ভূমিকা আজকের দিনে password leak, brute force, phishing attack —এসবের ঝুঁকি প্রতিনিয়ত বাড়ছে। শুধু পাসওয়ার্ডের ওপর নির্ভর করলে আপনার অ্যাপ্লিকেশন সিকিউরিটি দুর্বল হয়ে যায়। তাই প্রয়োজ

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