Source Code

What matters in tech, in your inbox every morning.


Your inside guide to the future of enterprise computing.

From the Editor

Send a tip

The staff at Protocol understands that you may have access to information or documents that you wish to share with journalists in a secure manner.

We've set up several secure systems we hope will allow sources to share material with us. Remember: No communication system is impervious to attack or prying eyes, but these options can help protect your confidentiality and anonymity.


Reach us via Signal at 415-214-4715.

Signal is a free secure communications tool available as an app for Android and iPhone as well as for desktop computers. Its end-to-end encryption is considered the benchmark standard by privacy experts and recommended by none other than Edward Snowden; do you really need to know anything more?

To get started, download the app and set up an account. Signal doesn't store your communications, and you can use the app to send texts and files, as well as to make phone calls.


Reach us via WhatsApp at 415-214-4715.

Owned by Facebook, WhatsApp is a free messaging app that offers end-to-end encryption for voice calls and text messages. You can also share documents through WhatsApp. All messages are secured with a unique digital lock that only the sender and recipient — and not anybody in between, including WhatsApp or Facebook — have keys to. The service requires users to register with a mobile phone number, and it records the phone numbers and timestamps of message exchanges.


Reach us via Telegram at 415-214-4715.

Like WhatsApp, Telegram is a free messaging app that emphasizes security. The app's "secret chats" feature uses end-to-end encryption and allows users to order messages to self-destruct, meaning that they disappear after a set amount of time after they're opened. Secret chats aren't stored on the company's servers, and they can't be forwarded. When a user deletes a secret chat message, the app on the other side of the conversation is ordered to delete it as well.


This tool, which is managed by the Freedom of the Press Foundation, is a whistleblower submission system that's accessed through Tor. It enables you to send information and messages anonymously; we are not able to identify the origin of messages or documents.

Here's what to do:

  • Use a public Wi-Fi network.
  • Download and install the anonymous browser Tor.
  • Copy and paste this URL into the Tor browser: zv23wmqjzkr2mqwduohwj7clzsmm7ge4kjqdlu3qbh2gf7qxzgwierad.onion
  • You will see instructions for uploading files. After submitting material, you'll receive a username that you can re-enter later to check on the status of your submission. We may reply to your submission with follow-up questions.

Standard mail and email

You may also contact us at, or via snail mail at:

Protocol Media
615 Sacramento St., Second Floor
San Francisco, CA 94111

Protocol Media
333 W. 39th St., Suite 802
New York, NY 10018

If you wish to protect your identity, we recommend that you use a public mailbox to drop off your materials.

Latest Stories