Oleg Andreev oleganza

What's this all about?

Digital cryptography! This is a subject I've been interested in since taking a class with Prof. Fred Schneider back in college. Articles pop up on Hacker News fairly often that pique my interest and this technique is the result of one of them.

Specifically, this is about Lamport signatures. There are many signature algorithms (ECDSA and RSA are the most commonly used) but Lamport signatures are unique because they are formed using a hash function. Many cryptographers believe that this makes them resistant to attacks made possible by quantum computers.

How does a Lamport Signature work?

	package main

	import (
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/sha256"
	"fmt"
	"math/big"
	)

	-----------

	Please try this:

	1. Quit Gitbox.
	2. Delete ~/Library/Preferences/com.oleganza.gitbox.plist
	3. Run in Terminal: defaults delete com.oleganza.gitbox
	4. Run in Terminal: git config --global push.default matching
	5. Open Gitbox.


	/*

	Oleg Andreev <[email protected]>
	January 25, 2011

	With NSNotificationCenter you post notifications with a name like MyNotification.
	Observer subscribes to this name with some selector like myNotification:

	To make things easier and less verbose, we won't declare notification names, but only the selectors.

	// Author: Oleg Andreev <[email protected]>
	// May 28, 2011
	// Do What The Fuck You Want Public License <http://www.wtfpl.net>

	#import "NSData+OADataHelpers.h"

	#if !__has_feature(objc_arc)
	#error ARC must be enabled!
	#endif

	#import "NSData+OADataHelpers.h"

	@implementation NSData (OADataHelpers)

	- (NSString*) UTF8String
	{
	return [[[NSString alloc] initWithData:[self dataByHealingUTF8Stream] encoding:NSUTF8StringEncoding] autorelease];
	}

	// Replaces all broken sequences by � character and returns NSData with valid UTF-8 bytes.

	require 'strscan'
	require 'cgi'

	module HTMLEscaper
	ENTITIES = {
	"<" => "<",
	">" => ">",
	'"' => """,
	'&' => "&"
	}