Carry out MFA Registration
When a new user signs up, the app must register a second factor (phone number).
First, get a multi-factor user session:
import {
Telephone Authentication Provider,
Telephone MultiFactor Generator,
getAuth,
multifactor
} from ‘@react-native-firebase/auth’;
const multiFactorUser = await multiFactor(getAuth().currentUser);
const session = await multiFactorUser.getSession();
Next, send the verification code to the user’s telephone number.
const verifyId = wait new PhoneAuthProvider(getAuth())
.verifyPhoneNumber({ phoneNumber, session });
Finally, verify the OTP and register the second factor.
const credentials = PhoneAuthProvider.credential(
ID verification,
verification code
);
const multiFactorAssertion =
PhoneMultiFactorGenerator.assertion(credentials);
await multiFactorUser.enroll(multiFactorAssertion);
It connects the user’s phone number as a second authentication factor.
Handling MFA At Login
When an existing user with MFA enabled tries to sign in, Firebase raises a custom error indicating that additional verification is required.
Example of login attempt:
signInWithEmailAndPassword(auth, email, password)
If MFA is required, Firebase will return:
auth/multi-factor-auth-required
Using the solver provided by Firebase, we can send OTP to the registered phone number and verify it.
const resolver = getMultiFactorResolver(auth, error);
const verifyId =
wait auth.verifyPhoneNumberWithMultiFactorInfo(
resolver.hint[0],
resolver.session
);
Once the user enters the OTP, the authentication process is complete.
Key Security Benefits
Implementing MFA in mobile apps provides several benefits:
Stronger Account Protection
Even if a password is compromised, an attacker cannot access the account without a second factor.
Reduces the Risk of Credential Theft
Many cyberattacks rely on stolen credentials. MFA adds another layer of verification.
Industry Standard Security
MFA is widely used in:
- Banking and fintech applications
- Health care system
- Enterprise platform
- Applications that store sensitive data
Developer Benefits
Using Firebase MFA also improves development workflows:
- Built-in authentication infrastructure
- Sending OTP SMS is handled by Firebase
- Secure verification mechanism
- Minimal backend configuration
Developers can focus on application features rather than building an authentication system from scratch.
PakarPBN
A Private Blog Network (PBN) is a collection of websites that are controlled by a single individual or organization and used primarily to build backlinks to a “money site” in order to influence its ranking in search engines such as Google. The core idea behind a PBN is based on the importance of backlinks in Google’s ranking algorithm. Since Google views backlinks as signals of authority and trust, some website owners attempt to artificially create these signals through a controlled network of sites.
In a typical PBN setup, the owner acquires expired or aged domains that already have existing authority, backlinks, and history. These domains are rebuilt with new content and hosted separately, often using different IP addresses, hosting providers, themes, and ownership details to make them appear unrelated. Within the content published on these sites, links are strategically placed that point to the main website the owner wants to rank higher. By doing this, the owner attempts to pass link equity (also known as “link juice”) from the PBN sites to the target website.
The purpose of a PBN is to give the impression that the target website is naturally earning links from multiple independent sources. If done effectively, this can temporarily improve keyword rankings, increase organic visibility, and drive more traffic from search results.
