Password Security: Why One Bad Password Can Become a Very Big Problem

Most people know their passwords probably aren’t great.

But we also live in a world where every website, app, streaming service, bank, courier company and online store wants us to create another login. So eventually people do what humans naturally do – they simplify things.

A pet’s name.
A birthday.
“Summer2025!”
The same password reused across five different websites.
Or a spreadsheet called “passwords.xlsx”.

The problem is cybercriminals know this too.

And because millions of usernames and passwords from old data breaches are already floating around online, attackers often don’t need to “hack” anything at all. They just try old passwords against new accounts and see what works.

If one password unlocks everything, your security is only as strong as the weakest website you’ve ever signed up for.

A leaked password from an old shopping website in 2019 might suddenly give someone access to your email, cloud storage or business systems years later.

So what should you do?

The good news is modern password security is less about creating impossible passwords and more about creating smarter systems.

One of the best things you can use is a passphrase. Instead of a single complicated word full of symbols, think of a random sentence or combination of unrelated words that’s easy for you to remember but hard for software to guess.

Something like:  CoffeeTrainBlueRiver!27

is unsurprisingly stronger than:  P@ssword1

It’s also worth using a proper password manager or keychain system rather than relying on memory alone (or noting it down). Good password managers generate unique passwords for every website and store them securely, so you don’t end up reusing the same login everywhere.

And if you’re not already using Multi-Factor Authentication (MFA), now is probably the time. That extra approval step on your phone can stop a huge number of attacks even if a password gets exposed. If a website you trust asks you if you want to implement MFA, do it!

One thing we’d also strongly recommend avoiding is random “free” password vault software from unknown providers. If you’re trusting something with every password you own, it’s worth using reputable platforms with a strong security track record.

And if you think you may already have been compromised? Don’t panic – but act quickly.

Start by changing your email password first, because email accounts are usually the gateway to everything else. Then begin “rolling” your passwords across important accounts:

• banking
• Microsoft or Google accounts
• cloud storage
• work systems
• social media
• shopping accounts

And this time, make each one unique.

If you are a Chrome person, store them in Google Password Manager (it will ask you in Chrome if you want to create or store a password)

If you are a Safari person, store them in Safari Password Manager which is called Apple Keychain.

As part of our Cybersecurity Series, we’re offering free cybersecurity checkups and dark web exposure checks for businesses and households.

We can help identify:

• compromised passwords
• exposed accounts
• weak security practices
• and easy improvements that make a real difference.

Not sure where your risks are? We’ll help you find them and fix them. Contact us for your free checkup today. Email krishna@aa.net.nz or phone 021 947 357

Check in again over the next few weeks for practical tips around Parental Controls and Cybersecurity Maintenance.