicAuthPrompt.vue for details
+ */
+export function showGuestUserPrompt(props: PublicAuthPromptProps) {
+	return new Promise((resolve) => {
+		spawnDialog(
+			defineAsyncComponent(() => import('./components/PublicAuthPrompt.vue')),
+			props,
+			resolve,
+		)
+	})
+}
diff --git a/package-lock.json b/package-lock.json
index f36e5e13b..f3375e88c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
         "@mdi/js": "^7.4.47",
         "@nextcloud/auth": "^2.4.0",
         "@nextcloud/axios": "^2.5.1",
+        "@nextcloud/browser-storage": "^0.4.0",
         "@nextcloud/event-bus": "^3.3.2",
         "@nextcloud/files": "^3.10.2",
         "@nextcloud/initial-state": "^2.2.0",
@@ -51,6 +52,7 @@
         "typescript-plugin-css-modules": "^5.1.0",
         "vite": "^6.3.3",
         "vitest": "^3.0.3",
+        "vue-component-type-helpers": "^2.2.10",
         "vue-material-design-icons": "^5.3.1",
         "vue-template-compiler": "^2.7.16"
       },
@@ -1451,6 +1453,7 @@
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/@nextcloud/browser-storage/-/browser-storage-0.4.0.tgz",
       "integrity": "sha512-D6XxznxCYmJ3oBCC3p0JB6GZJ2RZ9dgbB1UqtTePXrIvHUMBAeF/YkiGKYxLAVZCZb+NSNZXgAYHm/3LnIUbDg==",
+      "license": "GPL-3.0-or-later",
       "dependencies": {
         "core-js": "3.37.0"
       },
@@ -13914,6 +13917,13 @@
         "tinycolor2": "^1.1.2"
       }
     },
+    "node_modules/vue-component-type-helpers": {
+      "version": "2.2.10",
+      "resolved": "https://registry.npmjs.org/vue-component-type-helpers/-/vue-component-type-helpers-2.2.10.tgz",
+      "integrity": "sha512-iDUO7uQK+Sab2tYuiP9D1oLujCWlhHELHMgV/cB13cuGbG4qwkLHvtfWb6FzvxrIOPDnU0oHsz2MlQjhYDeaHA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/vue-eslint-parser": {
       "version": "9.4.2",
       "resolved": "https://registry.npmjs.org/vue-eslint-parser/-/vue-eslint-parser-9.4.2.tgz",
diff --git a/package.json b/package.json
index 6d0dbb14f..9a8bdb86f 100644
--- a/package.json
+++ b/package.json
@@ -58,6 +58,7 @@
     "@mdi/js": "^7.4.47",
     "@nextcloud/auth": "^2.4.0",
     "@nextcloud/axios": "^2.5.1",
+    "@nextcloud/browser-storage": "^0.4.0",
     "@nextcloud/event-bus": "^3.3.2",
     "@nextcloud/files": "^3.10.2",
     "@nextcloud/initial-state": "^2.2.0",
@@ -97,6 +98,7 @@
     "typescript-plugin-css-modules": "^5.1.0",
     "vite": "^6.3.3",
     "vitest": "^3.0.3",
+    "vue-component-type-helpers": "^2.2.10",
     "vue-material-design-icons": "^5.3.1",
     "vue-template-compiler": "^2.7.16"
   },