old paris cartier watch

discount cartier watches encino

cheap brand handbags

burberry beaton replica berry

burberry watches toronto

louis vuitton fake watches

miu miu handbag sale

lawsuits against replica purses

Discount Handbags Wholesale

Herve Leger Pink Scoopneck Tank Dress

authentic designer handbags for sale

my nice bags replica handbags

kippy handbags belts wholesale replica

ed hardy knockoff purses replica

guchy handbags

burberry ladies watches lizard strap

dolce replica bags

discounted designer handbags

loius replica handbags

cromia handbags

high quality replica designer handbag

lime green coach replica

replica handbags and purses

wholesale designer replica sunglasses

chanel ultra ceramic ring replica

cheap designer jeans

are renato watches worth the money

miu miu

Moncler Smart Casual Vest Dark Blue

replica knockoffs fake handbags

replica balenciaga flat clutch

designer replica clothing

rosemary handbags

Cheap Replica Handbags

wholesale designer handbag suppliers

Herve Leger Blue & Black Corset Dress

leather replica handbag

replica louis vuitton epi

heritage clothing heritage handbags queensland

wittnauer watches cartier lookalike

Moncler RENTILLY Jacket for Men

resell value for cartier roadster watch

tivoli radios other clock radios review

chanel replica handbags made in china

christopher kon handbags

where to repair cartier watch

henriettas handbags

replica coach keychain terrier

Cartier Red Shoulder Bag

backpack watches

Prada Golden Fringe Handbag

louis vuitton replica denim handbags

pc on timer clock boot

thomas wylde replica bags

Designer Imitation Replica

designer handbags online shopping

replica gucci glasses

decals for replica gas pumps

wholesale designer alternative handbags

coco chanel replica sunglasses

replica brighton handbag

reviews of burberry watches

replica handbags paypal discover

luxury replica handbags

wholesale unique handbags

designer replica wedding dresses

replica handbags under 15.00

replica handbags e business

louis vuitton shearling replica

gucci replica dog collar

leather replica handbags

the best chanel replica sunglasses

replica spy bag

handbag replica louis vuitton

replica chanel belly button rings

replica louis vuitton cheris

pietro alessandro handbags

wholesale channel replica purses

cartier ladies tank watch

Salvatore Ferragamo Yellow Varina Ballet Shoes

brand handbags name replica

cartier watch authorized seller

cartier tank solo watch

replica louis vuitton purses

Quality Designer Replica Replica

dior replica handbag

louis vuitton cruise collection replica

Louis Vuitton Monogram Multicolore White Noe

handmade designer bags

men fendi watches discount

cartier la do a watch

handbags online shop

replica designer handbags cubic jewelry

white handbags

wholesale replica handbags from australia

china replica purse

replica handbags francis tse

money for old watches

ila of california handbags

coach handbag replica

bags made in china

Hermes Azure Kelly Bag

Chloe Red Handbag

tcx boots tcs evo replica rs

best watches

versace watches for sale

handbag handles

replica watches jewelry iwc cartier omega

replica purses cheap

Louis Vuitton Monogram Multicolore White Judy MM

replica gucci signoria

cheap shoulder bags

replica pump repair

wholesale paper bags

wholesale list

Gucci Apricot Monogram Hobo

free designer handbags

vintage gucci watches

shoes louis vuitton

zebra handbags

replica chanel bags

handbags vuitton replica

replica coach ring

gucci hysteria python replica

louis vuitton stainless st black watches

louis vuitton man bag

mark nason handbags

replica louis vuitton watercolor hand bags

discounted designer handbags

stiles cat clock business card holder

handbags

louis vuitton replica handbag under 60.00

Prada Leather Handbags

handbag wholesalers

j12 chanel replica

Discount Handbags And Purses

versace black ceramic watches

mens louis vuitton shoes

replica designer handbags under thirty dollars

authentic fendi handbags

Designer Knock Off Handbags Wholesale

Herve Leger Dark Green Front Zip Dress

cartier women's tank watch

louis vuitton high quality replica

Louis Vuitton Designer Handbags Fendi Handbag

turnkey website replica handbags

purse replica supplier wholesale

louis vuitton replica handbag spring

replica chloe diamante

Gucci Leather Replica

louis vuitton denim replica

tapestry handbags

cheap replicas handbags

fleur de lis replica purse wholesale

cartier watches tonneau watch

gucci replica shoes dropshippers

replica coach poppy handbags

laurel burch handbags

replica marc jacobs bag white

designer handbags from china

knockoff replica handbags

cartier santos vendome watches

Fashion Replica

cartier replica ballou watch

black handbags

cartier tank stainless steel watch

lucky brand patchwork handbags

fendi shoes

china cartier watch

cartier watches dealer in stevenage

chanel ceramic watches

ferragamo handbags

exclusive gucci watches

Tapestry Handbags Wholesale

choo handbag jimmy replica

replica designer belt

replica handbags mulberry style

replica handbags gucci horseback

designer replica sunglasses and handbags

Brighton Replica Shopping

clock purse kmart

designer replica handbag supplier

replica sa handbags

discount shoes

louis vuitton daimer canvas replica

dolce and gabbana handbags

cheap china wholesale

dolce gabbana replica purse

dooney bourke replica purses

replica holiday signature coach purses

Clothing Replica

shop watches shoes golf clothes

Authentic Designer Handbags

Wholesale Fashion Replica

knockoffs handbags replica jewelry tiffany jewelry

harvey's seatbelt handbags

mulberry replica

copyright laws replica bags

replica chloe handbags betty

coach designer watches

replica handbags gucci knokoffs

gucci watches with roman numerals

fiorelli handbags

fleur de lis handbags

authentic designer handbags for less

gucci leather cuff watches

wholesale purses and wallets

Straw Handbags China Wholesale

high quality replica watch cartier tank

louis vuitton replica purse wholesale

tokidoki handbags

cartier quartz must de tank watch

ourprice retailprice yoursavings cartier watches

louis vuitton womens shoes

santos cartier 100 watch

fake designer handbags

fashion jewellery

handbags china

Yves Saint Laurent Silver Tribtoo Platform Slingbacks

replica handbags china

goyard replica handbags

Louis Vuitton Damier Ebene Canvas Sneakers

burberry replica handbags

handbag designer replica

wholesale designer bags china

Thomas Wylde Black Tassel Bag

designer outlet

prada replica bags

replica versace men's belt

wholesale fashion jewellery

rare replica coach handbags

cartier ladies vlc watch

good replica handbags

replica desinger purses

Prada Fendi And Gucci Handbags

michael kors replica nude ballet flats

authentic luxury designer handbags

kooba bag replica

replica handbag buyer

wholesale suitcases

santos de cartier square travel clock

marino orlandi handbags

mc handbags wholesale

replica cartier moon

chanel bag online

Brand Handbags Name Wholesale

chanel red replica bag

coach blue patchwork replica fake mirror

coach optic signature baby bag replica

christian dior replica

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
03 606 03

6220 Nokia руководство по ремонту кузова volvo xc70 руководство
эффективность руководства
mazda 626 руководство iveco daily руководство по ремонту

Starline 9 айпад руководство пользователя руководство по качеству смк
Pentax K 5 caldina руководство по ремонту скачать
театр под руководством спесивцева
руководство по эксплуатации бк hp pavilion dv9000 руководство
Htc Touch 2 руководство по заработку в интернете peugeot expert руководство
руководство по эксплуатации passat b6
Panasonic Kx Tg7225ru
Hp 1120
руководство по ремонту yamaha

Lg 32le5500 классное руководство в коррекционной школе
Www Yo Yo Ru
Lg Dks 9500h peugeot руководство
Z610i авторитетный стиль руководства kia picanto руководство скачать
15 руководство по эксплуатации снегохода brp


Jaguar 087dw зу 90 руководство по эксплуатации asus k50ij руководство
Starline Twage A9
Kx Tg1401ru руководство по ремонту hyundai getz asus wl 520gc руководство
Lego Star Wars
6500 руководство первая грузовая компания национальные руководства по медицине


Sony Cdx Gt317ee руководство по ремонту лансер 9 nexia руководство по эксплуатации скачать

cisco руководство illustrator cs5 руководство
Chevrolet Lanos руководство по ремонту ваз руководство по эксплуатации навигатора
руководство пользователя archicad руководство toyota probox
Nikon D70 первое сентября классное руководство
руководство по ремонту ауди80
руководство по ремонту лансер руководство skoda yeti
2 08.212 1 руководство по эксплуатации daewoo
Korg Pa 500 руководство пользователя centurion
руководства по программам
hyundai elantra руководство по ремонту осаго тарифное руководство
100 руководство по ремонту s80
Samsung Wep350 руководство медицинского представителя фармацевтической компании руководство по ультразвуковой диагностике
Panasonic Kx Mb2000 lifan breez руководство скачать руководство по эксплуатации s80
роль руководства в смк руководство по openoffice скачать

руководство для врачей скорой помощи
руководство пользователя tomahawk tw 9010
Kgb Vs 400 руководство опель астра h
Rvi ваз 2105 руководство скачать руководство для мужчин
5800 руководство пользователя руководство по ремонту ситроен с8
руководство по ремонту автобуса
Panasonic Kx Tcd450 национальное руководство купить
rexton руководство по ремонту скачать rezzo руководство по эксплуатации
Nokia 6110 пежо 407 руководство по ремонту
Lg Kf301 руководство microsoft office access руководство форд фокус 2
toyota caldina руководство по ремонту
Kh 1171
Bios руководство по ремонту фиат руководство по эксплуатации радиостанции
ваз 2111 мультимедийное руководство руководство по эксплуатации уаз 31519
руководство пользователя excel скачать камаз руководство по эксплуатации
115 руководство по ремонту автомобиля хонда
Lg Tcc 5620 швейная машинка чайка руководство
руководство по эксплуатации ниссан марч руководство по ремонту ducato
4 руководство по сексу с собакой
Pioneer 6000ub руководство по мастурбации скачать
ubuntu руководство пользователя
руководство по ремонту мотоцикла иж руководство по ремонту лиаз
2109 руководство по эксплуатации ваз 21093i руководство ниссан марч скачать
Panasonic Kx Ft938 ваз2107 руководство по ремонту руководство по ремонту холодильников атлант
Olympus Vn 2100 руководство по эксплуатации corolla e12 скачать руководство toyota windom
150000
руководство по ремонту ауди 80 mercedes sprinter руководство по эксплуатации
Hp toyota prius руководство скачать
волга 3110 руководство по эксплуатации руководство по выживанию на пустошах
руководство по ремонту тойота камри
150 руководство по качеству определение доплата за классное руководство
Grundfos Upa 15 90 клиент серверный вариант руководство администратора
Kenwood Tk 150s
камаз 43118 руководство по эксплуатации скачать руководство escudo suzuki

кооперативная модель руководства
25 руководство к решению задач

Sharp Ar 5316 руководство по эксплуатации паз
ваз 2112 руководство по ремонту мерседес 140 руководство по ремонту
скачать руководство опель вектра б


1 руководство по эксплуатации лансер руководство пользователя розница

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 is /etc/shadow. It contains the password which has been encrypted with the salt, which is also in the shadow file.

contain of shadow file could be as follow:

luana:$1$TaORQ38u$Mfaih1b244CcesjU7Sj2T1:13975:0:99999:7:::

here, luana is the username

$1$ indicates we’re using a salt (TaORQ38u) and md5sum is being used to encrypt the key, $ signifies the beginning of the encrypted password (Mfaih1b244CcesjU7Sj2T1) and ends before :

2. Salt

salt is a string, publicly available (if you can see encrypted passwords you can see the salt), used to help with the password encryption process. Since encryption is a on-to function (or a surjection - see http://mathworld.wolfram.com/Surjection.html) two of the same words will encrypt to the same ciphertext. This means on a system with very large amount of user there will be a chance someone will use some very bad passwords (like “password” etc) and it will shows as two identical ciphertext in the shadow file.

Salt is mostly unique to each user. It is often the encryption of the time the user is added to the system (thus relatively unique for each user). This salt is mixed with the user password before we start the encryption. This means for any given two users it is extremely unlikely that they are BOTH added to the system at the same time and use the same password.

Simply put, salts allow the system to afford users to use the same passwords without having two identical encrypted passwords in its password file.

3. Note about writing programs on linux that uses crypt()

crypt is standard to most c/c++ compilers on linux system. This means you don’t even have to do #include <> in your program to use these functions.

Example program:

 #include <iostream>
int main()
{
std::cout<<crypt(”kccL;pw_d:”,”$1$TMVRB39B”);
return 0;
}

When compiled on linux system (with GNU cryptography library installed) you would run:

[lubox@neo 3]$ g++ hw3.cpp -o o -lcrypt

Notice the -lcrypt option at the end. This will tell the compiler that you are using crypt function.

The above program when run will yield output:

$1$TMVRB39B$PUaDAsZctLWtj0kteqvBe1

with the salt the same, and the password is encrypted into the preceding bold part.

4. …

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 three assignments . We go to computer lab to demonstrate your program. I will grade and return Thursday so you can review for your test.

Thursday April 3rd: Last class before your test. We will go over Chapter 5. Make sure you have your questions ready.

For COMP 3053

Your test will cover chapter 5 and 6 on the 8th of April.
Tuesday April 1st: You’re turning in Assignment 7
There will be an in-class assignment on this day so make sure you don’t miss class. This assignment is on your slide, about breadth-first and depth-first search.

On Thursday we will cover chapter 6 (Gaussian elimination, horner’s rule…)

Dr. R’s cellphone number:

1-281… you didn’t actually think I was going to put his cell phone on the internet, did you?

(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, to find a value or evaluate an expression anymore. In Advanced Calculus (senior level courses at most College and Universities in America) you will learn about series and sequences and their properties and more. You’d be exposed to thinking very very fine (small) and also accept values and concepts that is larger than the largest thing you know so far.

It’s a big leap in understanding and requires a mature mind capable of abstract thinking. After you master the basics of sequences, convergence… of Advanced Calculus you’d be ready for the next step that is beginning Analysis. Intro to Analysis is a course designed to bridge the gap from Undergraduate Mathematics to a Graduate level training in the field. It’s abstract, it’s hard, it’s fun, it’s not compact(!)… you either get it or you don’t sort of thing.

This writing is about a classical problem in analysis. It’s would be quite straightforward to some people while does not seem “logical.” Your common sense may work for you or against you in this case. Let’s see…

——————————————————————————————

There is this hotel called Hotel Infinity. It has infinitely many rooms. Each of these rooms already has a guest in it. Now a new guest arrive.

None of the guests at the hotel will share a room with anyone. And no one is leaving either.

So how do you accommodate the new comer? Or can you accomodate him at all?

Logically (common sense perhaps?) if every single room in the hotel is filled then we can say the hotel is full!  Meaning no more guests can be accommodated? Well but that’s the logic for a normal hotel, this is Hotel Infinity where we have infinitely many rooms remember? Having all the rooms filled and “NO VACANCY” is two very different thing here.
To accept this solution you must first accept that Hotel Infinity has infinitely many rooms. This IS the key. Infinitely many rooms means it WILL NEVER RUN OUT OF ROOMS (whether the newest room found has a guest in it or not).

To accommodate the new guest, you would tell the guest in room1 to move to room 2. Guest in room 2 move to room 3, room 3 move to room 4 and so on. You tell guest in room n to move to room number n+1 and son on. Because you have infinitely many rooms there will always be a room for everyone to move in to. By doing this you have just freed up room 1! Now just send the new guest to this room

Yes you just check a guest into a hotel where all the rooms are filled! Let your imagination roams

The problem is extended when Continue’Em Tours send there entire fleet of buses to your hotel. Their fleet has infinitely many buses each carrying infinitely many guests… You own Hotel Infinity, you can accommodate a lot (understatement) of people. But how do you accommodate Continu’Em Tours guests?

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 previous round so we write 8.

and so on.

But, why did we save 2 from 24?? When we first learn this multiplication at 5th grade I don’t think any of us ask this question. The reason is being you are working with decimals (base of 10). Meaning the digit 1 space to the left of the least significant bit (LSB) means how many 10s the value has. The digit 2 spaces to the left of the LSB means how many hundreds you have, and so on.

so for 1291 :

you have 1000 + 200 + 90 + 1

or simply, as agreed upon in base of 10, to be written as 1291.

Now, this is definitely not the only way to represent number! For some odd reason you would like to write 1291 in say.. base 5!

The answer is 20131
To verify you can see:

2*5^4 + 0*5^3 + 1*5^2 + 3*5 + 1*5^0
= 2*625 + 0*125 + 1*25 + 3*5 + 1
= 1291

Please take my word for it that this representation of 1291 decimal in base 5 is unique (it is). Now our question would be if the multiplication method we learned from 5th grade still work on number of a base other than 10? Let’s consider a small example of multiplying 29 x 67 (decimals).

29 (base 10) = 104 (base 5)
67 (base 10) = 232 (base 5)
.                         104
.                      x
.                         232
.           ————

Remember back in decimal everytime we have something larger than 10 (or the base) we do a carry out (or “save” or “remember”)? It is the same thing here. But instead of 10, everytime you have something larger than 5 you have to carry out 1 for each “5″ you have over.

so for 2 x 102:

2×4 = 8 write 3 carry 1
2×0 = 0 write 0 + 1 = 1
2×1 = 2 write 2

so for the first round we have

.           104
.          x
.           232
————-
.           213

Similarly for the other 2 operations we end up with this multiplication:

.           104
.          x
.           232
————-
.           213
.         322
.        213
————-
.        30233

For the final step of adding the 3 values together. When you add 2+2+3 this is 7 you write 2 (instead of 7) and carry 1 over to the next addition of 3+1. This becomes 3+1+1 = 5 so you write 0 and carry 1 over to the final addition of 2+0. For this last one 2+1 (carry out) = 3 you write 3.

This final value 30233 of base 5 corresponds to 1943 decimal. Which is indeed the product of 29 x 67 in base 10. :))

So there multiplication works with numbers of other bases also!