version 1.1.0 adds playing card and friendship bracelet passwords

Cargo.lock

@@ -42,7 +42,7 @@ dependencies = [
 
 [[package]]
 name = "division_of_one"
-version = "1.0.2"
+version = "1.1.0"
 dependencies = [
  "rand",
 ]

Cargo.toml

@@ -7,7 +7,7 @@ keywords = ["passphrase", "password"]
 license = "AGPL-3.0"
 name = "division_of_one"
 repository = "https://six-five-six-four.com/git/reactor/division_of_one"
-version = "1.0.2"
+version = "1.1.0"
 
 [dependencies]
 rand = { version = "0.10.0", features = ["unbiased"] }

src/lib.rs

@@ -1,8 +1,15 @@
 use rand::{RngExt as _, seq::IndexedRandom as _};
 
+const ALPHABET: &str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+const CARD_VALUES: &str = "A234567890JQK";
+
 pub fn main() -> Result<(), String> {
     let mut args = std::env::args();
+
+    // Ignore the exe name
     let _ = args.next();
+
+    // Read the first arg as a command or flag
     match args.next().as_deref() {
         None => {}
         Some("--version") => {
@@ -16,6 +23,14 @@ pub fn main() -> Result<(), String> {
     println!("{}", create_pin(9));
     println!("{}", create_base32(8));
 
+    // Shuffling all 26 letters allows you to store 88 bits of information on beads on a bracelet. Destroying the bracelet doesn't reveal any information if all 26 letters are used.
+    println!("{}", create_shuffle(ALPHABET));
+
+    // Shuffling all 13 values of a suit of playing cards allow you to store 32.5 bits of information. A standard deck of cards can hold 130 bits of entropy ignoring suits. Mixing up the cards provably destroys the information.
+    for _ in 0..4 {
+        println!("{}", create_shuffle(CARD_VALUES));
+    }
+
     // Read a line of input so that the CLI can run in its own terminal without instantly closing the terminal when we exit.
     println!("Press Enter");
     let mut input = String::new();
@@ -56,6 +71,14 @@ pub fn create_pin(len: usize) -> String {
     digits.join("")
 }
 
+pub fn create_shuffle(input: &str) -> String {
+    use rand::prelude::SliceRandom;
+
+    let mut input: Vec<char> = input.chars().collect();
+    input.shuffle(&mut rand::rng());
+    String::from_iter(input.iter())
+}
+
 pub struct Dice {
     words: Vec<String>,
 }