The Complete Guide to Secret Memos: How to Share Sensitive Text Safely

Have you ever sent a password through a messenger app like Slack or WhatsApp? Passwords left in chat histories are constantly exposed to risks like device loss, account hacking, and conversation leaks.

LOCK.PUB's Secret Memo feature solves this problem. Create a password-protected, one-time memo so that only the intended recipient can view the content.

How Does It Work?

The process is simple:

1. Write your memo -- Enter the text you want to share
2. Set a password -- Choose a password to protect the memo
3. Generate a link -- A unique short URL is created
4. Share the link -- Send the link and password to the recipient through separate channels
5. View the content -- The recipient enters the password to read the memo

flowchart TD
    A[Write a secret memo] --> B[Set a password]
    B --> C[Generate a link]
    C --> D[Send link via messenger]
    C --> E[Send password via text]
    D --> F[Recipient enters the password]
    E --> F
    F --> G[Memo viewed successfully]

The key is to send the link and password through different channels. This way, even if one channel is compromised, the content remains protected.

When to Use It

Password & Account Credentials

This is the most common use case. You can safely share passwords for shared accounts, Wi-Fi passwords, server access credentials, and more.

Memo content:
Server Access Info
- Host: 192.168.1.100
- ID: admin
- PW: Str0ng!Pass#2026
- Port: 22

Much safer than typing it directly into a chat.

Financial & Payment Information

Useful for sharing card numbers, bank account details, verification codes, and other financial information. Limit access to one view, and the memo expires automatically after being read.

Confidential Business Messages

Share sensitive work instructions, contract terms, job offer details, and other information that shouldn't be exposed externally.

Surprise Messages

Use the password as a hint for a fun surprise message. For example, set the password to "our-first-date" and let the recipient figure it out -- it adds a playful twist.

Tips for Extra Security

Access Limit (Pro)

With the Pro plan, you can set an access limit. Set it to 1, and the memo becomes inaccessible after the recipient views it once.

Expiration Time (Pro)

With the Pro plan, you can set an expiration time for your memo. After the specified period, the memo becomes automatically inaccessible.

Situation	Recommended Expiration
Urgent password sharing	1 hour
General account info	24 hours
Work document sharing	7 days

Send Password and Link Separately

This is the most important security principle:

• Send link via messenger, password via text message
• Send link via email, password via phone call
• Never send link and password in the same message

How Is This Different from Sending via Messenger?

	Direct Messenger	LOCK.PUB Secret Memo
Stays in chat history	Stored permanently	Only the link remains
Exposed if device is lost	At risk	Password required
Screenshot prevention	Not possible	Inaccessible without password
Auto-expiration	Not possible	Time/count limits (Pro)
Third-party access	Possible	Password required

Get Started Now

Secret Memo is free to use. Log in and create one right away.

Create a Secret Memo ->