Package net.i2p.imagegen

Class RandomArt

java.lang.Object

net.i2p.imagegen.RandomArt

public class RandomArt
extends Object

Draw an ASCII-Art representing the fingerprint so human brain can profit from its built-in pattern recognition ability. This technique is called "random art" and can be found in some scientific publications like this original paper: "Hash Visualization: a New Technique to improve Real-World Security", Perrig A. and Song D., 1999, International Workshop on Cryptographic Techniques and E-Commerce (CrypTEC '99) sparrow.ece.cmu.edu/~adrian/projects/validation/validation.pdf The subject came up in a talk by Dan Kaminsky, too. If you see the picture is different, the key is different. If the picture looks the same, you still know nothing. The algorithm used here is a worm crawling over a discrete plane, leaving a trace (augmenting the field) everywhere it goes. Movement is taken from dgst_raw 2bit-wise. Bumping into walls makes the respective movement vector be ignored for this turn. Graphs are not unambiguous, because circles in graphs can be walked in either direction.

Since:

0.9.25

Constructor Summary

Constructors

Constructor	Description
RandomArt()

Method Summary

Modifier and Type	Method	Description
static String	gnutls_key_fingerprint_randomart(byte[] dgst_raw, String key_type, int key_size, String prefix, boolean unicode, boolean html)
static void	main(String[] args)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RandomArt

public RandomArt()

Method Detail

gnutls_key_fingerprint_randomart

public static String gnutls_key_fingerprint_randomart(byte[] dgst_raw,
                                                      String key_type,
                                                      int key_size,
                                                      String prefix,
                                                      boolean unicode,
                                                      boolean html)

Parameters:

dgst_raw - the data to be visualized, recommend 64 bytes or less

key_type - output in the first line, recommend 6 chars or less

key_size - output in the first line

prefix - if non-null, prepend to every line

main

public static void main(String[] args)