wikipedia resume the situation and give this deifinition : In computer graphics, ray tracing is a technique for generating an image by tracing the path of light through pixels in an image plane

I was actually looking for a tutorial about ray tracing in C but i didn’t founded yet, it’s why i’m going to writte a little tutorial about it here
in a few days !

If you have some example of ray tracing in C you can also send them to me by email or in comment.

Thanks

and the new BIG visible update from this  beta 3
are the new templates,skins

Application -> get templates/skins …

Or  “personas” on firefox ! 
you can get it here https://addons.mozilla.org/fr/firefox/addon/10900

Social Engineering is for me, one of the best ways to get informations about people !
but what is it ?

Social engineering cannot be describe without talking about Kevin Mitnick   http://en.wikipedia.org/wiki/Kevin_Mitnick
It’s the art of talking to someone and obtain informations or acces to something.

Yesterday i went to see someone to the hospital … i wanted to know about his state before going to see him, i went to the doctors room and asked them
some informations about Mr X …  they just asked me if i was from the family … and ABSOLUTLY NOT !
I talked 10 minutes with the doctor and got a copy of the admission documents from Mister X …. it was so easy !
I gave all those documents to Mr X … he was happy to get is own admission documents.

People are weakneses for other people ….

Another example can be, I want to get some informations about a company  ( This is totally factice ! )
The first part of my job will be
1# analyse employees
2# analyse Directors
3# Keep everything in mind about them

Imagine a Company  called  XYZ  i need informations for a client !

First day :
I analyse Directors … where are they living ?, Which kind of Hobbies ? Wifie ? Single ? Childs ?
I’ll do that until i know everything !

Next Days :
Employee analyse ( i’ll do the same )

Bob, Alice, Jhon

Bob … is single … he likes money and wives … he drink alone in a pub after work … bob has an important job in this company …
Alice … Has a child  … this child is sick … she need money to help her child …. but she is only cleaner in the company
Jhon … has everything he need !

… as you can see  we are going to choose hour targets Bob and Alice !

Next Morning …. Bob will meed a beautifull wife in the pub … bob .. will fall in love … and she will present us to bob …
Her friends … and Bob will listen to us by love to his new girlfriend … ( this part can take a month ! )

Next Moring we will wait Alice … and ask her documents who are in the trashbins against money !
each important documents can be paid from 10$ until  200$ ( we will insist on the Sick point from her child )

This can be a nice social engineering work !
there are many ways to use social engineering !

software is actually not free ! but there is 30 days free trial test

I’ll paste here the Wikipedia Page !

Jaikoz is a Java program used for editing and mass tagging music file tags. Jaikoz performs acoustic fingerprint matching and metadata lookups. Accuracy is determined by the completeness of the database being used and the quality of the recording. Jaikoz uses the MusicBrainz service. It generates fingerprints (MusicIP’s MusicDNS PUIDs) of your files and compares them with the data from the MusicBrainz server.

Additionally Jaikoz matching algorithm compares the metadata files to each other, and performs an analysis on the sameness of values. If sufficiently similar, the values are changed to the most popular value. This mechanism allows automatic correction of typos. For example, if there were fifty records with the artist name “The Beatles” and ten with the artist name “The Beetles,” the sameness of the two values would indicate they were the same and all values would be modified to the most popular (the correct) value “The Beatles”.

Jaikoz is commercially licensed software, written in Java 1.5 by Paul Taylor. A shareware version, in which changes can only be saved to 20 files during one use, is also available as a 30-day free trial. 10% of every sale is paid to Metabrainz to support Musicbrainz development

the software is actually nice !

http://www.jthink.net/jaikoz

1# Variables Name

- The variables names have to be readable !
If you are programming in a 10 programmers team … giving names like
x=1; y=0;

why ?
imagine the next programmer who have to read again your work !

- Don’t give names with prefixes like
Imagine this in your program


int iCount=0;
double dPersonal=1;


Why?
Because, if you use Eclipse or any other completion program you’ll have all the variables name with de prefix …
and you waste time to search your variable !

- Use nice names
Imagine a code like this one

int dmy;
int smh;


Why?
because nobody knows the signification !
Day Month Year = dym … Wtf ?
it’ll be better to use DayMonthYear;
and SecondMinutHour; to give names for your variables !
it’s actually a little bit longer but … when people are reading you’r programming part … they just understand everything

- Dont Make jokes in your code !
why?
Only people who have the same humour as you will understand what you’r speaking about !
all the other people … will waste time on you’r coding part !

2# Classes

- Class length ?
The length of a class has to be short !
the “good” length of a class is 40 lines …( this is theoretical a thing )

3# Functions / Methods

- Function Length ?
We have to remeber that a function has also to be short !

- A function as only one function ?
this is very important !!
A function have to have only one function …
you cannot make a lot of things in a function

i don’t have any examples yet … but i’ll show more later here !

I was reading a book when i found this little commands for linux about connexion ( it can be helpfull for administrators )

Commands :

who : show the connected users : Linux/Mac
last : show last connexion (passed ) : Linux / Mac
lastb : show last connexion (failed) : Linux


Files


/etc/passwd : local users
/etc/group : local groups
/etc/log/wtmp : binary file with all connexion log ( Only Linux )
/var/log/utmp : binray file with all user actually connected ( Only Linux)
/var/log/btmp : Binary file with all failed connexion ( Only Linux )



I’m agdlp IT student,
i’ll speak here about security,linux,java,… and lot of other it subjects.

I hope you’ll enjoy it

Agdlp.