How to Share a Password Securely

March 2026 · 4 min read

You need to send someone a password. Maybe a Wi-Fi password, an API key for a colleague, or a Netflix login for your partner. What do you do?

Most people text it. Or email it. Or put it in a Slack message. All of these are terrible ideas.

Why texting passwords is dangerous

Text messages are not encrypted

SMS is plain text. Your carrier can read it. Anyone who intercepts it can read it. And it lives on both phones forever.

Email sits in two inboxes

You send a password by email. Now it exists in your Sent folder, their Inbox, your email server, their email server, and every backup of both.

Slack and Teams messages are searchable

Every message in Slack is indexed. Search "password" in your workspace. You will be surprised what shows up.

The right way: self-destructing links

The only safe way to share a password is to make it disappear after it is read.

Lockbox Whisper encrypts your secret, creates a one-time link, and destroys it after the recipient views it. The recipient does not need an app or an account. They just click a link.

How Whisper works

1

Open Lockbox and tap Whisper

2

Type or paste the password you want to share

3

Optionally add a PIN for extra protection

4

Tap Create Whisper to get a link

5

Send the link via text, email, Slack, anything

6

They open it, see the password, and it self-destructs

How is the link secure if I send it over text?

Great question. The decryption key is in the URL fragment (the part after the # symbol). Per internet standards (RFC 3986), the fragment is never sent to the server. Our server only sees encrypted noise. The decryption happens entirely in the recipient's browser.

Even if someone intercepts the link, the whisper self-destructs after the first view. The interceptor would need to open it before the intended recipient does.

What about 1Password and Bitwarden?

Both have sharing features, but both require the recipient to have an account. If you are sharing a password with your mom, your contractor, or a client, asking them to sign up for a password manager just to receive one password is not realistic.

Lockbox Whisper requires nothing from the recipient. No app. No account. No sign-up. Just a browser.

$4.99

Share secrets safely. No account needed.

Whisper is included free. Unlimited self-destructing links.

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