How to Share Passwords Securely with Teams and Family

About 9 min read

Sharing passwords with others is a common occurrence in daily life, whether sharing a streaming service account with family or passing business tool credentials to team members. However, improper sharing methods can lead to serious security risks. According to Verizon's 2024 Data Breach Investigations Report (DBIR), stolen credentials were involved in approximately 31% of breaches, and improper password sharing is a contributing factor to the spread of damage. Furthermore, a 2024 Ponemon Institute survey found that 69% of employees have shared passwords with colleagues. This article clarifies common dangerous sharing methods and their risks, and explains concrete measures for sharing passwords securely.

The Bottom Line - How to Choose a Sharing Method

The security of password sharing varies greatly depending on the tools and procedures used. Here is a summary of recommended methods by technical level.

• Beginners: Use the sharing feature of a password manager. Setup is easy, and encryption and permission management are handled automatically
• Intermediate: Use self-destructing sharing services (One-Time Secret, PrivateBin) that automatically delete content after a single view
• Advanced: Set up a self-hosted PrivateBin on your own server and share without going through third-party services

Regardless of the method, the golden rule is to change the password promptly after sharing and generate a new random password on passtsuku.com.

Why Sharing Passwords via Email or Messaging Apps Is Dangerous

Sending passwords via email or messaging apps is something many people do routinely, but it is extremely dangerous from a security perspective. The reason lies not only in the safety of the communication channel, but also in the persistence of messages and the difficulty of controlling their spread.

Message Persistence

Email and messaging app messages are stored on both the sender's and recipient's devices, as well as on servers. If a device is lost or an account is compromised, all passwords contained in past messages are at risk of exposure. Even if you think you deleted them, they may remain in backups or server-side logs. In practice, email server log retention periods vary by organization, but legal requirements may mandate storage for several years, during which passwords remain in plaintext.

Eavesdropping Risk on the Communication Path

Email may have unencrypted segments along its transmission path. The SMTP protocol was originally designed for plaintext communication, and encryption via STARTTLS depends on agreement between servers, so encryption is not guaranteed across all hops. According to Google's Transparency Report, approximately 10% of emails sent from Gmail pass through unencrypted paths. LINE supports end-to-end encryption, but chat history backups may not be encrypted, and the possibility of leakage via cloud storage cannot be ruled out.

Risk of Forwarding and Screenshots

Messages can be unintentionally forwarded by the recipient or saved as screenshots elsewhere. Controlling the spread of a password once sent is virtually impossible. It is important to note that even in internal chat tools (Slack or Teams), administrators can view message logs, so posting passwords in plaintext exposes them to everyone with admin privileges. Using social engineering techniques, attackers can target messages containing shared passwords to attempt account intrusion.

For risk management when sharing passwords, credential protection and secure sharing guides (Amazon) are also helpful.

Password Manager Sharing Features

Major password managers come with dedicated features for securely sharing passwords. Using these features provides the following benefits.

• End-to-end encryption prevents passwords from being exposed in plaintext during sharing
• You can specify sharing recipients, preventing unintended leakage to third parties
• Revoking the share immediately removes the recipient's access
• Password changes are automatically reflected for shared recipients
• Audit logs showing who accessed and when are available (on business plans)

Many services offer "Family Plans" for family sharing and "Business Plans" for team sharing, allowing you to choose the appropriate plan for your needs. A common misconception is that sharing features are available on free plans, but most services limit sharing to paid plans. Check the feature comparison for each plan before adoption.

How to Choose a Password Manager Sharing Feature

Sharing feature implementations vary by service. When selecting, check the following aspects: sharing granularity (vault-level or item-level), access permission granularity (view-only, editable, etc.), availability of audit logs, and security incident history. Open-source services have an advantage in code transparency and third-party verification. Cost-wise, family plans typically run $40-60 per year, while team plans cost $4-8 per user per month. Since sharing features are often restricted on free plans, check the feature comparison for each plan before adoption.

Methods for Temporary Password Sharing

If you need to temporarily share a password with someone who does not use a password manager, consider the following methods.

Self-Destructing Sharing Services

Services like One-Time Secret and PrivateBin generate encrypted links for passwords that are automatically deleted after a single view. You can set expiration times so links become invalid after a certain period even if unviewed. However, it is important to verify the reliability of these services beforehand. Entrusting passwords to services with unknown operators carries the risk of content being logged. As reliability criteria, check whether the code is open source, whether server-side encryption is implemented, and whether the operator's location and privacy policy are clear.

Split and Send via Different Channels

If you must share via messaging, you can split the password into halves and send them through different communication channels (for example, the first half by email and the second half by phone). This is not a perfect solution, but it is safer than sending the entire password through a single channel. This method is a simplified application of the concept of "secret sharing" explained in Encryption Basics.

Changing Passwords After Sharing

Once temporary sharing is complete, change the password promptly. Since the password's confidentiality is reduced the moment it is shared, the principle is to switch to a new password once the task is done. By generating a new random password on passtsuku.com, you eliminate any similarity to the previous password and remove the risk of guessing.

For safe procedures for temporary sharing, one-time password and secret exchange guides (Amazon) are also helpful.

Security Checklist for Password Sharing

Before sharing a password, verify safety with the following checklist. If even one answer is "no," we recommend reconsidering your sharing method.

• Does the recipient truly need this password? (Have you considered minimizing privileges?)
• Are you using a password manager's sharing feature?
• Is the password being shared not reused across other services?
• Do you have a plan to change the password after sharing?
• Is the sharing channel encrypted? (Not email or plaintext chat?)
• Does the recipient have a password manager installed on their device?
• Do you know the procedure to revoke access when sharing is no longer needed?

Generate Passwords for Sharing on passtsuku.com

When sharing passwords, we recommend using passtsuku.com to generate dedicated passwords. Key points for managing shared passwords are as follows.

• Generate a dedicated password for the shared service on passtsuku.com (do not reuse across other services)
• Use 16 or more characters including uppercase, lowercase, numbers, and symbols to ensure sufficient strength
• When sharing is no longer needed, regenerate a new password on passtsuku.com and change it immediately
• When sharing among multiple people, regenerate the password when members change

With the bulk generation feature on passtsuku.com, you can generate passwords for multiple services at once. Even with multiple shared accounts, you can efficiently prepare different random passwords for each service. The generation process is completed entirely within the browser, so there is no concern about passwords being transmitted externally.

Ideally, password sharing should be avoided whenever possible, but when necessary, choosing appropriate methods and minimizing the sharing period is fundamental to security. Generate strong passwords on passtsuku.com and combine them with secure sharing methods to minimize risk.

For organizations that need to manage password sharing at scale, a well-defined corporate password policy can establish clear rules around when and how credentials may be shared.

Actions You Can Take Now

1. Generate a random password of 16 or more characters on passtsuku.com and update the passwords of currently shared accounts
2. Adopt a password manager's sharing feature and stop sending passwords via email or messaging apps
3. Delete chat histories containing passwords sent via messages in the past, and change the passwords for those services
4. Review access rights for accounts where sharing is no longer needed and revoke unnecessary shares
5. Set up two-factor authentication for accounts shared with your team or family

Frequently Asked Questions

Is there a safe way to share passwords?

Using a password manager's sharing feature is the safest method. It provides end-to-end encryption and lets you easily revoke access when sharing is no longer needed.

Is it okay to send passwords via email or messaging apps?

Not recommended. Messages persist on servers and devices, and can be forwarded or screenshotted. If unavoidable, use a self-destructing sharing service like One-Time Secret.

What should I do after sharing a password?

Change the password promptly once the sharing purpose is fulfilled. Generate a new random password on passtsuku.com to ensure no similarity with the previous one.