How do I simulate a message digest?

Open this page and use the live Shannon Entropy tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.

Can I use my own numbers?

Absolutely — every input is adjustable, and with data import you can drive a message digest from your own measurements.

Use case · powered by Shannon Entropy

Shannon Entropy for a message digest

Simulate a message digest live in your browser. This runs the real Shannon Entropy solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students First Responders

Shannon Entropy & PasswordsLive

measuring information & strength

Entropy

60bits

brute-force time: 1 yr

Controls

Password / string

Shannon entropy measures information in bits — how many yes/no questions it takes to pin down a value. For a password it is length times the log₂ of the character-set size, quantifying how unpredictable it is. Each extra bit doubles the guessing effort, so length beats complexity: a long passphrase can carry more entropy than a short scramble of symbols.

▶ Run in Python

Data Inspector

Character pool62

Entropy59.5 bits

Strengthreasonable

Crack time1 yr

Governing equation

H = - i \sum p_{i} lo g_{2} p_{i} = lo g_{2} 62 = 5.95 bits/char \Rightarrow 10 \times 5.95 = 59.5 bits

Reading this result: 60 bits is reasonable for low-value logins but short of the ~60-bit bar; each added character here is worth 6.0 more bits.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

or unlock everything with Pro →

About this simulation

The full Shannon Entropy tool models a message digest with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with Shannon Entropy

Shannon Entropy for an RSA key Shannon Entropy for a password hash Shannon Entropy for a digital signature Shannon Entropy for a Diffie-Hellman exchange Shannon Entropy for a block cipher Shannon Entropy for a hash collision Shannon Entropy for a one-time pad Shannon Entropy for a Caesar cipher

Other ways to simulate a message digest

RSA Encryption for a message digest Diffie-Hellman for a message digest Classical Ciphers for a message digest Hash Avalanche for a message digest Huffman Coding for a message digest Hamming Code for a message digest

Frequently asked questions

How do I simulate a message digest?: Open this page and use the live Shannon Entropy tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?: Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?: Absolutely — every input is adjustable, and with data import you can drive a message digest from your own measurements.