Cryptography: Symmetric vs Asymmetric Encryption

Before the modern age of cryptography, where the focus has expanded from the confidentiality of messages to encompass identity authentication, integrity checking, and more, the field mainly revolved around lexicographical and linguistic patterns.
With the addition of digital computers and the beginnings of the extensive use of mathematic theory and computer science practices in cryptography, the ability to “crack” complex encryption algorithms increased, but along with it, the speed at which increasingly complicated, computationally secure (albeit, theoretically breakable) encrypting mechanisms could be created.
Here, we’ll take a look at the two kinds of cryptosystems: symmetric and asymmetric.

#comparison #security #programming #encryption #cryptography

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Cryptography: Symmetric vs Asymmetric Encryption
Trystan  Doyle

Trystan Doyle

1598640120

Symmetric and Asymmetric Encryption in .NET Core

This post looks at symmetric and asymmetric encryption and how this could be implemented in .NET Core. Symmetric encryption is fast and can encrypt or decrypt large amounts of text, streams or file

#.net #.net core #asp.net core #asymmetric encryption #encryption #symmetric encryption

Cryptography: Symmetric vs Asymmetric Encryption

Before the modern age of cryptography, where the focus has expanded from the confidentiality of messages to encompass identity authentication, integrity checking, and more, the field mainly revolved around lexicographical and linguistic patterns.
With the addition of digital computers and the beginnings of the extensive use of mathematic theory and computer science practices in cryptography, the ability to “crack” complex encryption algorithms increased, but along with it, the speed at which increasingly complicated, computationally secure (albeit, theoretically breakable) encrypting mechanisms could be created.
Here, we’ll take a look at the two kinds of cryptosystems: symmetric and asymmetric.

#comparison #security #programming #encryption #cryptography

Autumn  Blick

Autumn Blick

1598839687

How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

  • Performance: It delivers optimal performance.
  • Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
  • UI design: React Native enables you to design simple and responsive UI for your mobile app.
  • 3rd party plugins: This framework supports 3rd party plugins.
  • Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

  • Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
  • Near-native user experience: React Native provides several native components, and these are platform agnostic.
  • The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

#android app #frontend #ios app #mobile app development #benefits of react native #is react native good for mobile app development #native vs #pros and cons of react native #react mobile development #react native development #react native experience #react native framework #react native ios vs android #react native pros and cons #react native vs android #react native vs native #react native vs native performance #react vs native #why react native #why use react native

PWA vs Native App: Which Is Better Option In 2021?

Every year, the world is expanding with the launch of new smartphones and other gadgets available in the market. According to Statista, more than 50% of the population will be using smartphones by the end of 2021.

Hence, businesses worldwide have understood the importance of smartphones and are joining the mobile industry by launching native apps.

Apart from native apps, progressive web apps is another technology that is gaining a lot of attention among businesses. Moreover, various leading companies worldwide have openly accepted PWA and built progressive web apps.

Now, the question arises, how is PWA different from the native apps? Read More

#pwa vs native #pwa vs native app #progressive web app vs native #progressive web app vs native app #pwa vs native app performance

Tamia  Walter

Tamia Walter

1593872280

E.U. Authorities Crack Encryption of Massive Criminal and Murder Network

Four-year investigation shuts down EncroChat and busts 746 alleged criminals for planning murders, selling drugs and laundering money.

European law-enforcement officials have shut down an encrypted Android-based communications platform used exclusively by criminals to plot murders, traffic illegal drugs, commit money laundering and plan other organized crimes.

An international law-enforcement team from the France and the Netherlands cracked the encryption of EncroChat, a secure mobile messaging service that was “one of the largest providers of encrypted communications,” according to the U.K.’s National Crime Agency (NCA).

U.K. officials had been investigating the platform and nefarious activities of the criminals using it since 2016 through Operation Venetic, working alongside international law-enforcement agencies to share technical expertise and intelligence.

Two months ago investigators in France and the Netherlands cracked the network’s encryption, allowing law enforcement to listen in to criminal communications about selling and trafficking drugs, laundering money and murdering rivals, authorities said.

“The infiltration of this command-and-control communication platform for the U.K.’s criminal marketplace is like having an inside person in every top organized crime group in the country,” NCA director of investigations Nikki Holland said in a statement. “This is the broadest- and deepest-ever U.K. operation into serious organized crime.

More than one murder was disrupted as a result, authorities said.

“A specialist NCA team, working closely with policing partners, has prevented rival gangs carrying out kidnappings and executions on the U.K.’s streets by successfully mitigating over 200 threats to life,” according to the NCA.

The resulting collaborative E.U. operation ended this week with 746 arrests, and the seizure of £54 million (US$67 million) in cash, 77 firearms and more than two tons of illegal drugs, according to the NCA. Police also seized more than 1,800 rounds of ammunition, upwards of 28 million Etizolam pills (street Valium) from an illicit laboratory, 55 “high-value cars” and 73 luxury watches, officials said.

Little is known about who is behind EncroChat, but officials said it was solely used by criminals to plan illegal activity. The service’s owners apparently became aware of the criminal investigation last month, informing an estimated 60,000 users with a message warning them to get rid of their EncroChat devices because their servers—operating out of France — had been “seized illegally by government entities,” according to the NCA.

The service relied on EncroChat devices, which came with pre-loaded apps for instant messaging as well as the ability to make secure internet calls, with no other “conventional smartphone” functionality, U.K. officials said. The devices cost about around £1,500 (US$1,872) for a six-month contract, which included a kill code that could wipe them remotely.

published report in Vice Motherboard extensively details how authorities cracked EncroChat’s encryption and intercepted criminal communications to take down a major communications pipeline for criminal activity.

Criminals describe EncroChat phones as modified Android devices, including some models that use “BQ Aquaris X2,” an Android handset released in 2018 by a Spanish electronics company, according to leaked documents cited in the report.

To turn the phones into secure messaging devices, Encrochat installed its own encrypted messaging programs onto the basic device. The service would remove the GPS, camera and microphone functionality from the device and route messages through Encrochat’s own servers to ensure secure communications, according to the report.

Unique to EncroChat device was a service that a user could execute using a PIN to wipe the device if it was compromised. Devices also could run two operating systems side by side to hide nefarious activities, according to the report. If a user wanted the device to appear like a typical smartphone, they could boot it into a regular Android OS. To use the encrypted service, they would switch the device over to the EncroChat system.

Purchasing an EncroChat phone also was not a straightforward affair, with criminals describing back-alley deals with otherwise legitimate vendors to procure devices, according to the report.

Once law enforcement cracked EncroChat’s encryption, investigators basically had an unobstructed view into the activities of organized criminals, who believed they were communicating securely only with their collaborators.

Messages intercepted by authorities outlined clearly how criminal gangs allegedly directed members to procure money from customers, how to launder it safely, where to hide drugs, and when and how murders against rivals would be committed, according to the report.

The resulting arrests spanned a number of E.U. countries and the U.K., with authorities currently detaining alleged criminals in the United Kingdom, the Netherlands, Norway, Spain and Sweden.

#cryptography #government #mobile security #privacy #android #criminal communications #criminals #encrochat #encrypted chat #encryption #european union #france #law enforcement #mobile #murder network #secure mobile messaging #the netherlands #u.k. national crime agency