Data breaches → Atlas Quantum
Was your data in the Atlas Quantum breach?
2018 · atlasquantum.com · ~261,463 accounts exposedHigh severity · 7/10
Atlas Quantum (atlasquantum.com) suffered a data breach in 2018 that exposed around 261,463 accounts. If you had an account, some of your personal data may be circulating in leaked databases. The fastest way to know is to check your own email — free, in about 30 seconds, no password required.
What happened
In August 2018, the cryptocurrency investment platform Atlas Quantum suffered a data breach. The breach leaked the personal data of 261k investors on the platform including their names, phone numbers, email addresses and account balances.
Breach details sourced from Have I Been Pwned, the industry-standard breach database. Risk analysis by Nullivo.
What was exposed, and why it matters
Not all breaches carry the same risk — what matters is which fields leaked. Here is what the Atlas Quantum breach exposed and what each item actually enables:
Enables SIM-swap attacks (hijacking your number to intercept SMS codes), smishing, and voice scams that appear to come from your bank.
Links this leak to your other accounts — a reused username lets anyone build a profile of you across platforms.
Puts you on spam and phishing lists, and confirms to attackers that you hold an account with this service — which makes impersonation emails more believable.
Also listed in this breach: Account balances, Email addresses, Names, Phone numbers.
What to do if you were affected
These steps are ordered for this specific breach — the most urgent action given what leaked comes first.
- Phone numbers: Move two-factor authentication off SMS to an authenticator app or passkey, and add a port-out PIN with your mobile provider.
- Names and usernames: Search your usual username to see what else it exposes, and use distinct handles for sensitive accounts.
- Email addresses: Treat any message referencing this service with suspicion, and never act on links in unexpected emails.
- Check whether your own email appears in this breach — run a free scan to confirm before you spend time on the steps above.
How urgent is this now?
This breach is over 8 years old. Old credentials still cause harm — leaked passwords from a decade ago are still tried against new accounts every day.
Remember: a breach can't be "un-leaked" — once a database is out, it exists in countless copies. The goal is to make the leaked data useless: change what can be changed, lock down what can't, and remove what has been republished.
Frequently asked questions
What data was exposed in the Atlas Quantum breach?
The Atlas Quantum breach exposed phone numbers, names and usernames, email addresses. Enables SIM-swap attacks (hijacking your number to intercept SMS codes), smishing, and voice scams that appear to come from your bank.
How many people were affected by the Atlas Quantum breach?
Around 261,463 accounts were exposed, making it a mid-sized breach.
What should I do if I had a Atlas Quantum account?
Move two-factor authentication off SMS to an authenticator app or passkey, and add a port-out PIN with your mobile provider. You can check whether your own email appears in this breach with a free Nullivo scan — no password required.
Breaches that exposed similar data
If the Atlas Quantum breach affected you, these breaches exposed comparable information — worth checking too, since leaked datasets are routinely combined.
- Was your data in the TrueFire breach? (2020, ~599,667 accounts)
- Was your data in the Banorte breach? (2014, ~2,107,000 accounts)
- Was your data in the Paddy Power breach? (2010, ~590,954 accounts)
- Was your data in the Ajarn breach? (2018, ~266,399 accounts)
- Was your data in the Foxy Bingo breach? (2008, ~252,216 accounts)
- Was your data in the GoldSilver breach? (2018, ~242,715 accounts)