Client-Side Cryptographic Password Security
The ClickAndOne Password Generator and Strength Checker creates highly resilient, unpredictable passwords completely inside your browser using the W3C Web Cryptography standard (crypto.getRandomValues). Unlike conventional online generators that rely on pseudo-random numbers or transmit passwords across the internet, ClickAndOne guarantees zero server communication, zero logging, and zero persistence.
Every generated credential uses mathematically unbiased rejection sampling to eliminate modulo skew, ensuring all characters in your configured alphabet have an equal probability of selection.
Why True Cryptographic Randomness Matters
CSPRNG vs. Pseudo-Random Math.random()
Standard JavaScript Math.random() uses non-cryptographic PRNG algorithms (such as xorshift128+) designed for graphical games, not security. An attacker observing past outputs can predict future seeds. Our generator uses hardware-entropy CSPRNG, making reverse engineering computationally infeasible.
Zero Modulo Bias (Rejection Sampling)
When mapping an 8-bit random byte (0 to 255) onto a pool of size K where 256 is not evenly divisible by K, naive modulo operations bias lower indices. Our rejection sampling discards out-of-range values, guaranteeing uniform distribution.
Information-Theoretic Shannon Entropy
Password strength is quantified in bits of entropy: E = L × log2(S), where L is length and S is active alphabet size. A 16-character password using all four character sets provides approximately 95 bits of entropy, requiring billions of years to brute-force.
Zero Transmission & Zero Storage
Passwords never touch application storage, cookies, local storage, URL hashes, or remote telemetry. When you reset the tool or close your tab, all sensitive memory references are immediately cleared by the JavaScript engine.
Password Length & Offline Brute-Force Resilience
The table below illustrates estimated brute-force times against high-performance offline cracking hardware (assuming 10 billion guesses per second across modern GPU clusters):
| Password Length | Character Types | Entropy Bits | Estimated Crack Time | Security Tier |
|---|---|---|---|---|
| 6 characters | Lowercase + Digits | ~31 bits | Under 1 second | Very Weak |
| 8 characters | Letters + Numbers | ~47 bits | A few hours | Weak |
| 12 characters | Upper, Lower, Digits | ~71 bits | Decades | Fair |
| 16 characters | All sets + Symbols | ~95 bits | Millions of years | Strong |
| 24 characters | All sets + Symbols | ~143 bits | Trillions of years | Very Strong |
3 Steps to Generating Strong Credentials
- Select Target Length: Slide the length selector to 16 characters or greater. For master passwords and administrative access, use 20–32 characters.
- Configure Character Sets: Keep uppercase, lowercase, numbers, and symbols checked. If writing credentials manually onto paper or mobile keypads, check Exclude Ambiguous Characters to remove lookalikes like
0andO. - Copy and Store: Click the copy button to transfer the password to your clipboard, and paste it directly into your preferred password manager (e.g. 1Password, Bitwarden, or KeePass).
Frequently Asked Questions
Is it safe to generate passwords in a web browser?
Yes, provided the tool executes 100% locally using standard Web Cryptography APIs without transmitting credentials to a server. ClickAndOne performs all randomness draws and character shuffling directly in your local browser sandbox.
Does a strength estimator guarantee my password cannot be hacked?
No mathematical score can guarantee immunity from all cyber threats. Entropy calculations model resistance against automated brute-force attacks. However, real-world security also depends on avoiding password reuse, enabling multi-factor authentication (MFA), and guarding against phishing scams and data breaches.
What are ambiguous characters and why exclude them?
Ambiguous characters are typographical glyphs that look nearly identical in standard fonts, such as digit 0 and uppercase O, or digit 1, lowercase l, and uppercase I. Excluding them prevents costly typing mistakes when passwords must be shared verbally or entered on mobile keyboards.