Sample diagram

  let mut mx = [[None; 7]; 7];
  mx[1][1] = Some('🍔');
  mx[1][5] = Some('🍟');
  mx[3][3] = Some('🍩');
  mx[5][1] = Some('🍦');
  mx[5][5] = Some('🌭');
  let diagram = SimpleDiagram(mx);

Generate mnemonic

  let master = diagram.to_master("🚲🍀🌈".as_bytes())?;
  let mnemonic = master.bip85_mnemonic(0, 15, Default::default())?;

"nice dumb debris type pair until convince pet depend dragon seed exchange rebel belt alcohol"

Generate wallet

  let priv_key = master.bip85_wallet(0)?;

L3X74sTsPBpoJx7MNWt36qnsGE1ubdf2BQVTczU7i14D94BhNdmc

Generate master key

  let xpriv = master.bip85_master(0)?;

xprv9s21ZrQH143K3Dm1EavEpwYyfZD7su3245k5CES8qnt6VVxznxnPqMnUx5cFLJDao9mcyELm9UVNbBTMYodNabKmvcj3WazUaRNqpz4qd7A

Generate password

  let pwd = master.bip85_password(0, 20, Password::Emoji)?;

🐬🔑🍎🐔🔒🚗🐸💧🌷✋🐍🚲💀💪💀🍄✈🍀🍉⚡

Entropy Evaluation

mnemonic 12 words entropy = (2048)¹² = (2¹¹)¹² = 2¹³²
mnemonic 24 words entropy = (2048)²⁴ = (2¹¹)²⁴ = 2²⁶⁴
(In fact, because the tail of 4bits/8bits is a checksum, the real entropy is 2¹²⁸/2²⁵⁶.)

Only Emoji Characters

emoji characters amount 1,431 ≈ 2¹⁰
9 cells permutation in 7 * 7 grid = (A₄₉⁹) = 49! / 40! ≈ 2⁴⁹
9 emoji characters in simple diagram = (2¹⁰)⁹ * 2⁴⁹ = 2¹³⁹ > 2¹³²
18 cells permutation in 7 * 7 grid = (A₄₉¹⁸) = 49! / 31! ≈ 2⁹⁵
18 emoji characters in simple diagram = (2¹⁰)¹⁸ * 2⁹⁵ = 2²⁷⁵ > 2²⁶⁴

So, 9 emoji characters provide the equivalent encryption strength of 12 mnemonics.
and 18 emoji characters provide the equivalent encryption strength of 24 mnemonics.

Any Unicode Characters

unicode characters amount 155,063 ≈ 2¹⁷
6 cells permutation in 7 * 7 grid = (A₄₉⁶) = 49! / 43! ≈ 2³³
6 unicode characters in simple diagram = (2¹⁷)⁶ * 2³³ = 2¹³⁵ > 2¹³²
12 cells permutation in 7 * 7 grid = (A₄₉¹²) = 49! / 37! ≈ 2⁶⁵
12 unicode characters in simple diagram = (2¹⁷)¹² * 2⁶⁵ = 2²⁶⁹ > 2²⁶⁴

So, 6 unicode characters provide the equivalent encryption strength of 12 mnemonics.
and 12 unicode characters provide the equivalent encryption strength of 24 mnemonics.

ComplexDiagram can be filled with 50 unicode characters in a cell, providing better encryption strength.
(In fact, higher entropy values are meaningless because the length of the private key is 256 bits. So, we support multisig address derivation.)