atoponce

Cryptography, not cryptocurrency

Books

• Handbook of Applied Cryptography
• Serious Cryptography: A Practical Introduction to Modern Encryption
• Cryptography Engineering: Design Principles and Practical Applications

Resources

• Cryptopals Challenges
• CryptoHack Challenges

msafadieh

// ==UserScript==
// @name         Zoom Web Client Auto Redirect
// @namespace    https://zoom.us
// @version      0.1
// @description  Automatically redirect Zoom meetings to the web client
// @author       Mohamad Safadieh
// @license      GNU AGPLv3: https://www.gnu.org/licenses/agpl-3.0.en.html
// @include      /https:\/\/([a-z0-9\-]+\.)?zoom\.us\/([sj])\/([0-9]+).*/
// @grant        none
// ==/UserScript==

atoponce

Verifiable brute force strength

Below are table of various projects that can completely exhaust n-bits of keyspace. In other words, counting completely and fully from 0 to 2ⁿ-1.

This Gist implies no discussion about how this is relevant to quantum computing using Grover's algorithm, meet-in-the-middle or birthday attacks, or anything of the like. It's strictly a Gist about raw speed, measuring the result in bits.

If you know of other noteworthy and verifiable brute force searching projects,

ddevault

WAYLAND_PROTOCOLS=/usr/share/wayland-protocols

# wayland-scanner is a tool which generates C headers and rigging for Wayland
# protocols, which are specified in XML. wlroots requires you to rig these up
# to your build system yourself and provide them in the include path.
xdg-shell-protocol.h:
	wayland-scanner server-header \
		$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@

xdg-shell-protocol.c: xdg-shell-protocol.h

porglezomp

import Data.Vect

-- `minus` is saturating subtraction, so this works like we want it to
eq_max : (n, k : Nat) -> maximum k n = plus (n `minus` k) k
eq_max  n     Z    = rewrite minusZeroRight n in rewrite plusZeroRightNeutral n in Refl
eq_max  Z    (S _) = Refl
eq_max (S n) (S k) = rewrite sym $ plusSuccRightSucc (n `minus` k) k in rewrite eq_max n k in Refl

-- The type here says "the result is" padded to (maximum k n), and is padding plus the original
leftPad : (x : a) -> (n : Nat) -> (xs : Vect k a)

shafik

What is the Strict Aliasing Rule and Why do we care?

(OR Type Punning, Undefined Behavior and Alignment, Oh My!)

What is strict aliasing? First we will describe what is aliasing and then we can learn what being strict about it means.

In C and C++ aliasing has to do with what expression types we are allowed to access stored values through. In both C and C++ the standard specifies which expression types are allowed to alias which types. The compiler and optimizer are allowed to assume we follow the aliasing rules strictly, hence the term strict aliasing rule. If we attempt to access a value using a type not allowed it is classified as undefined behavior(UB). Once we have undefined behavior all bets are off, the results of our program are no longer reliable.

Unfortunately with strict aliasing violations, we will often obtain the results we expect, leaving the possibility the a future version of a compiler with a new optimization will break code we th

mortie

#include <stdlib.h>

/*
 * Defer an expression.
 * This requires a block in an outer scope to have called defer_init,
 * and the deferred statements will run once defer_run is called.
 */
#define defer(expr) \
	do { \
		__label__ _defer_label; \

ErikAugust

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#ifdef _MSC_VER
#include <intrin.h> /* for rdtscp and clflush */
#pragma optimize("gt",on)
#else
#include <x86intrin.h> /* for rdtscp and clflush */
#endif

haavard

This work, excluding the Arch Linux logo, is made available under CC0: https://creativecommons.org/publicdomain/zero/1.0/

kipusoep

--deletes in Document
--at this point all associated media files are deleted
delete from umbracoDomains where id in (select id from umbracoNode where path like '%-20%' and id!=-20);
delete from cmsDocument where nodeId in (select id from umbracoNode where path like '%-20%' and id!=-20);
 
--deletes in Content
delete from cmsPropertyData where contentNodeId in (select id from umbracoNode where path like '%-20%' and id!=-20);
delete from cmsPreviewXml where nodeId in (select id from umbracoNode where path like '%-20%' and id!=-20);
delete from cmsContentVersion where ContentId in (select id from umbracoNode where path like '%-20%' and id!=-20);
delete from cmsContentXml where NodeId in (select id from umbracoNode where path like '%-20%' and id!=-20);