- As an independent news organization, Business Insider relies on sources to investigate powerful institutions.
- A source may be concerned with sending tips securely.
- We interviewed some of our top journalists to compile a list of options to share evidence as securely as possible.
As an independent news organization, Business Insider depends on sources to investigate important institutions. While we look for our sources to speak on the record, there are occasions when we may agree to keep a source anonymous; in such cases, the sources may also want to take additional steps to protect themselves. While all communication systems can have security gaps, below are some tips for sharing evidence more securely.
- In general, phone calls are more secure than emails or texts. The Signal app (see below) is better than a traditional phone call. In-person communication, such as a meeting at a coffee shop, is an even more secure option.
- Use a nonwork device connected to the internet via a nonwork WiFi connection.
- Consider using a friend's phone if you're concerned your employer is surveilling your devices.
- The best time and place to talk is outside work — on a lunch break, for instance.
Consider using the Signal messaging app. It provides end-to-end encryption, which keeps your communications private. The service is maintained by the nonprofit Signal Foundation. Read more about Signal's security features here. Download it here and be sure to keep it up to date. Many reporters use Signal and include their contact details at the bottom of their stories or on their bio pages on the site.
- You can talk over Signal's voice-calling feature, too. This is more secure than a traditional phone line.
- Consider using the WhatsApp messaging app. WhatsApp is another app that, like Signal, is end-to-end encrypted, which keeps your communications private. It is owned by Meta, which also owns Facebook. Many reporters use WhatsApp and include their contact details at the bottom of their stories or on their bio pages on the site.
- Don't add journalists' contact details to your digital address book.
- Business Insider also offers SecureDrop for sources who wish to share documents and other information anonymously. The underlying software is maintained by the Freedom of the Press Foundation and is audited by third-party security firms. To access this service, find a nonwork network and get online using a Tor-enabled web browser at the following address: http://nprzemxex6ecmc57iqt3nd6lgyjjmu57mcooga4tksdvjgwv5fvxwvid.onion/
- If technology is not your strong suit, have a trusted and more adept friend follow these instructions on your behalf. This is particularly applicable to SecureDrop, which requires a higher level of skill than most computer tasks.
- Be wary of which printer you use. Many printers embed a faint watermark that contains the device's serial number and the date and time of printing. Such information can be used to identify the person who printed the document. To avoid this, consider using a shared printer at an internet café or library, for example.
- If you have documents or other physical evidence, one of the most secure ways to share them is through in-person meetings.
- Physical mail is a relatively simple and secure method of contacting us anonymously. Prepare the letter while wearing gloves, use a self-sealing envelope and store-bought postage, and mail it at a blue USPS mailbox far away from your home and office. If you do not wish to be contacted, do not include a return address. Pay in cash. Addresses for our news bureaus are below:
New York
Business Insider
℅ Investigations
1 Liberty Plaza, Floor 8
New York, NY 10006
San Francisco
Business Insider
℅ Investigations
44 Montgomery St., Floor 3
San Francisco, CA 94104
London
Business Insider
2nd Floor, WeWork
145 City Road
London EC1V 1AZ
England
Editor's note: This information was most recently updated in February 2025.