Edaqa's Secret Sharing

A secret sharing tool by by Edaqa Mortoray

Use this tool to allow friends, colleagues, and loved ones, gain access to your systems in case of an emergency. It allows you to break a secret into parts, and if enough recipients agree to combine their parts, the initial secret can be recovered.

Secret Message

This contains the secret information. It should only contain data that can be revocable or changed, such as passwords or keys to documents, applications, and websites.

Public Message

This message will *not* be encrypted, but added as a clear text header to the recipient instructions.

Who would like to share it with?

This list of people is not included in the message. You need to ensure they know how to find each other.

How many people are needed to decode?

This is the minimum number of people required who can combine their codes to restore the original secret.

Download the decoder (right-click "Save As"), attach it to the message you send to each recipient. This is important as a public decoder may not be available in the future.

Use the "Sent" checkbox to track who've you sent the code to. Be aware that you can't regenerate codes later. Pressing "Encode" again will generate an entirely new set of codes that must be sent to the recipients.

Only send messages on secure channels, such as Signal or encrypted email. Anybody who could intercept enough messages can recover the secret.

Security Features

This tool is standalone, using no additional resources, and making no network requests. It can be downloaded and used offline for added security. Be sure to download the decoder as well.

No reliance on third-parties. Recipients should be provided with the decoder, making the codes stable at the time they are generated.

The shared secrets are implement with Shamir's secret sharing algorithm. It is believed that no information about the secret is leaked until the quorom of recipients combines their codes.