How to create a strong, secure password

A weak password remains the number one way hackers get into a business. The good news: creating a strong password takes no technical skills and no budget. Here are the rules that actually matter, the step-by-step method to apply them, the one tool that changes everything, and the mistakes that undo all your efforts.

Most breaches don't rely on sophisticated techniques, but on passwords that are too simple or reused. For a small or mid-sized business, a single compromised account can be enough to expose your email, your accounting or your customer data. Security therefore starts with a basic habit: choosing strong passwords and managing them well. It's the cheapest and most cost-effective building block of your entire cybersecurity setup.

In this guide, we'll look concretely at how to build a password that's hard to crack, how to remember it without writing it on a sticky note, and how to protect all of your professional accounts. The goal: to let any manager or employee put this advice into practice in about an hour, with no complicated software.

What actually makes a password strong

A password's strength doesn't come from how complex it looks, but above all from its length and its unpredictability. A short password packed with special characters often cracks faster than a long, simple phrase. Automated attacks test an enormous number of combinations per second, so each additional character dramatically multiplies the time needed to guess your password.

• Length first: aim for at least 12 characters, ideally 16 or more for sensitive accounts.
• Character variety: mix uppercase, lowercase, numbers and symbols.
• No guessable logic: avoid dictionary words, first names, birth dates or company names.
• Uniqueness: a different password for every service, no exceptions.
• Unpredictability: the best password is one you'd be unable to memorize by heart.

Length or complexity: which should you prioritize?

Many companies still enforce rules like "one uppercase letter, one number, one symbol." The problem: these constraints push users to create predictable variations, such as "Company2026!", which a machine can easily guess. A longer string of words, on the other hand, offers a far larger space of combinations while remaining easier to type. Length is therefore your best ally.

The passphrase method

For the rare passwords you do have to memorize (your password manager's, your computer login), the passphrase is the best trade-off between security and memorability. The idea: string together several unrelated words, separated by symbols or numbers. The brain easily holds on to an absurd image, while it forgets a string of random characters.

1. 1Choose 4 to 5 unrelated words: for example lamp, shark, brick, orange.
2. 2Separate them with hyphens, numbers or symbols: Lamp-Shark7-Brick-Orange!
3. 3Add an unexpected capital letter in the middle of a word to strengthen the whole.
4. 4Avoid quotes, song lyrics or well-known expressions, which are easy to guess.
5. 5Picture a mental scene linking the words: it will serve as your memory aid.

An example for a small business

Take the case of a self-employed tradesperson who manages their own computer and email. They don't need to remember twenty passwords: they only need to memorize a single, very strong one to unlock their session and their password manager. A phrase like "Screwdriver-Cloud3-Basil-Bike" takes a few seconds to type, appears in no dictionary and holds up far better than a classic "Workshop2026". Everything else will be handled automatically, as we'll see below.

The password manager: the real solution

Remembering a unique, complex password for dozens of accounts is humanly impossible. That's why the password manager is now the essential tool for any organization, even the smallest one. It generates, stores and automatically fills in your credentials inside an encrypted vault, protected by a single master password.

In practice, you only have one passphrase to memorize: your password manager's. Everything else is generated randomly and stored securely. Well-established solutions like Bitwarden, 1Password or KeePass are a perfect fit for small and mid-sized businesses, with secure sharing options between team members. It's also a key building block to secure your website and your hosting access, which are often shared among several people.

• Automatic generation of long, unique passwords in one click.
• Auto-fill that also reduces the risk of phishing.
• Synchronization across computer, mobile and browser.
• Secure sharing of team access without sending it by email or messaging.
• Breach alerts that warn you if a service you use has been hacked.

How to choose the right manager

Not all managers are equal for your needs. A freelancer will favor simplicity and a free plan; a company with several employees will look instead for permission controls and team-based sharing. Here are the main criteria to compare before you commit.

Add two-factor authentication

Even the best password can be stolen in a data breach. Two-factor authentication (2FA or MFA) adds a second barrier: after your password, a temporary code is requested. Without that code, a hacker can't do anything, even if they know your password. It's the most cost-effective protection to enable today, because it blocks a large share of intrusion attempts.

Favor an authenticator app (Google Authenticator, Microsoft Authenticator, Authy) over SMS, which is more vulnerable to interception. Enable 2FA first on your critical accounts: business email, banking, hosting, social media and business tools. Also remember to keep your backup codes somewhere safe, since they're essential if you change phones.

The mistakes that undo all your efforts

Creating a good password is pointless if you fall into the classic traps. Here are the most common bad habits to ban immediately in your business.

• Reusing the same password across several sites: a single breach compromises all your accounts.
• Writing your passwords down on a sticky note, a notebook or an unprotected Excel file.
• Sending them by email or messaging to share them between colleagues.
• Just adding a number to an old password (MyPwd1, MyPwd2...): far too predictable.
• Using public personal information: company name, year, city, children's first names.
• Ignoring breach alerts: change any password flagged as compromised right away.
• Saving credentials in plain sight in the browser of a shared workstation accessible to everyone.

Sharing passwords between team members deserves special attention. Sending a credential by email leaves a trace that can be read indefinitely. If you need to share a sensitive document, it's better, for example, to protect your confidential PDFs with a password and share the key through a separate channel, rather than sending everything in the same message.

A company's cybersecurity is only as strong as its weakest link. A single neglected password can open every door.

Securing access across the whole company

Beyond the individual case, a small or mid-sized business needs to treat its access as a system. Who holds which credential? What happens when an employee leaves? How do you recover an account if the manager is unavailable? Answering these questions in advance prevents a lot of headaches.

• Centralize shared access in a team vault, never in a common spreadsheet.
• Assign individual accounts rather than a single credential shared by everyone.
• Immediately revoke the access of a departing team member, and change the shared passwords they knew.
• Document a recovery procedure for critical accounts.
• Combine this discipline with an automatic backup of your important files, because protected access is no substitute for a backup copy.

Frequently asked questions

In summary

Securing your access takes only a few simple decisions you can apply starting today: long, unique passwords, a strong passphrase for your vault, a manager for everything else, and two-factor authentication on your critical accounts. By eliminating bad habits and raising your team's awareness, you shield yourself from the vast majority of attacks, in just a few hours.

1. 1Adopt passwords of at least 12 characters, long and unique for every service.
2. 2Install a password manager and generate all your credentials automatically.
3. 3Memorize a single strong passphrase: your vault's.
4. 4Enable two-factor authentication on all your sensitive accounts.
5. 5Eliminate bad habits: reuse, sticky notes, sharing by email.
6. 6Raise your team's awareness, because security is everyone's business.

Want to go further and secure all of your tools, from your website to your automations? The TC Automation team can help you put solid digital hygiene in place, tailored to your organization. Let's talk about your project: a few well-thought-out settings are often all it takes to make a real difference.