In the past month, Ring – a home security and smart home company owned by Amazon – has drawn scrutiny over a series of breaches, prompting concerns about privacy.

After conducting an investigation in the wake of a recent incident in Mississippi, the cause, according to Ring, is recycled account credentials. Users reused their login information from external, non-Ring services, which allowed hackers to gain access to the devices. In addition to using unique, complex passwords for every account, multifactor authentication is also effective in mitigating cybercrime.