Tech Guru ~ samsung Galaxy S8 Review

Samsung has finally managed to leave its smartphone rivals far behind in the design segment. With the new Galaxy S8 flagships, the Korean tech giant has shown the world its prowess with respect to how smartphone technology can be powerful, and yet remain beautiful. Yes, the Samsung Galaxy S8 flagships are beautiful beasts. However, although they look pretty delicate, they are significantly tough. The S8 does show a great blend of beauty and power, and the Korean giant is showing the world a glimpse of how next generation smartphones could evolve.

If the Galaxy S7 was stunning in design then we're not exactly sure how to describe the Galaxy S8 apart from that it’s on another level. It makes its predecessor, and other phones, look rather dated.

Samsung has brought its edge screen technology to both phones this year so you don't need to buy the larger Galaxy S8 Plusto get the full experience. This not only looks great but has a big advantage when it comes to keeping the size of the phone from getting out of control.

Design and build : -

The S8 is pretty much the same width, thickness and weight compared to its predecessor. It's just a few millimetres taller but jumps from 5.1- to 5.8in when it comes to screen size. So what would typically be an unwieldy device feels barely any different in the hand.

It's a really impressive piece of craftsmanship largely down to significantly reducing the bezels at the top and bottom. A screen-to-body ratio of over 83 percent is impressive stuff.

The physical home button and accompanying capacitive keys are gone to achieve this. Now you have on-screen navigation and a pressure sensitive home button built into the display – we'll talk about this more later.The fingerprint scanner is now on the back but quite awkwardly next to the camera rather than below it. Right-handed users are likely to smudge the camera when using it. This is our main bugbear in terms of the design and it should really be below the camera, despite creating an unsymmetrical look. 

A lot of users will be pleased to hear that Samsung has retained the headphone jack on the bottom. The Galaxy S8 is made from a lot of glass once again so it’s a little slippery but has a Gorilla Glass 5 back to resist damage. You'll probably want to get a case to protect this expensive slab of metal and glass, though, which is a shame considering the outstanding design.

As you'd expect the Galaxy S8 is fully dust and waterproof like its predecessor so has an IP68 rating. That extra button you see on the left side of the phone is to quickly launch Bixby, Samsung's artificial intelligence assistance – see the software section for more on this.

There are five colours to choose from but in the UK we'll get three at launch: Midnight Black, Orchid Grey and Arctic Silver (the latter with arrive at at later date). Samsung may well bring the blue and gold options at the later date but we'll have to wait and see

Featurs and hardware :

Compared to the Galaxy S7, the new Galaxy S8 isn’t dramatically different when it comes to the specs and hardware on offer. That's partly because the S7 ticked a lot of boxes but there are new components with the screen being the most obvious and impactful change.

Infinity Display

As mentioned in the design section, Samsung has impressively jumped from 5.1- to 5.8in when it comes to screen size. This is despite the phone only being a little taller in shape. If that's not big enough, the Galaxy S8 Plus is a whopping 6.2in.

Like the LG G6, the Galaxy S8's display had rounded corners which look great, matching the curvature of the phone's metal frame. Samsung has also opted for a similar aspect ratio of 18.5:9 meaning the screen is very tall (or wide in landscape). Samsung calls it the 'Infinity Display'. Read: Galaxy S8 vs LG G6.

You can fit more on the screen, of course, and the aspect ratio suits content like videos m inuch better so you can, depending on the source content, watch videos without annoying black bars. Depending on what you're viewing, the viewing area is up to 36 percent bigger.

The phone sticks to Samsung's preferred SuperAMOLED display technology ensuring great contrast and colours. The Galaxy S8 screen resolution is WQHD+, 2960x1440 in this case because the screen is so tall. A pixel density of 570ppi is enough for anyone.

It's worth noting that it defaults to Full HD+ (2220x1080) but you can change it in the settings if you wish. The lower resolution improves graphics performance and also aids battery life without a noticeable drop in quality. If you want, you can also drop it down to 1480x720.

Specs aside, the Galaxy S8 also now has the well-known edge screen as standard so there's no need to buy the edge version any longer (like the Galaxy S7 edge). The curve is more subtle than previous edge devices, though, so you just have the edge panels rather than any other additional functionality.

There are some new features to make the screen easier to use one-handed which we'll cover in the software section, and the display is always-on should you want it to be.

One last thing to mention about the screen is that it has Mobile HDR Premium certification by the UHD alliance. The ability to display HDR content sounds good but you'll only get it with certain titles on Amazon Prime Video. More partners will be announced.

Tech guru : Google Fuchsia Operating system

Fuchsia is a capability-based, real-time operating system (RTOS) currently being developed by Google. It was first discovered as a mysterious code post on GitHub in August 2016, without any official announcement. In contrast to prior Google-developed operating systems such as Chrome OS and Android, which are based on Linux kernels, Fuchsia is based on a new microkernel named "Magenta", derived from "Little Kernel", a small operating system intended for embedded systems. Upon inspection, media outlets noted that the code post on GitHub suggested Fuchsia's capability to run on universal devices, from embedded systems to smartphones, tablets and personal computers. In May 2017, Fuchsia was updated with a user interface, along with a developer writing that the project was not a "dumping ground of a dead thing", prompting media speculation about Google's intentions with the operating system, including the possibility of it replacing Android.

It is distributed as free and open-source software under a mix of software licenses, including BSD 3 clause, MIT, and Apache 2.0.

Features :- 

Fuchsia's user interface and apps are written with "Flutter", a software development kit allowing cross-platform development abilities for Fuchsia, Android and iOS. Flutter produces apps based on "Dart", Google's new version of JavaScript, offering apps with high performance that run at 120 frames per second. Flutter also offers a Vulkan-based graphics rendering engine called "Escher", with specific support for "Volumetric soft shadows", an element that Ars Technica wrote "seems custom-built to run Google's shadow-heavy "Material Design" interface guidelines".

Due to the Flutter software development kit offering cross-platform opportunities, users are able to install parts of Fuchsia on Android devices. Ars Technica noted that, while users could test Fuchsia, nothing "works", adding that "it's all a bunch of placeholder interfaces that don't do anything", though finding multiple similarities between Fuchsia's interface and Android, including a Recent Apps screen, a Settings menu, and a split-screen view for viewing multiple apps at once.

Tech Guru :- Xiaomi Mi Note 4

Xiaomi launched the next handset in the Redmi series, the Redmi Note 4 powered by SD 625. The price starts from Rs. 9,999.
The Redmi Note 4 box pack contains handset, SIM tray ejector pin, user manual, warranty card, data cable and travel charger. The Note 4 SAR values are : 0.375W/Kg.

Design, Display and OS

The Redmi Note 4 looks similar when compared with the Redmi Note 3, however there are some minor changes. This handset is using a metal body (top and bottom part – darker shades is plastic). Build and finishing is very good. Weight with battery is 165 grams and dimensions are 76 x 151 x 8.4 mm.

This is a dual SIM handset you can use Micro SIM + Nano SIM or Micro SIM + Micro SD card. 4G with VoLTE is supported. Reliance Jio SIM worked.

There is LED Notification, you can change the colors. Redmi Note 4 is packed with good number of sensors – accelerometer, light, proximity, gyro, hall and magnetic.

This Redmi handset sports a 5.5 inch screen with 2.5D curved glass supporting 1920 x 1080 pixels resolution. Touch is smooth and color reproduction, viewing angles are very good.

Redmi Note 4 sails on MIUI 8 based on Android marshmallow. It will get Android Nougat update later on.

Memory and Storage

Note 4 comes with 2GB or 3GB RAM with 32GB ROM or you can go for the 4GB RAM variant with 64GB ROM. OTG is supported. On first boot you will get around 56GB free space and on the 4GB RAM variant you will get around 2 GB free RAM.

Performance

The Snapdragon 625 octa core 64 bit processor clocked at 2GHz with Adreno 506 GPU does an excellent job. Though the benchmark scores are lower than Redmi Note 3 you will hardly notice any difference in the performance.

Best part is that the handset does not heat up. The maximum battery temperature I encountered was 37 degrees. In fact when compared with other handsets the battery temperature is way low (also not to forget its winter season), but still temp is lower compared with other handsets.

Benchmark

AnTuTu : 61862 / 12860  2^nd time 62428  / 12925
Nenamark 2 : 60.1fps
Disk Speed : 216 MB/s read / 151 MB/s write
Multi Touch :10 point

Gaming

Both Modern Combat 5 and Asphalt 8 games were playable, smooth, no lags. The best part was the handset battery temperature – max battery temperature I encountered was 37 degrees. .

Redmi Note 4 did not heat up when playing games. Perfect for gaming users, especially those who spend a lot of time playing games on their mobile phone.

Camera

There is 13MP camera on the back and 5MP on the front. Camera quality is above average (make sure to update the OS / also check this page for Redmi Note 4 camera review video). Note 4 can shoot FHD videos. The hardware is powerful, it can play 4K, but the camera app gives max 1080p recording option.

What is Ransomware wanna cry ? Its Attack And Prevention

Meaning :-

Ransomware is a type of malicious software that carries out the cryptoviral extortion attack from cryptovirology that blocks access to data until a ransom is paid and displays a message requesting payment to unlock it. Simple ransomware may lock the system in a way which is not difficult for a knowledgeable person to reverse. More advanced malware encrypts the victim's files, making them inaccessible, and demands a ransom payment to decrypt them. The ransomware may also encrypt the computer's Master File Table (MFT) or the entire hard drive. Thus, ransomware is a denial-of-access attack that prevents computer users from accessing files since it is intractable to decrypt the files without the decryption key. Ransomware attacks are typically carried out using a Trojan that has a payload disguised as a legitimate file.

Attack :-

On 12 May 2017, WannaCry began affecting computers worldwide.The initial infection might have been either through a vulnerability in the network defenses or a very well-crafted spear phishing attack. When executed, the malware first checks the "kill switch" domain name.If it is not found, then the ransomware encrypts the computer's data, then attempts to exploit the SMB vulnerability to spread out to random computers on the Internet, and "laterally" to computers on the same network.As with other modern ransomware, the payload displays a message informing the user that files have been encrypted, and demands a payment of around $300 in bitcoin within three days or $600 within seven days.

Organizations that lacked Microsoft's security patch to Windows were affected by the attack, although there is so far no evidence that any were specifically targeted by the ransomware developers.Initially, any organization still running the older Windows XPwas at particularly high risk because no security patches had been released since April 2014 (with the exception of one emergency patch released in May 2014). However, after the outbreak, Microsoft released a security patch for Windows XP on 13 May 2017, the day after the attack launched.

According to Wired, affected systems will also have had the DoublePulsar backdoor installed; this will also need to be removed when systems are decrypted.

Ken Collins of On 12 May 2017, WannaCry began affecting computers worldwide. The initial infection might have been either through a vulnerability in the network defenses or a very well-crafted spear phishing attack.When executed, the malware first checks the "kill switch" domain name.If it is not found, then the ransomware encrypts the computer's data, then attempts to exploit the SMB vulnerability to spread out to random computers on the Internet, and "laterally" to computers on the same network.As with other modern ransomware, the payload displays a message informing the user that files have been encrypted, and demands a payment of around $300 in bitcoin within three days or $600 within seven days.

Organizations that lacked Microsoft's security patch to Windows were affected by the attack, although there is so far no evidence that any were specifically targeted by the ransomware developers. Initially, any organization still running the older Windows XP was at particularly high risk because no security patches had been released since April 2014 (with the exception of one emergency patch released in May 2014).However, after the outbreak, Microsoft released a security patch for Windows XP on 13 May 2017, the day after the attack launched.

According to Wired, affected systems will also have had the DoublePulsar backdoor installed; this will also need to be removed when systems are decrypted.

Ken Collins of Quartz wrote on 12 May that three or more hardcoded bitcoin addresses, or "wallets", are used to receive the payments of victims. As with all such wallets, their transactions and balances are publicly accessible even though the wallet owners remain unknown. To track the ransom payments in real time, a Twitterbot that watches each of the three wallets has been set up. As of 15 May 2017 at 7 PM, a total of 220 payments totaling $59,747.53 had been transferred.

 wrote on 12 May that three or more hardcoded bitcoin addresses, or "wallets", are used to receive the payments of victims. As with all such wallets, their transactions and balances are publicly accessible even though the wallet owners remain unknown. To track the ransom payments in real time, a Twitterbot that watches each of the three wallets has been set up. As of 15 May 2017 at 7 PM, a total of 220 payments totaling $59,747.53 had been transferred.

How to defend against the ransomware

The vulnerability does not exist within Windows 10, the latest version of the software, but is present in all versions of Windows prior to that, dating back to Windows XP.
As a result of Microsoft’s first patch, users of Windows Vista, Windows 7, and Windows 8.1 can easily protect themselves against the main route of infection by running Windows Update on their systems. In fact, fully updated systems were largely protected from WanaCrypt0r even before Friday, with many of those infected having chosen to delay installing the security updates.
Users of Windows XP, Windows Server 2003 and Windows 8 can defend against the ransomware by downloading the new patch from Windows.All users can further protect themselves by being wary of malicious email attachments, another major way through which the ransomware was spread.

A of Microsoft’s security response team, Phillip Misner, wrote: “We know that some of our customers are running versions of Windowsthat no longer receive mainstream support.

“That means those customers will not have received the … Security Update released in March. Given the potential impact to customers and their businesses, we made the decision to make the Security Update for platforms in custom support only, Windows XP, Windows 8, and Windows Server 2003, broadly available for download.”

Source : Wikipedia