Pemeriksa Kekuatan Kata Sandi

Kalkulator ini memberikan perhitungan instan dan akurat di bidang ini. Masukkan data Anda dan dapatkan hasil segera dengan penjelasan yang jelas. Alat gratis ini bekerja sepenuhnya di browser Anda — tanpa transfer data, tanpa registrasi.

Perhitungan akurat di bidang ini memerlukan pemahaman rumus dan standar yang mendasarinya. Kalkulator kami menerapkan metode yang paling banyak diterima yang direkomendasikan oleh lembaga internasional dan konsensus ilmiah. Hasilnya berguna untuk keuangan pribadi, pemantauan kesehatan, proyek teknis, atau tujuan pendidikan. Alat ini memproses data Anda secara lokal untuk menjaga privasi. Gratis, tanpa registrasi.

What is password entropy and why does it matter?

Password entropy is measured in bits and quantifies the unpredictability of a password. It is calculated as: entropy = length × log₂(charset size). An 8-character lowercase-only password has a charset of 26, yielding 8 × 4.7 = 37.6 bits of entropy. Adding uppercase letters (charset 52) raises it to 45.6 bits; adding digits (charset 62) to 47.6 bits; adding symbols (charset 94) to 52.4 bits. Security experts generally recommend a minimum of 80 bits of entropy for sensitive accounts — achievable with a 14-character password using mixed character types. Every additional character multiplies security exponentially, not linearly.

Brute force vs dictionary attacks: how passwords are actually cracked

Modern GPU-accelerated cracking tools such as Hashcat can test over 100 billion password guesses per second against MD5 hashes — meaning an 8-character password with only lowercase letters can be cracked in under 2 seconds. Dictionary attacks are even faster: they test millions of common passwords, names and phrases first. NIST SP 800-63B (2017) now recommends prioritising length over complexity — a 16-character passphrase like "coffee-mountain-river-27" is far more secure and memorable than "C0ff33!m@" despite being easier to type. Generate strong passwords with our Password Generator, then verify their strength here.