“How can beginners start a career in cybersecurity and build a successful business in this field?”

*I am completely new to the technical field, but I aspire to achieve something significant in the field of cybersecurity, like starting my own venture. However, I am unsure about where to begin, how to develop the necessary skills, and how to proceed further.

CSRF Protection with codeigniter

I have very little knowledge in application security. I have often seen to protect your application from csrf attacks developers use tokens and pass these tokens with request to validate. I want to know if i just validate the request is coming from my server and rejects all requests coming from any other server how can it be unsafe?

Authentication Systems – Separate for Management?

Edit: I admit to being unclear when I first wrote the question. I suppose I wasn’t sure of the issue myself, the comments and answers provided up to now helped me focus on the issue, thank you to all involved. This edit is a total rewrite of the question.
End editorial comment

What is the rationale behind entering email twice for registration? [duplicate]

This question already has answers here: What is the purpose of “re-type your email” field? [closed] (3 answers) Closed 10 years ago. Many web sites ask users to enter their email address twice, sometimes taking the trouble to disable copy-pasting. What is the logic behind this? Is this e.g. a security measure? web-applications security ui […]

How important is an SSL certificate for a website?

I’m bootstrapping my own project, it has a registration/login area (via devise with RoR, properly hashed and salted of course). As I’m using subdomains and I need to access them with iframes (it’s justified, really!) I’d need one of those expensive certificates that cover subdomains.

What is the logic behind filtering/sanitizing input?

I have always found it more logic to validate input instead of filtering it. How to appropriately filter data depends on the situation, so IMO it should be done in output or when saving to a database.

User management data – the need for a username and password

I would have this asked on StackOverflow if it had code, but it’s more on the idea/concept so I asked here.

Saving Passwords To The Local Device

So In my app (iOS), you have to register in order to use the service (a food service). But in order to change details about your account (username, password, and email), you have to reenter your password. Except for if the user logged out, this is the only time you need your password to use the app. So I was wondering, since the user basically never uses their password, and its likely they would forget it the one time they might need it, is it ok if I store their password to their local device (in NSUserDefaults)?

How do CDNs protect failover sites from DDoS attacks?

I’m in the design process for a Java web app that I will probably end up deploying to Google App Engine (GAE). The nice thing about GAE is that I really don’t have to worry about fortifying my app from the dreaded DDoS attack – I just specify a “billing ceiling”, and if my traffic peaks up to this ceiling (DDoS or otherwise), GAE will just shut my app down. In other words, GAE will essentially scale to any amount until you simply can’t afford to keep the app running any longer.

why control + alt + delete couldn’t be intercepted by any application

The secure attention key is designed to make login spoofing impossible, as the kernel will suspend any program, including those masquerading as the computer’s login process, before starting a trustable login operation.