---
title: 行事曆同步
icon: material/calendar
description: 行事曆包含一些您最敏感的資料，使用實現靜態加密的產品。
cover: calendar.webp
---

<small>防護下列威脅：</small>

- [:material-bug-outline: 被動攻擊](basics/common-threats.md#security-and-privacy ""){.pg-orange}
- [:material-server-network: 服務提供商](basics/common-threats.md#privacy-from-service-providers ""){.pg-teal}

**Calendars** contain some of your most sensitive data; use products that implement end-to-end encryption at rest to prevent a provider from reading them.

## Tuta

<div class="admonition recommendation" markdown>

![Tuta logo](assets/img/email/tuta.svg#only-light){ align=right }
![Tuta logo](assets/img/email/tuta-dark.svg#only-dark){ align=right }

**Tutanota** 在其支援的平臺上提供免費和加密的日曆。 Features include automatic E2EE of all data, sharing features, import/export functionality, multifactor authentication, and [more](https://tuta.com/calendar-app-comparison).

Multiple calendars and extended sharing functionality are limited to paid subscribers.

[:octicons-home-16: Homepage](https://tuta.com/calendar){ .md-button .md-button--primary }
[:octicons-eye-16:](https://tuta.com/privacy){ .card-link title="Privacy Policy" }
[:octicons-info-16:](https://tuta.com/support){ .card-link title="Documentation" }
[:octicons-code-16:](https://github.com/tutao/tutanota){ .card-link title="Source Code" }
[:octicons-heart-16:](https://tuta.com/community#donate){ .card-link title="Contribute" }

<details class="downloads" markdown>
<summary>Downloads</summary>

- [:simple-googleplay: Google Play](https://play.google.com/store/apps/details?id=de.tutao.calendar)
- [:simple-appstore: App Store](https://apps.apple.com/app/id6657977811)
- [:simple-github: GitHub](https://github.com/tutao/tutanota/releases?q=Calendar)
- [:fontawesome-brands-windows: Windows](https://tuta.com/blog/desktop-clients)
- [:simple-apple: macOS](https://tuta.com/blog/desktop-clients)
- [:simple-linux: Linux](https://tuta.com/blog/desktop-clients)
- [:simple-flathub: Flathub](https://flathub.org/apps/com.tutanota.Tutanota)
- [:octicons-browser-16: Web](https://app.tuta.com)

</details>

</div>

## Proton Calendar

<div class="admonition recommendation" markdown>

![Proton](assets/img/calendar/proton-calendar.svg){ align=right }

**Proton Calendar** is an encrypted calendar service available to Proton members via its web or mobile clients. Features include automatic E2EE of all data, sharing features, import/export functionality, and [more](https://proton.me/support/proton-calendar-guide).

Those on the free tier have access to 3 calendars, whereas paid subscribers can create up to 25 calendars. 擴展共享功能也僅限於付費訂閱者。

[:octicons-home-16: Homepage](https://proton.me/calendar){ .md-button .md-button--primary }
[:octicons-eye-16:](https://proton.me/calendar/privacy-policy){ .card-link title="Privacy Policy" }
[:octicons-info-16:](https://proton.me/support/calendar){ .card-link title="Documentation" }
[:octicons-code-16:](https://github.com/orgs/ProtonMail/repositories?q=calendar){ .card-link title="Source Code" }

<details class="downloads" markdown>
<summary>下載</summary>

- [:simple-googleplay: Google Play](https://play.google.com/store/apps/details?id=me.proton.android.calendar)
- [:simple-appstore: App Store](https://apps.apple.com/app/id1514709943)
- [:octicons-browser-16: 網頁版](https://calendar.proton.me)

</details>

</div>

In 2021, Securitum [audited](https://proton.me/community/open-source#:~:text=Proton%20Calendar) Proton Calendar's web client and provided a [letter of attestation](https://res.cloudinary.com/dbulfrlrz/images/v1714639870/wp-pme/letter-of-attestation-proton-calendar-20211109_3138998f9b/letter-of-attestation-proton-calendar-20211109_3138998f9b.pdf) for the Android app.

## 標準

**請注意，我們與推薦的任何項目均無關。**除了[我們的通用標準](about/criteria.md)外，我們還制定了一套明確的要求，以便我們能夠提供客觀的建議。 我們建議您在選擇使用項目之前先熟悉此列表，並進行自己的研究，以確保它是您的正確選擇。

### 最低合格

- 同步與儲存資訊必須使用 E2EE，以確保服務供應商無法看到。

### 最佳情況

最佳情況標準代表我們希望在這個類別的完美項目的應具備的特性。 推薦產品可能沒有此功能，但若有這些功能則會讓排名更為提高。

- 如果合適，最好能整合入原生作業系統行事曆和聯絡人管理應用程式。
