AWS, Azure, GCP Certifications

Wat is function app, nd why we need to use.

Timing in IST

e mentioned hash function, and they will check, if it matches no. 2 above or not.... If it matches then remember TU will keep its private key as a secret but its public key will be known to everyone... So, in second step of verification telecom company will use no. 3 code of my digital certificate and they will decrypt it using public key of TU.... After doing this decryption they will check if output of this decryption matches to no. 2 code or not.... If it matches, then it is verified that it was really issued by TU and was not modified by anybody else.. Now understand, what happens if i modify any of these above 3 things in my digital certificate.... Suppose i can increase my marks [no.1 modified ]. I can also change the hash code as per the increased marks [no. 2 modified] Now to modify detail of no. 3, i need the private key of TU.... WHICH I DON'T HAVE.... ONLY TU WILL HAVE ITS PRIVATE KEY AS A SECRET.... so, i cannot modify no. 3.... I mean i can modify it but i would not know what to write there.... I wouldn't know what would be the output after encrypting my modified hash code with private key of TU bcz i don't have the private key.... So, this is how Cryptography works today.... And this is how digital signature works... I tried my best to explain you guys in the Simplest and easiest way i could... So, i hope you understood it... Even if u have any confusion in this topic then feel free ask me in the comment below.. So, Thanks for reading!! Keep learning, and be Curious 🙂🙂 And join our group/channel for more such articles about cyber security, ethical hacking and latest technology updates...

#what_is_digital_signature?? #How_digital_signature_works?? #Asymmetric_vs_Symmetric_Encryption #Digital_certificate?? I will explain everything here but... First let's understand Cryptography, if the same key is used to encrypt the data and to decrypt as well, then it is called symmetric encryption and key is called symmetric key...... For eg... Our normal home locking keys... But if one key is used to encrypt the data and another key to decrypt that data...or Vice-Versa.. Then it is called Asymmetric Encryption and keys are called Asymmetric keys [i.e. private and public keys] .... Suppose key1 is used to encrypt the data, then key2 will be used to decrypt that data.... But key2 can also be used to encrypt the data where key1 will decrypt that data.... Meaning data encrypted by key1 can ONLY be decrypted by key2 and data encrypted by key2 can ONLY be decrypted by key1, provided that key1 and key2 are the pair of asymmetric keys. Let me elaborate it further... So, let's suppose i want a secure communication with my friend. So, for that what i would do is.... I will encrypt the msg using key1 and send it to him/her.... so what s/he will do is.... S/he will use key2 for decrypting that msg.... So, here in this example: key1 is my private key and key2 is my public key. Again if my friend wants to send me a msg... Then what s/he will do is.... S/he will use key2 for encrypting the msg and will send it to me... And after receiving, i will decrypt it using key1.... So, in this case key2 is my friend's private key and key1 will be my friend's public key.... Though it depends on the condition and frame of reference, IN GENERAL you can understand private key as a key used to encrypt the data while the public key as a key used to decrypt the data. IN GENERAL OKEY.... Till now you understood about symmetric and asymmetric Cryptography. Now let's understand the digital signature and digital certificate..... But at first we need to know its necessity... Why do we need it..... We need it mainly for digital verification i.e. To verify whether a msg is really from an authenticated source or not... Like in many cases the msg might have be modified or altered by the hackers using man in the middle attack. So, concept of digital signature helps to verify the original sender of the msg or the original issuer of any document. But let me clear one misconception at first.... Digital certificate is NOT the scanned picture of any documents which many people might think. So, digital certificate Is the electronic document used to prove the ownership of the public key. Let's understand it by the example.... Suppose i completed my B.E. and TU [my University] gave my Marksheet in the form of digital certificate. So, what TU will do for that is... It will convert all of my details like name, symbol no, marks etc... In fact it will convert the whole data of my Marksheet into the hash code. AND UNDERSTAND ONE THING HASH IS A NON REVERSIBLE FUNCTION SO, ANY DATA PASSED THROUGH THE HASH FUNCTION CANNOT BE DECRYPTED. IT IS A ONE WAY FUNCTION. Now i was in the hash code, right?? So, after converting the whole data of my Marksheet into the hashcode.... NEXT STEP WHAT TU WILL IS.... IT WILL ENCRYPT THAT HASH CODE USING ITS PRIVATE KEY. SO, THIS PROCESS OF ENCRYPTING THE HASH CODE OF ANY CERTIFICATE DATA OR ANY IMP DATA, USING A PRIVATE KEY BY THE ORGANISATION IS CALLED DIGITAL SIGNATURE OR TO SIGN ANY CERTIFICATE DIGITALLY. Now TU will give me the DIGITAL CERTIFICATE of my Marksheet which will contain three things... [it will contain other details too but they are just additional, main are these 3 things] [1] Unencrypted plain data as it is in my Marksheet. [2] Hash code of data in the Marksheet along with the name of hash function used like md5, SHA ... Etc.. [3] Encrypted data of that Hash code which was encrypted using issuer's private key. Now suppose i applied for the job in Any Telecom company. And i will show my digital certificate. So, to verify it... What they will do is.... They will pass the details of no. 1 above through th

AWS' 2018 fastest growing services were the following: -> Amazon Athena, with a 68-percent compound annual growth rate (measured by dollars spent with 2nd Watch) versus a year ago) -> Amazon Elastic Container Service for Kubernetes at 53 percent -> Amazon MQ at 37 percent -> AWS OpsWorks at 23 percent -> Amazon EC2 Container Service at 21 percent -> Amazon SageMaker at 21 percent -> AWS Certificate Manager at 20 percent -> AWS Glue at 16 percent -> Amazon GuardDuty at 16 percent -> Amazon Macie at 15 percent Based on 2nd Watch usage, the most popular AWS services are: -> Amazon Virtual Private Cloud -> AWS Data Transfer -> Amazon Simple Storage Service -> Amazon DynamoDB -> Amazon Elastic Compute Cloud -> AWS Key Management Service -> AmazonCloudWatch -> Amazon Simple Notification Service -> Amazon Relational Database Service -> Amazon Route 53 -> Amazon Simple Queue Service -> AWS CloudTrail -> Amazon Simple Email Service

*AWS Interview Question* *Q1. What are the pricing models for EC2instances?* 1.On-demand 2.Reserved 3.Spot 4.Scheduled 5.Dedicated *Q2. What are the types of volumes for EC2 instances?* 1.Instance store volumes 2.EBS – Elastic Block Stores *Q3.What are EBS volumes?* EBS stands for Elastic Block Stores. They are persistent volumes that you can attach to the instances. With EBS volumes, your data will be preserved even when you stop your instances, unlike your instance store volumes where the data is deleted when you stop the instances. *Q4.What are the types of volumes in EBS?* 1.General purpose 2.Provisioned IOPS 3.Magnetic 4.Cold HDD 5.Throughput optimized

What is a difference between owner,contributor and reader? 📌 *ONWER:* The Owner access gives complete control to the resources within the subscription. 📌 *CONTRIBUTOR:* Contributor access is similar to owner except that the user cannot assign access to others. 📌 *READER:* The Reader access role allows a user to view all the resources within the tenant. What is an Azure resource? In Azure, the term resource refers to an entity managed by Azure. For example, virtual machines, virtual networks, and storage accounts are all referred to as Azure resources. What is an Azure resource group? Each resource in Azure must belong to a resource group. A resource group is simply a logical construct that groups multiple resources together so they can be managed as a single entity. For example, resources that share a similar lifecycle, such as the resources for an n-tier application may be created or deleted as a group. What is an Azure subscription? An Azure subscription is similar to a resource group in that it's a logical construct that groups together resource groups and their resources. However, an Azure subscription is also associated with the controls used by Azure Resource Manager.

While copying files👆👆👆😜

*Azure Interview Questions* Q1.What are the main functions of the Azure Cloud Service? 📌It is designed to host the running application and at the same time manage the background running application. 📌The application of web processing is termed as “web role” whereas the background processing is termed as the “worker role”. Q2.What do you mean by roles? Roles in cloud management are often termed to be nothing servers that are linked to managing and balancing the platform as service machine that collaborates works to attain the goal. Q3.What are the different types of roles? 📌 *Web Role* that is used to deploy website by making use of language which is supported by the IIS platform customized to run the web application. 📌 *VM Role* is used to schedule the window services and task. It is done by the user through customization of the machine on which the worker’s role is running. 📌 *Worker Role* is to execute the process that runs in the background by deploying the website