Is your password something like Password123!? Or worse, 12345678? If so, your account can be cracked in under a second. That’s not scaremongering — it’s the reality of 2026 compute power. This post explains how hackers crack passwords, what entropy bits really mean, and how long is “strong enough.” Pair with the Piick password generator to see real-time entropy values — stop guessing when setting passwords.

How hackers crack passwords

The 3 most common attack methods:

  • Dictionary attack: Uses a list of common passwords (rockyou.txt has 14 million entries) tried one by one — 123456, qwerty, password get cracked instantly
  • Brute force: Starts from 1 character and exhaustively tries all combinations; the longer the password, the more time it takes, growing exponentially
  • Rainbow tables: Pre-compute a giant “hash -> plaintext” lookup table, then just look up to crack

In 2026, a consumer GPU can run tens of billions of MD5 hashes per second. An 8-character all-digit password (1 billion combinations) takes your neighbor’s computer about 0.01 seconds. An 8-character letters + digits + symbols combo (about 6.9 x 10^15 combinations) lasts a few hours at most. So “8-character complex password” is far from enough in 2026.

What entropy bits really mean

Entropy is a core cryptography concept that measures “information uncertainty,” in bits. The formula is simple: entropy = length x log2(charset size).

Character set = uppercase + lowercase letters (52) + digits (10) + symbols (~30) ~ 92 characters. log2(92) ~ 6.5, so each extra character adds 6.5 bits of entropy.

Practical meaning of entropy: worst-case attempts to crack = 2^n. 50 bits of entropy = 1.13 x 10^15 attempts, which takes a 2026 GPU about 1 hour. 80 bits = 1.2 x 10^24 attempts, which by current compute growth curves won’t be cracked until 2050. So your target: password entropy of at least 80 bits.

How long is “strong enough”

With a 92-character charset:

  1. 8 characters -> 52 bits of entropy -> not enough
  2. 10 characters -> 65 bits of entropy -> borderline
  3. 12 characters -> 78 bits of entropy -> almost safe
  4. 14 characters -> 91 bits of entropy -> strong enough
  5. 16 characters -> 104 bits of entropy -> heirloom grade

If you only use lowercase letters (26-character charset), multiply all the above by log2(26) / log2(92) ~ 0.55, so 16 lowercase chars ~ 91 bits — still strong enough. The key is length, not complexity — correct horse battery staple has more than 2x the entropy of Tr0ub4dor&3, and is easier to remember.

Use Piick to see the strength instantly

The Piick password generator shows real-time entropy and strength rating as you generate — adjust length, add character classes, tick “exclude ambiguous characters” (to remove look-alikes like 0/O, 1/l/I), and watch entropy climb from 50 bits to 100 bits in real time.

The Piick password generator uses the browser’s native crypto.getRandomValues as its random source, not Math.random — passwords are truly unpredictable.

The strength hint in the Piick password generator tells you:

  • Entropy below 40 bits: very weak — any dictionary attack cracks it instantly
  • 40-60 bits: weak — a single GPU cracks it in days
  • 60-80 bits: medium — short-term protection OK, long-term no
  • 80-100 bits: strong — use with confidence
  • 100+ bits: extremely strong — heirloom grade

Target: password entropy of at least 80 bits. Length of 14+ characters with mixed character classes basically gets you there.

Open the Piick password generator now, slide length to 14, tick all character classes, and generate a strong password with 80+ bits of entropy.