Question

How to mask sensitive parts of a string (e.g. email addresses) in C++

Answer 1

#include <iostream>
#include <string>

std::string maskEmail(const std::string& email) {
    auto atPos = email.find('@');
    if (atPos == std::string::npos || atPos < 2) return email;

    std::string masked(atPos - 1, '*');
    
    return email[0] + masked + email.substr(atPos);
}


int main() {
    std::cout << maskEmail("john.doe@example.com");
}

 
 
/*
run:
 
j*******@example.com

*/

 

 

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