Two-Factor Authentication (2FA) and SMS Security
Protect your systems and data by implementing robust 2FA strategies with SMS-based verification.
Read Implementation GuideWhy 2FA Matters for Modern Security
Passwords alone aren't enough. Two-Factor Authentication combines something you know (password) with something you have (phone) to create a much stronger defense against unauthorized access.
In our SMS-based 2FA implementation, we send one-time codes via SMS to verified user devices, ensuring both authenticity and immediate access control.
How SMS-Based 2FA Works
Step 1
User enters login credentials
Step 2
System generates and sends 6-digit code via SMS
Step 3
User enters code from SMS to complete verification
Security Advantages of SMS 2FA
Industry Standard
Widely adopted by leading platforms like Google, Microsoft, and AWS
Zero Client Setup
Automatically handled by our SMS API with minimal integration effort
Secure Delivery
All messages encrypted in transit with TLS 1.3 and carrier-grade SMS protocols
Real-Time Tracking
Delivery status and failure alerts via webhooks for monitoring
How to Implement SMS 2FA
Step 1: Configure API Access
curl -X POST "https://api.egkkikikifistis.gr/v2/2fa/initiate"
-H "Authorization: Bearer YOUR_API_KEY"
-H "Content-Type: application/json"
-d '{"phone":"+14155550123","user": "user123"}'
Response:
{
"requestId": "REQ-890293",
"expiresIn": 120,
"deliveryStatus": "pending"
}
Step 2: Validate User Response
curl -X POST "https://api.egkkikikifistis.gr/v2/2fa/validate"
-H "Authorization: Bearer YOUR_API_KEY"
-H "Content-Type: application/json"
-d '{"code":"012345","requestId":"REQ-890293"}'
Success Response:
{
"valid": true,
"usedAt": "2025-10-03T14:32:19Z",
"remainingAttempts": 2
}
Step 3: Store Result in Session
// Pseudocode Example
if isValidCode:
createSecureSession(user)
setCookie("auth_token", jwt.sign(user), expires=30m)
Security Recommendations
Rate Limiting
Enforce 5 attempts per minute per IP address to prevent brute-force attacks
Masking
Never display raw phone numbers in logs or UI elements
Expiry Enforcement
Codes expire after 5 minutes by default with automatic cleanup in our system
Case Study: Financial Services Provider
Our SMS 2FA solution helped this company achieve:
- 98%+ Uptime 99.99% SLA
- 0.003% Fraud Reduced breaches by 73%
- 22ms Avg Code Delivery Latency
With our SMS-based 2FA implementation, their banking application now handles 850,000+ transactions daily with 99.99% successful authentications and sub-50ms code delivery latency.
Request 2FA DemoImplementation Code Snippets
Python Example
import requests
API_KEY = "your_api_key"
def send_2fa_code(phone):
url = "https://api.egkkikikikifistis.gr/v2/2fa/init"
headers = {"Authorization": f"Bearer {API_KEY}"}
data = {"phone": phone}
return requests.post(url, headers=headers, json=data)
def verify_code(request_id, user_input):
url = "https://api.egkkikikifistis.gr/v2/2fa/check"
data = {"requestId": request_id, "code": user_input}
return requests.post(url, headers=headers, json=data)
Node.js Example
const fetch = require("node-fetch");
async function begin2FASession(phone) {
const response = await fetch("https://api.egkkikikifistis.gr/v2/2fa/init", {
method: "POST",
headers: {
"Authorization": `Bearer ${process.env.API_KEY}`,
"Content-Type": "application/json"
},
body: JSON.stringify({ phone })
});
return await response.json();
}
Webhook Response
{
"event": "2fa.success",
"accountId": "AC-163522",
"userId": "user123",
"phone": "+14155550123",
"timestamp": "2025-10-03T14:22:28Z"
}
Ready to Secure Your Next App?
Our SMS 2FA solution provides enterprise-grade security with zero infrastructure management. We handle delivery, retries, logging and fraud detection.