Diego Leal diegolealco

Cryptographic Best Practices

Putting cryptographic primitives together is a lot like putting a jigsaw puzzle together, where all the pieces are cut exactly the same way, but there is only one correct solution. Thankfully, there are some projects out there that are working hard to make sure developers are getting it right.

The following advice comes from years of research from leading security researchers, developers, and cryptographers. This Gist was [forked from Thomas Ptacek's Gist][1] to be more readable. Additions have been added from

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

	javascript:(function() {

	function copyToClipboard(text) {
	if (window.clipboardData && window.clipboardData.setData) {
	/IE specific code path to prevent textarea being shown while dialog is visible./
	return clipboardData.setData("Text", text);

	} else if (document.queryCommandSupported && document.queryCommandSupported("copy")) {
	var textarea = document.createElement("textarea");
	textarea.textContent = text;