SimpleShamirSecretSharing

java.lang.Object

nxt.crypto.SimpleShamirSecretSharing

All Implemented Interfaces:: SecretSharing

public final class SimpleShamirSecretSharing extends Object implements SecretSharing

Method Summary

Modifier and Type

Method

Description

BigInteger

combine(SecretShare[] shares, BigInteger prime)

Given the needed number of shares or more, reproduce the original polynomial and extract the secret from its free term.

SecretShare[]

split(BigInteger secret, int needed, int available, BigInteger prime, Random random)

Given a secret, split it into "available" shares where providing "needed" shares is enough to reproduce the secret.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details
- split
  
  public SecretShare[] split(BigInteger secret, int needed, int available, BigInteger prime, Random random)
  
  Given a secret, split it into "available" shares where providing "needed" shares is enough to reproduce the secret. All calculations are performed mod p, where p is a large prime number.
  
  Specified by:
  
  split in interface SecretSharing
  
  Parameters:
  
  secret - the secret
  
  needed - the number of shares needed to reproduce it
  
  available - the total number of shares
  
  prime - the prime number
  
  random - the random source
  
  Returns:
  
  the secret shares
- combine
  
  public BigInteger combine(SecretShare[] shares, BigInteger prime)
  
  Given the needed number of shares or more, reproduce the original polynomial and extract the secret from its free term. All calculations are performed mod p, where p is a large prime number
  
  Specified by:
  
  combine in interface SecretSharing
  
  Parameters:
  
  shares - the shares represention points over the polynomial
  
  prime - the prime number
  
  Returns:
  
  the original secret reproduced from the free term of the polynomial which passes through these points