"Using your email address as your username has become the standard. In many cases, you simply enter your email address and choose a password. Some services remove the need for a password altogether, allowing you to register using just your email address and a onetime code sent to it. Others offer the option to connect your account directly to your Google or Apple identity."
"As we scroll, shop, apply, and register across services, our email address quietly becomes our identity everywhere, from shopping platforms to banking to travel. Over time, more and more of our activity starts pointing back to a single account. While it all feels convenient, there is an issue we often forget. Our email is not just an access point. It holds sensitive information about us-both in what we receive and what we send-and it is tied to many, if not most, of the services we use."
"We rely on it to receive one-time codes, confirm actions, and reset passwords. It is also where we communicate with accountants, bankers, doctors, and other providers, as well as for personal communication. Over time, this turns our email into more than just another account. It becomes a central point of access, connected to multiple parts of our lives."
"Every time you use your email to log into a service, you are connecting another account directly to it. Over time, more and more services become tied to that same identity, and your email becomes the place that links them all. As a result, one email account ends up controlling access to many different accounts, across services that have nothing to do with each other. If someone gains access to your email, they can use standard flows, password resets, login confirmations, and verification emails to access those connected services."
Many services use email as a username, letting users register with an email address and password, or sometimes with only a one-time code sent to that address. Some services also allow direct connection to Google or Apple identities. As people sign up, shop, apply, and register across platforms, the same email becomes a shared identifier across shopping, banking, and travel. Email is used to receive one-time codes, confirm actions, and reset passwords, and it also serves as a communication channel with professionals and personal contacts. This makes email a central access point tied to multiple parts of life. Logging into services with the same email links many accounts to one identity, so email compromise can allow attackers to use standard recovery and verification flows to reach connected services and access personal information such as medical, financial, addresses, contacts, and private messages.
#email-based-authentication #account-security #identity-centralization #one-time-codes #privacy-risk
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