--Originally published at Merino is talking about security.
this isnt't allowed either:
this is allowed:
SEO test
this isnt't allowed either:
this is allowed:
this isnt't allowed either:
this is allowed:
SEO test
--Originally published at Merino is talking about security.
this isnt't allowed either:
this is allowed:
Computer Virus Protection
--Originally published at Sebastian Luna
Virus Protection
Conceptual Overview
Imagine having contact with many human beings, getting certain level of connection with every single one of them, every single day of your life. You can imagine that, eventually, you will get sick if you don’t have some precautions (washing your hands, getting your vaccines, keeping your distance, etc.).
When computers interact with other computers, some of them can have a Computer Virus, so they too can get infected, just like us! (sort of).
A Computer Virus is software with malicious intent that replicates itself by modifying other computer programs and inserting its own code. There are many methods in which a computer can get a virus, and there are different Computer Viruses that can have different negative effects on a computer, like accessing private information (your credit card too!), corrupting data (say goodbye to the pictures of your kids), spamming your e-mail contacts, or leaving your computer useless.
Available Methods
Some methods that can help you clean your computer from Viruses, or just to protect it against getting one are:
· Keep your software up to date
o Sometimes software has bugs that can be exploited by hackers, which could be used to infect your computer.
· Don’t click/respond to strange emails
o I’m sorry to tell you, but the Wife of the President of Uganda isn’t contacting you to give you 100 million dollars; you also didn’t win the Bill Gate’s foundation for 50 billion dollars.
· Use an antivirus software
o It’s a program designed to detect and remove viruses from computers and other threats.
· Use a Firewall
o A system designed to prevent unauthorize access to or from a private network.
· Download only from verified places
Computer Virus Protection
--Originally published at Sebastian Luna
Virus Protection
Conceptual Overview
Imagine
having contact with many human beings, getting certain level of connection with
every single one of them, every single day of your life. You can imagine that,
eventually, you will get sick if you don’t have some precautions (washing your
hands, getting your vaccines, keeping your distance, etc.).
When
computers interact with other computers, some of them can have a Computer
Virus, so they too can get infected, just like us! (sort of).
A Computer
Virus is software with malicious intent that replicates itself by modifying
other computer programs and inserting its own code. There are many methods in
which a computer can get a virus, and there are different Computer Viruses that
can have different negative effects on a computer, like accessing private information
(your credit card too!), corrupting data (say goodbye to the pictures of your
kids), spamming your e-mail contacts, or leaving your computer useless.
Available Methods
Some
methods that can help you clean your computer from Viruses, or just to protect
it against getting one are:
·
Keep
your software up to date
o
Sometimes
software has bugs that can be exploited by hackers, which could be used to
infect your computer.
·
Don’t
click/respond to strange emails
o
I’m
sorry to tell you, but the Wife of the President of Uganda isn’t contacting you
to give you 100 million dollars; you also didn’t win the Bill Gate’s foundation
for 50 billion dollars.
·
Use
an antivirus software
o
It’s
a program designed to detect and remove viruses from computers and other
threats.
·
Use
a Firewall
o
A
system designed to prevent unauthorize access to or from a private network.
·
Download
only from verified places
PROBLEM: Interval of Times
--Originally published at Sebastian Luna
The problem
Your company built an in-house calendar tool called HiCal. You want to addd a feature to see the times in a day when everyone is available.
To do this, you’ll need to know when any team is having a meeting. In HiCal, a meeting is stored as an instance of a Meeting structure with integer member variables startTime and endTime. These integers represent the number of 30-minute blocks past 9:00am.
typedefstruct{
unsignedstartTime;
unsignedendTime;
}Meeting;
For example:
typedefstruct{
unsignedstartTime;
unsignedendTime;
}Meeting;
Meeting meeting1 ={2,3}; // meeting from 10:00 – 10:30 am
Meeting meeting2 ={6,9}; // meeting from 12:00 – 1:30 pm
Write a function mergeRanges() that takes an array of meeting time ranges and returns an array of condensed ranges.
For example, given:
[{0,1},{3,5},{4,8},{10,12},{9,10}]
Your function would return:
[{0,1},{3,8},{9,12}]
Do not assume the meetings are in order.The meeting times are coming from multiple teams.
Write a solution that's efficient even when we can't put a nice upper bound on the numbers representing our time ranges. Here we've simplified our times down to the number of 30-minute slots past 9:00 am. But we want the function to work even for very large numbers, like Unix timestamps. In any case, the spirit of the challenge is to merge meetings where startTime and endTime don't 
Continue reading "PROBLEM: Interval of Times"
PROBLEM: Interval of Times
--Originally published at Sebastian Luna
The
problem
Your
company built an in-house calendar tool called HiCal. You want to
addd a feature to see the times in a day when everyone is available.
To
do this, you’ll need to know when any team is having a meeting. In
HiCal, a meeting is stored as an instance of a Meeting structure with
integer member variables startTime and endTime. These integers
represent the number of 30-minute blocks past 9:00am.
typedef
struct
{
unsigned
startTime;
unsigned
endTime;
}
Meeting;
For
example:
typedef
struct
{
unsigned
startTime;
unsigned
endTime;
}
Meeting;
Meeting
meeting1 =
{2,
3};
//
meeting from 10:00 – 10:30 am
Meeting
meeting2 =
{6,
9};
//
meeting from 12:00 – 1:30 pm
Write
a function mergeRanges() that takes an array of meeting time ranges
and returns an array of condensed ranges.
For
example, given:
[{0,
1},
{3,
5},
{4,
8},
{10,
12},
{9,
10}]
Your
function would return:
[{0,
1},
{3,
8},
{9,
12}]
Do
not assume the meetings are in order.
The meeting times are coming from multiple teams.
Write
a solution that's efficient even when we can't put a nice upper bound
on the numbers representing our time ranges.
Here we've simplified our times down to the number of 30-minute slots
past 9:00 am. But we want the function to work even for very large
numbers, like Unix timestamps. In any case, the spirit of the
challenge is to merge meetings where startTime and endTime don't 
Continue reading "PROBLEM: Interval of Times"
How to get a job in Computer Science
--Originally published at Sebastian Luna
- Buy the book: Cracking the Coding Interview
- Memorize every problem and its solution
- Go to an interview
- Play dumb when they give you a problem you already know
- Give the solution
You like to solve problems without having memorized solutions? You enjoy thinking about the problem and finding out different solutions? You want to show your real skills even if that means not being able to solve a given problem?
Some of us do, but that's not how the cool kids do it nowadays...
congratulations, you're hired
CATFISHING
--Originally published at Tc2017-security
Catfishing is when in social media they steal an identity and fake they are someone else. A lot of people have been victims of this people. Some of them have been lucky and found out, before getting hurt, but there are others not so lucky that have fallen in the lies of this people. There are cases where the victim falls in love with ths people and has given them money, or even worse been kidnap. We have to take precaucions and don’t accept or be fooled by any user you don’t know. If you don’t know the user don’t give any of your personal information. In your profil make sure everything is private or that the information you are displaying is alright for you.
Here is an example:
Y4PT
--Originally published at Tc2017-security
Two weeks ago I came back from a hackaton in Dubai due a competition we won last october(the prize was participate into the Dubai’s Mobility Hackaton by Youth For Public Transport). We flew 24 hours from Guadalajara to the event, then we were developing our product(business model, prototype, slides, pitch) and we presented the project to some Dubai’s authorities such as the Dubai Prince, CEO of Careem, CEO of RTA, head of Y4PT among others. Our project was a virtual assistante to move through the city in a clean, fast and sustuinable way, with this we won the 3rd place. It was such an amazing experience to meet people from around the globe and share ideas and see different ways of thinking about the global problems we are living in. After this we presented the project in an expo, in the Dubai World Tarde Centre for a couple of days. It was great to have won a price, but it is more important to me the experience, the possibility to aquire a new global vision and have fun with this amazing experience. We are looking forward to win the next edition of this event next year in Sweden!
Authentication
--Originally published at Computer and Information Security
Each day, we log into many different webpages, they ask for authentication. We need to prove that we are us, but why is it so important? Also, how does it works? Authentication is needed to access to personal information, social media, at work, unlocking the phone, anywhere. It is almost a requisite to join every webpage to access to certain content. Regarding security, it is the way to block your information for the resto of the world. There are many different ways to prove that you are really you. Commonly, sites ask for a password, but they aren’t the only option. The next video uses interesting examples to explain the importance of authentication.
- Knowledge factors: sometimes, the service that is asking for authentication can ask for names, specific questions, PIN numbers, or the password itself. Those are known as knowledge factors.
- Possession factors: these are the ones that the user has in possession, such as ID cards, one-time password tokens, specific codes, or any artifact that can prove your authentication.
- Inherence factors: this authentication factor covers the biometrics of the user, such as fingerprint scans, facial recognition, voice recognition, retina scans, iris scans, between others.
A modern way to authenticate the user is its location depending on the cellphone. This also has to do within its device activity and many other complex factors. Nowadays, it is recommended to use at least two factor authentications at the time per each account. For example, it is possible to activate an account with password and with a pin provided by the service company via cellphone.
There are may authentication tools in the market. It is important to be secure and also to protect your personal information. It can be annoying to unlock the accounts with more than 1-factor-authentication, but sometimes it is necessary Continue reading "Authentication"
