4 Things you should know about Bitcoin



In the past few years, you may have heard about Bitcoin, the digital currency. Bitcoin is a type of cryptocurrency, where the security and encryption implication is essential. Since its discovery in 2008, the price of Bitcoin has gone up sparking a lot of conversation. Even the great investors have debated on the legitimacy and relevance of this new form of currency. The discussions have left us with more thoughts to review. However, those are opinions, and while useful, it is critical to know the facts. Here are four things you should know about Bitcoin.

1. What is Bitcoin?

As discussed earlier, Bitcoin is an encrypted digital currency, which is also known as a cryptocurrency. This currency is a global payment system and is built on the idea of a technology called blockchain. The technology is a virtue ledger that that keeps track of every transaction. No one controls Bitcoin, and the accounting is publicly distributed. In theory, anybody can track the operation and verify its legitimacy. Therefore, Bitcoin is neither a fraud nor a golden nugget. In the analogue world, physical money such as goods and paper money is limited by distance. In the digital world, we eliminate the constraint of distance and speed. However, banks control the rate. The crypto world eliminates both human and institutional constraints.

2. How is Bitcoin Created? 

Bitcoin is created through a mining process. Blockchain depends on a network of exchange that ensures the integrity of the transaction history by achieving consensus. The mining process starts with validating a transaction. Once certified, the exchangers need to race, using trial and error, to solve a mathematical puzzle that requires massive computing resources. The first computer to solve the math issue is rewarded with Bitcoins. Bitcoin mining serves two purposes: the process creates new coins and facilitates the processing of transactions in the network. The protocol of creating the currency is known as Proof of Work (PoW).

3. The value of Bitcoin. 

Only 21 million Bitcoins will ever be built, meaning that the currency is deflationary compared to paper money, which is inflationary. Bitcoin derives its value and security from the fact that you can prove the substantial computing power and electric energy used to solve a mathematical problem. In this process, you are protected against fraud and fake information. While PoW creates Bitcoin, a verifiable network backs and authenticates the currency. Anyone can create their own money, but you need a community to accept it for it to have value. Bitcoin has existed for eight years, and the global community has been transacting with the currency.

4. Where to use Bitcoin. 

You can use Bitcoin for both local and global payments. For example, Bitcoin Prediction market and Exchange is a global betting site that allows users to place bets using the currency.  Bitcoin provides a faster, more efficient and hassle-free way to exchange money. The cryptocurrency allows money transfers, peer-to-peer, without an intermediary like a bank. You can transfer Bitcoin at a faster rate at a lower fee compared to digital money.

Bitcoin was the first successful cryptocurrency on the blockchain that gave the world universal, virtual, and borderless money. Bitcoin defined the future of money since it is shaping the future of economies and transactions.  

Replicate Real world Security Vulnerabilities with HackerOne Sandboxes for free



Popular bug bounty platform HackerOne is know to help the community in learning new skills and helping beginners get started. They already have Hacker101 where one can learn about security for free. Recently HackerOne tied up with cyber security training company HackEDU and offered five sandbox environment modeled after popular security bugs reported through their platform.

Its a very good step by them as most of the time when we are learning we don't get something like this and always trying things in live websites is a risk.

All the five hackboxes that they developed is very interactive and they guide you throughout.

Here are the five hackboxes

1. Worm Clickjacking in Twitter


This hackbox replicate a wormable clickjacking attack via playcards which was reported in May 2018 to twitter. You can access it here.

2. XXE flaw in Semrush



This attack challenges users to reproduce XML external Entity that could be exploited to at read arbitrary files from a server. This flaw was reported to SEMrush in March 2018. You can access it here.

3. Command Injection attack in Imgur



The third hackbox is for trying to get control of a server by using command injection attack. The real vulnerability was discovered in Imgur and reported in April 2017.

4. SQL Injection Grabtaxi



This flaw is about about a SQL injection that was discovered in Grabtaxi back in November 2017.

5. XSS in HackerOne



The final hackbox is about a Cross site scripting issue in a third party component used by hackerone to manage contact forms which was disclosed in August 2017.

The main purpose of these demos is to provide a safe and legal way to practice real case hacking techniques and best part is that it comes with explanations on how each bugs works and also they guide the uses in exploiting it.

Joyoshare Media Cutter for Mac - Best Video Cutter? [ Review ]



These days making videos is very trendy. Almost all social media platform started giving more importance to video content. We have seen how youtubers have grown over the last few years and how facebook and instagram too started working on their own video platforms like IGTV and facebook watch.

One of the most important factor of making video is having a good video editor and a good audio and video cutter. I see a lot of people asking their favorite youtubers what video editor they use. Often it becomes difficult for beginners to use the same video editors that are used by big youtubers as it cost a lot of money and beginners are not able to afford it.

Today we will review a video and audio  cutter which has all the premium features and is not heavy on your pocket. Lets me share with you Joyoshare media Cutter for mac. The best thing ? It has a free trial option for you to try. Interesting right ? Lets get started

Joyoshare Media Cutter for Mac Review

Joyoshare Studio is a renowned name as one of the pioneer software companies offering a wide range of video and audio tools. Currently, the company provides tools such as video converter, media cutter, HEIC converter, and screen recording apps for both Windows and Mac users.

The best part that i like about them is that they don't compromise on features in the trial version. You get to use every feature available. It is a smart modern and easy to use multifunctional video/audio cutter. Their UI is som simple that you does not need to have any previous experience in using it or any other alternative aoftwares. The simple user interface lets you either drag-and-drop or upload media files to the software and allows you to cut, split, and merge video clips as per your needs. Also, if you like any favorite scene or music from your favorite movie or TV show, you can just cut that part and export it to your device. With a wide range of video and audio cutting tools, you can do a lot more with raw videos.

The software helps you to split, cut, merge both the video as well as the audio files and supports formats like MP4, MKV, AVI, 3GP, MOV, MPEG along with audio formats like MP3, WAV, WMA etc.

System Configuration:

Joyoshare Media Cutter for Mac occupies very low memory on your system and it works on almost all kinds of Mac PC’s with the following specs:

Processor: The Apple computer should have a minimum of 1GHz Intel processor

RAM: With at least 512MB RAM

Supported Operating System: Mac OS X 10.8, 10.9, 10.10, 10.11, 10.12 Sierra and the latest 10.13 High Sierra

Cut and convert Videos / Audio to all Popular Formats

Any video or audio file can be cut, merged and converted using Joyoshare Media Cutter because it supports all popular video and audio formats used today. You don't have to worry about not supporting any specific formats.

Work at 60x Faster Speed with Lossless Quality

Joyoshare Media Cutter in one of the innovative processor and one of its kind and it balances both the conversion speed as well as the quality of the video. The processor works at 60X speed without loss of any quality of audio and video making the seamless experience of the quality of the video.

Improve the Efficiency and Accuracy of Cutting Videos/Audios

The reason why it is one of the best media cutter for mac is that it got a very clean UI and it is very efficient and accurate in cutting videos and audios.  You can select a start and end time or use the four adjusting buttons which drastically improves how clean, precise and crisp your editing is making your exported videos clean with precise editing.


 Steps to Crop Videos with the media Cutter

Step 1 : Add the target





You have two methods to do this. One is click the “Open” button and import the target video or audio. The other is to just drag and drop the file to the program. Remember that you can only add one file at a time.

Step 2 : Determine the cut segment


Just use the control key to select the trimming segment. Alternatively, manually set the temporal interval as you like. Both ways allow you to have a real-time preview about the source file.

Step 3 : Choose the output format


Then click the “Format” button and select an output format as you like. We recommend you to tick the “High-Speed Mode”, so you can get the video fast and losslessly. You are also enabled to customize your own video/audio if you choosing the “Encoding Mode”.

Step 4 : Cut the video/audio now

After all the settings are finished, click the “Start” button to cut the file and while for a while till it's completed. Open the destination folder to find your new video or audio.


Final Verdict

If you are someone who would like to edit one video at a time lets say your college farewell, birthday party etc then this software is best for you as it is lightweight and easy to use. You cannot do complextask with it but its very good to do small works like editing one video or audio file. Most of the video and audio cutter ruin the quality but using Joyoshare media cutter you can be sure that your quality is not compromised.

Decrypt GandCrab Ransomware for free [ Guide ]



Ransomware have become a big issue in recent times. A lot of people often reach out to me when their files get locked by some ransomware. But once your system is encrypted by ransomeware, you can do very little about it unless its decryptor is available already. Gandcrab is One of the most popular ransomeware and in this article we will discuss how we can decrypt Gandcrab Ransomware using a decryption tool developed by Romanian Police, Europol and Bitdefender.

The tool is an update on a first version that was released in February by Bitdefender. The new GandCrab decrypter is more potent and can recover data for more GandCrab versions --v1 (GDCB extension), v4 (KRAB extension), and v5 (random 10-character extension, also the current/latest GandCrab version), respectively.

The free GandCrab decryption tool will decrypt files encrypted by versions 1, 4 and 5 of the ransomware. These versions are recognizable by the extensions they use: GDCB, KRAB, and a series of random characters of various length (example: .rnsgl). Instructions on using the decryptor are available later in the article.

Bitdefender was able to create the decrypter after the developer of Gandcrab released legitimate and authentic decryption keys for victims located in Syria , out of compassion.


The most targeted countries based on all versions of GandCrab are: US, UK, China, India, Brazil, and Germany," says Bitdefender.

Decrypting GandCrab v1, v4, and v5

To use the new GandCrab Ransomware decryptor, you need to make sure you have an available copy of the ransom note as it contains a key that will be used to decrypt your files.

Once you confirm that you have an available ransom note on the computer, you should download the decryptor using the following link.


Once downloaded, start the decryptor and accept the license agreement. You will then be shown the main decryptor screen. At this screen, put a checkmark in "Scan entire system", as shown below, and then click on the "Scan" button.


The decryptor will now begin to scan for a decryption key and decrypt any files encrypted by GandCrab that it can find.


When finished, the decryptor will indicate if it had any problems decrypting files. As you can see from the image below, the decryptor stated "Some files could not be decrypted".


To determine what files were not decrypted, you can view the log files located at %Temp%\BDRemovalTool\BDRansomDecryptor\BDRansomDecryptor1600.log. The log file name may be slightly different per computer. This log file will list all files that it could not decrypt.
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The Top 3 Reasons to Monitor a Cell Phone


Telephone booths were essential items in the early twentieth century because they facilitated long
distance communication. Then landlines became a reality in the latter years of this century.
Today, we have mobile devices. These devices help you talk to anyone in the globe at any time as
long as the other person accepts the call. Sadly, these devices are as harmful as they are helpful.
Kids are particularly vulnerable to the harm that results from misusing them. Therefore, tracking
mobile devices is critical in many instances. Here are the top 3 reasons to monitor a cell phone.


1. Protect Your Loved Ones from Cyber Bullying
Twenty-five percent of teenagers have experienced cyberbullying at some point in their lives. Statistics also show that most of this bullying occurs through mobile devices. Shielding them from this vice is critical because bullying devastates children emotionally. Sadly, protecting your kids from cyberbullies is a daunting task because kids are afraid to speak about it. Remember, only 10% of bullied teens report such incidents to their parents. Monitoring their cellular activity is an excellent way of helping them. More specifically, you will discover cases of harassment. Then you will talk to them about it in addition to dealing with the culprit. Protecting fellow adults from cyber bullies is also necessary in some cases.

2. Catch Unscrupulous People Including Predators
Unscrupulous people often use smartphones to harm or defraud their victims. Remember, these people rely on isolating their targets. Then they can manipulate them without their loved ones knowing about it. For example, imagine someone blackmailing your spouse over an embarrassing incident that occurred years ago. Another person can take advantage of an employee at your office convincing him or her to reveal sensitive information about your organization. Moreover, predators rely on the impressionable nature of children. That is how they lure them away from home. Did you know that 8% of teenagers have met someone they came across online? Monitoring cell phones would help you catch these unscrupulous people so that you can protect your spouse, employees, and kids.

3. Discovering the Truth about Events and Situations
People often lie about specific events and situations. Unfortunately, they fail to realize the impact of those lies on everyone involved. Usually, explaining to them why telling the truth is essential bears no fruit. The only recourse you have under such circumstances is monitoring their cellphones. Doing so is especially critical in cases where someone is suffering from depression, negative influence from peers, or addiction among other problems. You need to know what kind of websites this person is visiting. What plans does his peer group have? What kind of purchases is your child making? Relationships are worth monitoring as well. For example, is there an inappropriate workplace relationship that is happening under your nose? Is your daughter dating someone? What is his intention towards her? In this post, you will discover a highly specialized spy app that will enhance your monitoring capabilities.

Freelancers in Fiverr and Freelancer.com are baited with job offers to download malwares



Freelancer.com and Fiverr are two of the most popular freelancer platform in the internet. Thousands of people visit the website to get job or get their work done. And wherever a lot of people gather, hackers make it their target. Cybercriminals are targeting freelancers in a new malware campaign sending malicious macros disguised as job offers.

Security researchers at MalwareHunter team have discovered a new piece of malware that is targeting freelancers.



In one example, the threat actors sent an email asking the intended victim to check the attached document and then get back to them with a “cost and time frame,” while in another example the threat actor sent over a document entitled “My details.doc,” which also contained malware.

Once clicked, The recipient is asked to enable macros which work as malware dropper. MalwareHunterTeam has urged users to refrain from enabling macros and keep their anti-virus software activated once digging into new files. For instance, one of the victims who had their anti-virus software enabled was able to detect the malicious document.