Credentials
What Are Credentials?
Credentials are pieces of information used to prove identity or to grant access to a system, account, or service. Common examples include a username, a password, an email address, a verification code, or a digital key. In short, credentials are what a system checks to confirm that you are who you claim to be.
In computing and online services, credentials act as a gatekeeper. When you log in to an account, you present your credentials, and the system compares them against stored records. If they match, access is granted. If they do not, access is denied.
Types of Credentials
Credentials come in several forms, and many modern systems combine more than one for stronger protection. Some of the most common types include:
Knowledge-based credentials: something you know, such as a password or PIN.
Possession-based credentials: something you have, such as a phone receiving a one-time code or a hardware security key.
Inherence-based credentials: something you are, such as a fingerprint or facial scan.
In the cryptocurrency world, credentials take on additional meaning. A
private key is a powerful credential that proves ownership of funds and authorizes transactions. A
seed phrase is a related credential that can restore access to a self-custody wallet. These cryptographic credentials are based on
public-key cryptography, where a private key signs data and a matching public key allows others to verify it.
How Credentials Are Used
Credentials are central to account security across the internet. On most platforms, a username and password form the basic login credentials. Many services add an extra layer through
two-factor authentication (2FA), which requires a second credential, such as a time-based code, in addition to the password.
Regulated platforms may also collect identity credentials as part of
Know Your Customer (KYC) procedures, where documents like a passport or driver license help verify a user’s identity.
Keeping Your Credentials Secure
Because credentials control access to accounts and funds, protecting them is essential. Attackers often try to steal credentials through
phishing, where fake messages or websites trick users into revealing their login details. To reduce this risk, it generally helps to use strong, unique passwords, enable 2FA, and avoid sharing sensitive credentials.
In crypto, the stakes can be higher. Anyone who obtains your private key or seed phrase may be able to access your funds, and such transactions are typically irreversible. For this reason, these credentials should be stored offline and never shared with anyone.