Here is Why You Should Never Reuse Passwords
We have all heard that we should create a unique password for every system and application we use. A recent cloud data platform breach proved the validity of that warning.
Multiple corporate users and third-party contractors reused passwords across personal and corporate profiles. Because the credentials were never rotated, they remained active. Threat actors simply logged into corporate cloud environments using valid credentials that had been harvested by malware. They penetrated more than 165 corporate customers, exposing the personal records of more than 500 million individuals.
Credential stuffing attacks like the aforementioned breach cannot exist without password reuse. They rely on the fact that more than 60 percent of users reuse the same password across multiple personal and corporate accounts.
How Credential Stuffing Attacks Work
Hackers do not guess passwords during a stuffing attack. They take a verified list of usernames and passwords leaked from a prior data breach and try them on a different website. If the user did not reuse their password, the attack fails. If they did, it will likely result in a major breach.
When you reuse a password across multiple services, you are only as secure as the weakest website. If a small, poorly secured hobby forum or online store suffers a data breach, hackers will steal its user database. Within hours, those stolen email and password combinations are posted on dark web forums or fed into automated hacking bots. Those bots immediately test your credentials against high-value targets.
If an attacker uses a recycled password to break into your primary email account, they effectively control your entire digital life. They can trigger “Forgot Password” resets for every other service you use, routing the confirmation links directly to themselves.
Reusing a personal password for a corporate account endangers your employer. Cyber espionage actors routinely target the weak personal security habits of employees to gain an initial foothold into protected corporate infrastructures.
How to Break the Habit of Password Reuse
To remain secure without reusing passwords, humans must stop inventing them. Hackers use software that can guess simple passwords almost instantly. Moving to long, unique passphrases drastically alters the security math. A hacker can crack “P@ssword1” in seconds. Cracking a string of 16 or more random alphanumeric characters and symbols is virtually impossible.
The human brain is not designed to remember dozens of long, unique passphrases. The only sustainable solution is to utilize dedicated tools. Browsers such as Chrome automatically generate and store long, random passwords for every site you visit. There are also standalone password management tools available where you only need to remember one strong master passphrase.