# CryptoX942Concat

`import { CryptoX942Concat } from "destack:crypto/binding";`

X9.42 concat derivation.

```ds title="CryptoX942Concat"
export struct CryptoX942Concat<'a> {
    digest: CryptoDigestAlgorithm;
    secret: &'a readonly [uint8];
    algorithmId: &'a readonly [uint8];
    partyUInfo: &'a readonly [uint8];
    partyVInfo: &'a readonly [uint8];
    publicInfo: &'a readonly [uint8];
    privateInfo: &'a readonly [uint8];
}
```

[language/library/src/crypto/binding/kdf.ds:107:122](https://github.com/destack-sh/destack/blob/main/language/library/src/crypto/binding/kdf.ds#L107-L122)

## Members

### `digest: CryptoDigestAlgorithm`

Digest algorithm.

### `secret: &'a readonly [uint8]`

Shared secret bytes.

### `algorithmId: &'a readonly [uint8]`

Algorithm identifier bytes.

### `partyUInfo: &'a readonly [uint8]`

Party U info bytes.

### `partyVInfo: &'a readonly [uint8]`

Party V info bytes.

### `publicInfo: &'a readonly [uint8]`

Public supplemental info bytes.

### `privateInfo: &'a readonly [uint8]`

Private supplemental info bytes.