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http://mi.lubox.net Mathematics, Data Encryption, Security, C++ Fri, 22 Apr 2011 12:35:18 +0000 http://backend.userland.com/rss092 en opel astra h руководство Sony Dsc S730 маз 53371 руководство по ремонту 5 10 руководство по эксплуатации тестера toyota lite ace руководство Panasonic руководство по эксплуатации ямаха руководство а6 теория стилей руководства лайкерта руководство по эксплуатации mmi audi Lg Gm360 руководство по программированию omron Prestigio Geovision 5200 Canon 580 Ex мультимедийное руководство по автомобилям ваз 03 ... http://mi.lubox.net/28 1. /etc/shadow On linux system user information are stored in /etc/passwd. This file is world-readable (readable by any user of the computer system, even nobody) So it is not a good idea to keep user passwords in it, even encrypted password. The need to store (encrypted) password introduces the shadow file, which ... http://mi.lubox.net/25 Your test will be on April the 8th, 2008. That is a week from today. For COMP 2103 the test will cover chapter 4.5, 4.6 and all of  5 (follow the SLIDE numbering, not the book). Tuesday April 1st: I will go over 4.5 and 4.6 (review). You will be turning in ... http://mi.lubox.net/21 (skip to the line break for the impatience) For Mathematic major, after you take all your Calculus and basic linear algebra you'd advance to Advanced Calculus. Advanced Calculus is quite a big leap from the "normal" mathematics you've been studying so far. Now you're not learning mathematics to solve an equation, ... http://mi.lubox.net/19 Consider: .              3128 .          x .              2123 .       ------------ (1)           9384 (2)         6256 (3)       3128 (4)     6256 .      ------------- .        6640744 This is 5th grade arithmetic. We all know how this multiplication works. Let's look at the first row (1). 3 times 8 = 24 we write 4 and "save" 2. 3 times 2 = 6 we dump the 2 saved from the ... http://mi.lubox.net/18 // bint.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <vector> #include <string> #include <iostream> typedef std::vector<int>::size_type v_sz; typedef std::vector<int>::iterator v_it; std::vector<int>& init(std::string, std::vector<int>&); void disp(std::vector<int>); std::vector<int>& add(std::vector<int>& result, std::vector<int> first, std::vector<int> second); struct bint { std::vector<int> v; }; int _tmain(int argc, _TCHAR* argv[]) { std::string my_string = "123721846239864913265023423414379271021143241878456849752984751203980982342354362945298754350986797698729874979274932796570698709809820983393811128749879179827548719879468709398347039284153495123102987394875989347581093803948335698273416710723469187623127630875629528641908475863465981761012037164873262576128767816543"; std::string p1 = "34288"; std::string p2 = "14129"; std::vector<int> m; std::vector<int> a,b; init(p1, a); init(p2, b); init(my_string, m); disp(a); disp(b); disp(m); std::cin.get(); return 0; } std::vector<int>& init(std::string ... http://mi.lubox.net/17 A common trouble from massive multiplayer online role playing game (MMORPG) is the "lag" that seems to always happen whenever there is a large concentration of player in the same area. Users complain endlessly about this issues, citing "there's no reason the service could be this bad, " or ranting ... http://mi.lubox.net/14 The other day I was talking to a friend of mine who is an art major. One way or another the topic of encryption came up. How I managed that is another story. This article, as I hope, will serve as an introduction to non-majors who has absolutely no exposure ... http://mi.lubox.net/6 Reading these: Network Infrastructure for Massively Distributed Games (free kill, to grease it up) Provably Secure Timed-Release Public Key Encryption (intermediate) and ADVANCED ENCRYPTION STANDARD (AES) :( (more of a battle than leisure reading) Full text attached for the interested parties. ..will report later. Right now feeling like: Attachments: Provably Secure Timed-Release Public Key Encryption Advanced Encryption Standard ... http://mi.lubox.net/9 Source coding There is a story about a student of information theory on his first day at college. He had entered a strange, bizarre world. The only sounds were the occasional calling out of a number by one of the professors, followed by laughter. One professor would say '52', there would ... http://mi.lubox.net/7