This is the 5003rd most frequent French word.
sécurisés
Secured or made safe.
Here 'sécurisés' describes the state or quality of the safes, indicating they are safe and secure.
Les documents sont stockés dans des coffres-forts sécurisés.
The documents are stored in secure safes.
In this sentence, 'sécurisés' is used as a past participle denoting that actions should be taken to make the accounts secure.
Les comptes en ligne doivent être sécurisés contre les cyberattaques.
Online accounts must be secured against cyberattacks.
The word 'sécurisés' here indicates that the accesses are protected and made secure through the use of codes.