This guide explains how to use kPaste, the free tool offered by Infomaniak to share sensitive data securely, encrypted, and ephemeral.

Preamble

• kPaste is a free web application developed by Infomaniak, which allows you to share sensitive information (password, code, credentials...) in an ultra-secure and temporary manner.
• The data is encrypted directly in your browser, even before leaving your computer, thanks to AES-256-GCM encryption.
• Infomaniak cannot access the content of your messages: they remain in "zero-knowledge", with the decryption key being part of the link and never stored.
• The source code is open (open-source), which reinforces the transparency of the tool.
• The servers are exclusively in Switzerland, managed by Infomaniak.

Using kPaste to share sensitive data

To do this:

1. Access kpaste.infomaniak.com.
2. Write your message in the provided field (for example, a password, a code, an identifier...).
3. Choose the availability duration of the message (5 minutes to 1 month).
4. Enable the "delete after first read" option ("burn after read") if you want the message to disappear automatically after opening.
5. (Optional) Protect the message with a password, to be transmitted separately (or agreed upon in advance orally, for example).
6. Click on "Generate share link".
7. Copy the generated link and send it to the recipient via a secure channel (SMS, encrypted messaging, etc.).
8. As soon as the person opens the link, the message is accessible — and, if the option is enabled, it is deleted immediately after reading.

Example

You want to send a Wi-Fi password to a friend without risking it being visible for too long:

1. Open kpaste.infomaniak.com.
2. Type: WiFiPassword1234 in the field.
3. Select a short duration, for example 10 minutes.
4. Check "delete after first read".
5. (Optional) Add a password: AMIsecure.
6. Click on "Generate link".
7. You get a link of type https://kpaste.infomaniak.com/?<token>#<key> so here: https://kpaste.infomaniak.com/6bE4DzplVoghTQgoLaVH6NXfCi12D3bm#8kRmx51rf7msVzmNg7uPu4peJPboVhxuRvJee7EekLg6
8. Send this link via SMS to your friend, and communicate the password separately if there is one.
9. As soon as he clicks, he sees the password, and the message is destroyed immediately after reading.

Result: your password is accessible only once, for only 10 minutes, and Infomaniak has no way to view it.

Is kPaste really free?

Yes. Infomaniak finances its activities with its paid services. If you wish to help promote a Web that respects user privacy, tell your contacts about Infomaniak's free services.