Posts

How to know if a user is blocked on Whatsapp?

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  Curious to know if a user is blocked on Whatsapp? I am here to spark you curiosity from a tech perspective. Well there are some hacks in place  However.... Here we are going to figure it out from a technical perspective. The below steps are for the Android users. 1. Click on the profile icon of the contact 2.    Click on the 3 dots on the right top corner and click on Verify security code 3. WhatsApp automatically verifies security codes through a process called key transparency.  If the contact has blocked you, end-to-end encryption will not work automatically.  Now lets understand it why it happens... What is a security code in Whatsapp? 1. A security code is usually displayed as a 60-digit number or in the form of a QR code to ensure that the chats are encrypted. 2. No 2 security codes are the same. Every 60-digit number is unique . 3. When someone blocks you on Whatsapp or the other way around, there is no handshake possible. Whatsapp revokes ...

Essential ingredients to be a good team player

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Ever wondered what it takes to be a good TEAM PLAYER ? I will be sharing my perspective based on what it takes to be a good team player and building leadership skills based on the limited however diverse experience I had so far be it working on collaborative projects and community events. Let's get started! -- Efficient Communication      A good communication between the team solves most of the conflicts and differences of opinions. It is not just about your ability to express your thoughts with clarity in a good tone and pitch but also the fact that how the other person receives it. This is what brings us to the pointer how important is EMPATHY. Bring out the best out of the other person is what will make you a LEADER if you have deeply inculcated an empathetic approach towards all team members.  It is also the responsibility of the other team member to take ownership and develop a spirit of collaboration and mutual understanding rather than competing against one a...

How to download a local copy of a selected directory/folder of a GitHub repository?

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Ever came across a situation where you only needed a local copy of a selected directory or folder and NOT the entire project directory? Or may be a few files from a very large GitHub repository... Well! I faced this issue recently while working on my final year UG project. Lets revise the basics... To clone a GitHub repository git clone <github-repository-name> The same logic will not work for project directory link using git clone      https://download-directory.github.io/  has got you covered.  Just paste the required link in the search bar and the download will start automatically.

Detecting Spam/Fraud mail

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There are various measures by which fraud mails can be detected. Before that, lets me brief out a little about Digital S ignatures . A digital signature is a mathematical technique used to validate the authenticity and integrity of a digital document, message or software. It's the digital equivalent of a handwritten signature or stamped seal, but it offers far more inherent security. It is based on public key cryptography . Asymmetric  algorithms like RSA are used for digital signatures. A digital signature is intended to solve the problem of tampering and impersonation in digital communications. With reference to the image, the email address of the sender is same however one of them is a fraud and the other is the genuine mail. I was exploring both the instances and then figured out that a genuine mail will always contain a digital signature which provides authenticity and timestamp of the document or message sent by the  sender. The fraudulent mail does not contain the digi...

How will you prove that 0! =1?

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So it all started while I was attending my professor's math lectures in college one fine day. The topic was Permutations and Combinations and the basics start from knowledge about factorials.So we already know 1!=1, 2!=2, 3!=6 and so on... said my professor. Then he asked then what is 0! and does it really exists or not?? We all answered in excitement yes it exists and is equal to 1. Then can you prove it . He argued. We were speechless. I told that its a convention adopted as per the definition of factorial that is defined over set of natural numbers. He was not quite impressed with my response. In a flash of memory I remembered some properties of factorials. n!=n*(n-1)! I simply tried assuming the LHS of the expression as shown below LHS = n! - (n-1)! and Substitute n=1. LHS becomes 1!-0!  Save that . I simultaneosuly tried simplifying LHS to obtain RHS and substituted again n=1 RHS= (n-1)*(n-1)!                         ...