Package org.bouncycastle.crypto.threshold

Interface SecretSplitter

All Known Implementing Classes:

ShamirSecretSplitter

public interface SecretSplitter

Secret sharing (also called secret splitting) refers to methods for distributing a secret among a group. In this process, no individual holds any intelligible information about the secret. However, when a sufficient number of individuals combine their 'shares', the secret can be reconstructed.

Method Summary

Modifier and Type	Method	Description
SplitSecret	resplit(byte[] secret, int m, int n)	Creates secret shares from a given secret.
SplitSecret	split(int m, int n)	Creates secret shares.
SplitSecret	splitAround(SecretShare s, int m, int n)	Creates secret shares from a given secret share.

Method Detail

split

SplitSecret split(int m,
                  int n)

Creates secret shares. The secret will be divided into shares, where the secret has a length of L bytes.

Parameters:

m - A threshold number of shares

n - Total number of shares

Returns:

the n generated secret shares, each L bytes long, any m of which recover the secret.

splitAround

SplitSecret splitAround(SecretShare s,
                        int m,
                        int n)
                 throws java.io.IOException

Creates secret shares from a given secret share. The secret will be divided into shares, where the secret has a length of L bytes.

Parameters:

m - A threshold number of shares

n - Total number of shares

Returns:

the n generated secret shares, each L bytes long, any m of which recover the secret. The first of them is s.

Throws:

java.io.IOException

resplit

SplitSecret resplit(byte[] secret,
                    int m,
                    int n)

Creates secret shares from a given secret. The secret will be divided into shares, where the secret has a length of L bytes.

Parameters:

m - A threshold number of shares

n - Total number of shares

Returns:

the n generated secret shares, each L bytes long, any m of which recover the secret.