org.logi.crypto.secretshare
Class SecretShare
java.lang.Object
|
+--org.logi.crypto.Crypto
|
+--org.logi.crypto.secretshare.SecretShare
- All Implemented Interfaces:
- PrettyPrintable
- Direct Known Subclasses:
- PolySecretShare, XorSecretShare
- public abstract class SecretShare
- extends Crypto
This class stores a share of a secret.
If a secret is m/n-shared this means that n shares are created and that
M shares are needed to retrieve the secret.
If the sharing algorithm is secure, then m-1 shares gives no information
about the secret.
- Author:
- Logi Ragnarsson
(logir@logi.org)
Fields inherited from class org.logi.crypto.Crypto |
BIT, cdsPath, EMPTY_ARRAY, FOUR, keySource, NIBBLE, ONE, primeCertainty, random, TWO, ZERO |
Constructor Summary |
SecretShare(int m,
int n)
Create an object for an m/n share. |
Method Summary |
int |
getM()
Get the number of shares needed to retrieve the secret. |
int |
getN()
Get the number of created shares. |
static byte[] |
retrieve(SecretShare[] shares)
retrieve the secret from an array of shares. |
Methods inherited from class org.logi.crypto.Crypto |
binString, binString, ensureArrayLength, ensureArrayLength, equal, equalRelaxed, equalSub, fromHexNibble, fromHexString, fromString, fromString, hexString, hexString, hexString, hexString, hexString, initRandom, initRandom, makeClass, makeInt, makeLong, makeSessionKey, pastSpace, pickBits, pickBits, prettyPrint, prettyPrint, readBlock, readInt, trimArrayLength, trimArrayLength, trimLeadingZeroes, writeBytes, writeBytes, writeInt |
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SecretShare
public SecretShare(int m,
int n)
- Create an object for an m/n share.
getN
public int getN()
- Get the number of created shares.
getM
public int getM()
- Get the number of shares needed to retrieve the secret.
retrieve
public static byte[] retrieve(SecretShare[] shares)
throws SecretSharingException
- retrieve the secret from an array of shares.
- Throws:
SecretSharingException
- if the secret can't be retrieved.
Copyright 1997-2000 Logi Ragnarsson