Struct SecomCipher 

pub struct SecomCipher { /* private fields */ }

SECOM cipher implementation.

SECOM is a VIC-derived cipher that uses a single key phrase and a frequency string to initialize its components: a straddling checkerboard and two columnar transpositions (one regular and one disrupted).

Implementations

impl SecomCipher

pub fn new(key_phrase: &str, freq: &str) -> Result<Self>

Creates a new SecomCipher instance.

Arguments

• key_phrase - A string of at least 20 letters used for key derivation.
• freq - A 7-letter frequency string for the checkerboard (e.g., “ESTONIA”).

Trait Implementations

impl Block for SecomCipher

fn encrypt(&self, dst: &mut [u8], src: &[u8]) -> usize

Encrypts source data into destination buffer.

This implementation performs:

1. Preprocessing (uppercase, space conversion).
2. Checkerboard encoding.
3. Padding to a multiple of 5.
4. First (regular) columnar transposition.
5. Second (disrupted) columnar transposition.

fn decrypt(&self, dst: &mut [u8], src: &[u8]) -> usize

Decrypts source data into destination buffer.

This implementation performs:

1. Second (disrupted) columnar transposition (reverse).
2. First (regular) columnar transposition (reverse).
3. Padding removal.
4. Checkerboard decoding.
5. Postprocessing.

fn block_size(&self) -> usize

impl Debug for SecomCipher

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.