SCRYPT

SHA-256,scryptScrypt (by Wikipadia) In cryptography, scrypt is a password-based key derivation function created by Colin Percival, originally for the Tarsnap online backup service. The algorithm was specifically designed to make it costly to perform large-scale custom hardware attacks by requiring large amounts of memory. In 2012, the scrypt algorithm was published by IETF as an Internet Draft, intended to become an informational RFC. A simplified version of scrypt is used as a proof-of-work scheme by a number of cryptocurrencies first implemented by an anonymous programmer called ArtForz in Tenebrix followed by Fairbrix and Litecoin soon.

SCRYPT

A password-based key derivation function (password-based KDF) is generally designed to be computationally intensive, so that it takes a relatively long time to compute (say on the order of several hundred milliseconds). Legitimate users only need to perform the function once per operation (e.g., authentication), and so the time required is negligible. However, a brute-force attack would likely need to perform the operation billions of times, at which point the time requirements become significant and, ideally, prohibitive.

Previous password-based KDFs (such as the popular PBKDF2 from RSA Laboratories) have relatively low resource demands, meaning they do not require elaborate hardware or very much memory to perform. They are therefore easily and cheaply implemented in hardware (for instance on an ASIC or even an FPGA). This allows an attacker with sufficient resources to launch a large-scale parallel attack by building hundreds or even thousands of implementations of the algorithm in hardware and having each search a different subset of the key space. This divides the amount of time needed to complete a brute-force attack by the number of implementations available, very possibly bringing it down to a reasonable time frame.

The scrypt function is designed to hinder such attempts by raising the resource demands of the algorithm. Specifically, the algorithm is designed to use a large amount of memory compared to other password-based KDFs, making the size and the cost of a hardware implementation much more expensive, and therefore limiting the amount of parallelism an attacker can use, for a given amount of financial resources.

GENESIS MINING
33
9.9/10
GENESIS MINING

GENESIS MINING INTRODUCTION
GENESIS MINING is the world’s leading and most transparent hosted hashpower provider for Bitcoin and Altcoins. Reliable & Customer Oriented.
They are heavily investing in the best available hardware to stay at the edge of technology. For you, it is the easiest way of mining: no need to assemble rigs or to have hot, loud miners in your home.
Genesis Mining offers you a smart and easy way to invest your money. Their solution is suitable for those who are new to the world of crypto currencies, as well as for cryptocurrency experts and large-scale investors. Genesis Mining is the World’s first large scale multi-algorithm cloud mining service offering an alternative to those who would like to engage in Bitcoin and altcoin mining.
They are a team of experts in the digital currency sector, and their core service is to provide the most efficient and reliable mining rigs for rent.
No matter which package you choose, you are renting the latest technology, which guarantees profitability for as long as possible. Also, the rigs you rent consume very cheap electricity and are cooled efficiently, thanks to the optimal locations of their farms. To top this, there is no waiting

SIDCASH
0
8.5/10
SIDCASH

SIDCASH INTRODUCTION
SIDCASH is the service opening the door into the world of mining
SidCash is a new company marching with the pace of time and providing an opportunity to do mining for everybody who would like to do it
SidCash provides the best conditions in the area of mining. You do not need to worry about expensive equipment and its maintenance, their specialists will do everything for you.
SIDCASH FACTS

SIDCASH was last modified: November 28th, 2016 by Bitcoin Cloud Mining

Hashflare
21
9.7/10
HASHFLARE

HASHFLARE INTRODUCTION
HASHFLARE is a new range of cloudmining services brought to you by the HashCoins team of cryptomining experts. Their team has been involved with cryptocurrencies since the inception of Bitcoin and has over 3 years of experience in the field of mining cryptocurrencies.
Their goal is to make mining accessible to all users regardless of age, location, investment, technical nouse or experience. they want to give our customers an opportunity to try out cryptocurrency mining and earn Bitcoin as a reward. On a larger scale, they hope to contribute to the development of mining services and subsequently to the development, establishment and adoption of Bitcoin both as a currency and as an economic system.
Cloud mining offers a unique option for mining with a low cost of entry as well as minimal risk and expense, which is opposite to traditional models of mining that involve procurement, maintenance and configuration of highly specialized hardware.
Due to the very complex nature of mining and its dependence on many external factors (mining difficulty, bitcoin exchange rate, utility costs etc), it is next to impossible to predict the size of an individual’s earnings. One thing that’s not difficult to predict is Bitcoin’s prominence

HASHING 24
0
9.6/10
HASHING 24 (BitFury)
BITCOIN CLOUD MINING COMPANIES / 14th October 2016

HASHING 24 INTRODUCTION
HASHING 24 was made by professionals for individuals who want to get involved in bitcoin mining. They believe that everyone should benefit from the mining and be able to have access the newest technologies and large scale industrial data centers from your laptop or mobile phone.
The Hashing24 team has been involved in a cloud mining business since 2012. They constantly explore the bitcoin market and they want to share their knowledge with you.

They stay informed on the major players in the bitcoin mining space.
They constantly monitor new innovations and implement them for you.
They choose the most reliable and reputable partners with the best equipment and data centers, what allows them to constantly increase selling capacities while providing their customers with the best opportunities. They ensure their partners provide warranties for their equipment and its maintenance, meaning they will hold them accountable for any disruption to your cloud hosting for mining.
They constantly evaluate new partners in order to provide you with the best speed, capacity and performance.

They cooperate with different mining companies. Their initial supplier of mining power is one of the industry’s leaders – BitFury.
HASHING 24 FACTS

XBTC MINE
4
8.3/10
XBTC MINE
BITCOIN CLOUD MINING COMPANIES / 17th September 2016

XBTC MINE INTRODUCTION
XBTC MINE is one of the most established affordable & Profitable cloud mining Services companies. And new range of cloud mining services brought to you by the winner team of crypto mining experts. Their team has been involved with crypto currencies since the inception of Bitcoin and has over 3 years of experience in the field of mining crypto currencies. Their goal is to make mining accessible to all users regardless of age, location, investment, technical no use or experience. They want to give their customers an opportunity to try out crypto currency mining and earn Bitcoin as a reward. On a larger scale, they hope to contribute to the development of mining services and subsequently to the development.
Their effective Platform for Bitcoin mining is a highly recognized Bitcoin mining service provider as a result of our continued commitment to providing the best financial services to our clients. So they always strive to provide them with top-notch services. you can be assured that your financial future will be protected when you invest your crypto currency with them.
XBTMine. is a crypto currency company, founded in 2016. They provide a wide range of services, which are particularly designed

MINEGATE
3
8.3/10
MINEGATE
BITCOIN CLOUD MINING COMPANIES / 13th September 2016

MINEGATE INTRODUCTION
MINEGATE is a company that offers mining cloud service that provides to investors the mining gains in a simplified form. They work as a local group since 2012 and now they opened their business to new investors.
Focused on sustainability, the economy in internal spending and the use of alternative and redundant power supplies, along with the latest mining machines in the market, they got the differential of investment price and the ROI. This means that between 3 or 4 months you will receive all of your investment, and you can withdraw the funds or reinvest them at any time in their cloud mining platform.
More GH/s you get, more faster will be the return on your investment. You can start mining immediately after its registration with their 50GH/s bonus free!.
MINEGATE FACTS

MINEGATE was last modified: November 18th, 2016 by Bitcoin Cloud Mining

BITLIONER
2
8/10
BITLIONER
BITCOIN CLOUD MINING COMPANIES / 9th September 2016

BITLIONER INTRODUCTION
BITLIONER:  You can start earning with your small investment now. Invest Now and get relaxed because they will set your share with out bitcoin mining hardware. Few steps and you can start mining with them.
They establish hardware within maximum 3 days. They manage your investment/fund share and hardware during this time. Once your hardware is perfectally managed, Mining gain will be added daily to your wallet.
They normally recommend user to make withdraw weekly. They do not have any hidden fees on weekly withdraw. But if you want daily withdraw then they charge 10% of withdraw amount.
BITLIONER FACTS

BITLIONER was last modified: September 9th, 2016 by Bitcoin Cloud Mining

BITEMINER
224
5/10
BITEMINER | HAS PROBLEMS

BITEMINER INTRODUCTION
BITEMINER is a highly affordable cloud mining service with a wide range of pricing options. It allows users to purchase mining contracts, starting at as little as 20KH/s. With a break-even period of about 3-4 months, BiteMiner’s contracts are a good opportunity for small-scale investment in Bitcoin.
BiteMiner offers the most affordable and trustworthy cloud-based Bitcoin mining service in the industry.BiteMiner has something for everyone, depending upon their spending power and expected returns on investment. The mining contract options come with flexible and tiered pricing structure. The pricing is based on the amount of computational power one wants to invest in which reduces with increasing hash rates. BiteMiner is a leading cloud-based Bitcoin mining service provider.
BITEMINER FACTS
 

BITEMINER | HAS PROBLEMS was last modified: November 27th, 2016 by Bitcoin Cloud Mining

BITCLUB NETWORK
5
9.1/10
BITCLUB NETWORK

BITCLUB NETWORK INTRODUCTION

BITCLUB NETWORK is not owned by any single person or entity, they are a team of experts, entrepreneurs, professionals, network marketers, and programming geeks who have all come to together to launch a very simple business around a very complex industry. Anyone can join BitClub Network and begin earning a passive income by taking advantage of their expertise in Bitcoin mining and other Bitcoin related services.
BitClub Network is a community of people who have come together to support Bitcoin and other digital currencies. They are helping to educate, provide services for, secure, protect, and ultimately profit from this emerging technology. So far this community has created one of the largest mining pools in the world.
They have combined the power of crowd funding to bring you a very unique and timely opportunity in the Bitcoin industry. By using their expertise they are able to build a profitable mining operation that uses an affiliate payment structure to leverage the earning potential of their members.
The concept is very simple! You purchase mining equipment that is used to mine Bitcoin and they pay you daily on your share of all Bitcoin being mined. When you share

COINDIG
13
1/10
STARTHASH
0
8.3/10
STARTHASH
BITCOIN CLOUD MINING COMPANIES / 17th March 2016

STARTHASH INTRODUCTION
STARTHASH believes mining is important for Bitcoin’s future and adoption as a global financial network. They have years of experience mining bitcoin with various hardware and software platforms.
They have opened their private mining installation to the public and private investors. Their first target was to deliver 1 PH of mining power in their first public farm by the end of 2015. They are constantly expanding their operations with new locations and installations, looking for the most powerful hardware and cheapest electricity to provide you with the best mining efficiency.
The mining services industry is littered with failed and dishonest operations that have robbed mining enthusiasts over the years. They believe strong businesses with good leadership and technical knowledge can remain viable in the future. Their efforts are based on a long term and stable vision and they intend to provide transparency and honesty regarding their equipment, mining capacity and contractual offerings. Their hashing power is prepared and sold only after they can guarantee that the infrastructure, mining equipment and electricity can be paid up to the contract expiration dates.
Their planned projects are targeted for a vertical integration into the Bitcoin ecosystem, with mining being the first

FORTACLOUD
0
1/10
FORTACLOUD | NOT PAYING
SCAM / 14th March 2016

FORTACLOUD INTRODUCTION
FORTACLOUD provides secure dedicated and cloud computing solutions. They deliver enterprise-level services to businesses of all sizes and kinds worldwide. They initiated operations in 1999 and since have grown to serve tens of thousands of customers. FortaCloud integrates the industry’s best technologies for each customer’s specific need and delivers it as a service via the company’s commitment to excellence.
The team at FortaCloud are experts with over twenty years of building and maintaining complex technology solutions. All of FortaCloud’s solutions include the security and reliability your customers require. All solutions are housed in secured and reinforced Data Centers, located around the world, with redundant power, and lightning fast fiber connections, as well as24x7x365 support. Their support center runs 24/7/365 with live operator support. Our Network Operations Center is monitored 24/7. Their team is absolutely committed to excellence from design to implementation, and beyond.
FORTACLOUD FACTS
FORTACLOUD | NOT PAYING was last modified: May 20th, 2016 by Bitcoin Cloud Mining

DOUBLE BLOCK
1
1/10
DOUBLE BLOCK | NOT PAYING
SCAM / 13th March 2016

DOUBLE BLOCK INTRODUCTION
DOUBLE BLOCK Founded in 2016 in London, Double Block Inc. opened its doors to the public as a cryptocurrency investment company, offering one of the most comprehensive opportunities for Bitcoin enthusiasts to invest in the future of the world’s most famous cryptocurrency. Initially founded by a group of enterprising Bitcoin aficionados, Hourly Coins Limited has a staff that includes industry professionals in engineering, advanced computational technology, and cryptocurrency mining techniques.
DOUBLE BLOCK FACTS
 
DOUBLE BLOCK | NOT PAYING was last modified: April 18th, 2016 by Bitcoin Cloud Mining

SHINE BITCOIN
4
1/10
SHINE BITCOIN | NOT PAYING
SCAM / 12th March 2016

SHINE BITCOIN INTRODUCTION
SHINE BITCOIN: Digital currencies are poised to radically transform their financial system, but it won’t happen overnight. At SHINE BITCOIN, they believe investors deserve an established, trusted, and accountable partner that can help them navigate the gray areas of digital currency investing. That’s why they are building transparent, familiar investment products that facilitate access to this burgeoning asset class, and provide the springboard to invest in the new digital currency-powered “internet of money”.
SHINE BITCOIN FACTS
SHINE BITCOIN | NOT PAYING was last modified: May 1st, 2016 by Bitcoin Cloud Mining

CRYPTOPRIME
8
1/10
CRYPTOPRIME | WEBSITE GONE
SCAM / 2nd March 2016

CRYPTOPRIME INTRODUCTION
 
CRYPTOPRIME Limited was founded in 2016 and is a cryptocurrency investment company. The comprehensive services were designed to assist Bitcoin holders to ensure they could make sound investments. Based in London, they are proud to offer a team of professionals that encompass a wide array of industries, ranging from advanced computer technology and engineering to cryptocurrency mining techniques.
Their goal is to give customers a unique service within the industry, which is why they have developed a state-of-the-art platform with an extensive infrastructure. Bitcoin mining is available at a reduced cost to their clients. They are able to do this through diversified options, including various mining opportunities. This also makes investing safer and risk is virtually obsolete.
They have financial goals and obligations. To better operate within their field, They use recognized and standardized algorithms, which include Scrypt and SHA-256. Centrally located servers and advanced computer equipment is maintained as a way of delivering stable, continuous returns. Crypto Prime Limited is committed to expanding theirr technical capabilities, and this is done by working with dozens of ASIC miners who have been able to manage Spoondoolies Tech SP30, Bitman AntMiner S5, as well as countless others.
They

CRYPTOMONITOR
1
7.9/10
BITSRAPID
72
8.2/10
BITSRAPID
BITCOIN CLOUD MINING COMPANIES / 18th January 2016

NOTE OF BITSRAPID
WE ARE BACK HERE WITH ALL DATA WE COULD RECOVER.
Some of our data has been crashed by Hackers,We also lost all Bitcoins.
So It took such long time to recover from this hacking attack, We apologise for any inconvenience caused.
We request all users who can not log in using their old log in credential,please sign up again and forwards your earlier approved order. We will update it as quickly as possible.
Old mining powers will be in FROZEN status. On purchase of new mining powers, 25% mining powers of your new purchase will be released from your FROZEN powers automatically.
NOTE OF US
We tested it with a purschase of 700 KH/s. At this moment it looks real
BITSRAPID INTRODUCTION
BITSRAPID CLOUD MINING is a AMERICAN company registered and established in SAN FRANCISCO. The company was born as a result of studying the Crypto-Currency Industry in depth for the past three years, the results of their research resulted in the development of a two tier solution.
Their first Tier was our Cloud Mining Solution. This cloud mining solution enables both novices and seasoned crypto-currency miners the ability to mine various crypto-currencies and gain significant ROI without any equipment investment.

HashOcean
504
1/10
HASHOCEAN | NOT PAYING
SCAM / 17th January 2016

HASHOCEAN INTRODUCTION
HASHOCEAN has Six data-centres. High earning power. Return on investment within 5 months.
HashOcean is a cloud mining website created more than 2 years and a half years ago to the United States and it has 7 data centers in the world (2 in San Francisco, 1 in New York, 2 in Nuremberg and 2 in Singapore). Serious and transparent, it one of the biggest cloud mining sites of the world.
It’s necessary to create an account using your email address. Then you should check your email and log on to HashCoin by using the received data. As soon as you enter the site you get 15 Kh/s and your mining starts. You can control the statistics of earned crypto-currency every day on the Transaction page. If you like the productivity of this service you can purchase the powers on the Buy page.
HashOcean Cloud Mining is a good investment. Miners are going in groups to create a website and offer its customers in the use of mining powers. It is more productive than solo mining. Before investing check these projects and contact for details administration. Cloud Mining is currently the leader in the relation speed / productivity. It is

GigaHash
4
9/10
GIGAHASH
BITCOIN CLOUD MINING COMPANIES / 17th January 2016

GIGAHASH INTRODUCTION
GIGAHASH offers Bitcoin Cloud Services an easy and safe way to purchase hashpower without having to deal with the complex hardware and software setup. The company is registered in Varna, Bulgaria / European Union and operate under EU and Bulgarian law.
They start mining on December 2013 and continue to grow in 2014. Тhe idea to create a company and launch their own business came after several private investors wanted to invest money in crypto currency like Bitcoin. Their first investor was a sailor who wanted at all costs to invest in Bitcoin, but knew nothing about mining hardware.
The services they offer are geared to such clients. Understand the importance and future of crypto currencies, but lack the necessary knowledge and free time to dig alone. Мinimum percentage of all competitors are actually real companies with real hardware. Time and our customers will prove that we are not phantoms.
GIGAHASH FACTS

GIGAHASH was last modified: June 29th, 2016 by Bitcoin Cloud Mining

ZeusHash
0
6.5/10
ZEUSHASH | MOVED TO OXBTC
CLOSED / 17th January 2016

ZEUSHASH INTRODUCTION

ZEUSHASH Integrated Systems Limited is known for its ability to deliver state of the art crypto currency ASIC chip design and miner manufacturing. Their mission is to connect global crypto currency lovers together and provide excellent goods and services for the community
They want to introduce a win-win solution to the community to make the best of global resources to better serve you. Their Global Mining Network consists of many reliable partners together to deliver the most cost-efficient hashing power and cloud service for all customers.
Backed by the team that brought the most popular LTC (Scrypt) miner in the world – ZeusMiner, ZeusHash is stable with superior performance from day 1. With their proven track record and transparency, it’s a service you can trust.
ALL CLOUDHASH TRANSFFERED TO OXBTC
ZEUSHASH FACTS

ZEUSHASH | MOVED TO OXBTC was last modified: April 1st, 2016 by Bitcoin Cloud Mining

Ore Mine
0
1/10
ORE MINE | DOMAIN HAS BEEN SEIZED
CLOSED / 16th December 2015

ORE MINE INTRODUCTION

ORE MINE is an interesting concept that looks overwhelming but is actually rather simple. It is a faucet that works while you are away, but you will still need to check-in on it at least 1 time every 40 hours to collect the earnings generated every 8 hours. So let it tick over and earn for you, or get busy and promote, buy or gamble for upgrades that will increase your rate of return or add to your total bitcoin balance.
ORE MINE FACTS

ORE MINE | DOMAIN HAS BEEN SEIZED was last modified: April 1st, 2016 by Bitcoin Cloud Mining

My-Hash Cloud Mining
0
1/10
MY-HASH | NOT PAYING
SCAM / 4th December 2015

MY-HASH CLOUD MINING INTRODUCTION

MY-HASH CLOUD MINING are heavily investing in the best available hardware to stay at the edge of technology. For you, it is the easiest way of mining: no need to assemble rigs or to have hot, cloud miners in your home.
Use state of the art hardware in our data centers to mine the most valuable cryptocurrency. Mine bitcoins and altcoins on our highly efficient mining cluster for scrypt based coins. You can mine coins like Litecoin, Dogecoin and the most promising altcoins.
MY-HASH CLOUD MINING FACTS

MY-HASH | NOT PAYING was last modified: April 1st, 2016 by Bitcoin Cloud Mining

MiningRigRentals
0
8/10
MINING RIG RENTALS
BITCOIN CLOUD MINING COMPANIES / 4th December 2015

MINING RIG RENTALS INTRODUCTION
MINING RIG RENTALS is based on our own experience renting multiple Bitcoin mining rigs from them.  MRR has the largest inventory of mining rigs available for rent.  Their service offers every single mining algorithm available. You can rent multiple rigs at one time. You can define up to 5 pools which gives you security and peace of mind that your miners will always be mining.  You can even create profiles to make it easier to rent miners for specific coins.
The only real drawback we’ve found with Mining Rig Rentals is that it is annoying to update a lot of rigs at one time.  We had 27 rigs rented at once and when one of our primary pools started to have difficulties we had to go back and add some new pools to our rigs. There isn’t a single screen to update multiple rigs. Instead you have to click on each one to update separately.
This isn’t a problem for most people.  Most people aren’t renting a lot of rigs at one time.  Additionally most people have a regular set of pools they mine. We were mining a new coin where new pools were being created

Cloud Mining Website
0
1/10
CLOUD MINING WEBSITE | NOT PAYING
SCAM / 26th November 2015

CLOUD MINING WEBSITE INTRODUCTION
CLOUD MINING WEBSITE is running as a separate entity under the umbrella of their parent company. Because of lack of regulation regarding bitcoin in the country, They decided not to form any separate company. Moreover, because of NDA between their parent company and the investors they are bound to keep their operational details as private. So, to keep up with the competition they started to procure ASICs under the name of their parent company and its different subsidiaries.
Like most other bitcoin businesses they also made a big profit at the end of 2013 price spike as well as took the hit of price slump afterwards. But, their existing infrastructure allowes to keep mining at an optimum cost. This was the time, they thought of the idea, why not open their mining infrastructure for the public ? This would allow them to minimize risk as well as garner more mining power. There came the idea of cloud mining.
CLOUD MINING WEBSITE FACTS

CLOUD MINING WEBSITE | NOT PAYING was last modified: November 6th, 2016 by Bitcoin Cloud Mining

NICEHASH
0
8.3/10
NICEHASH

NICEHASH INTRODUCTION
NICEHASH is operating since 2014 and it’s the only cryptocurrency investment marketplace where miners (sellers) can mine different altcoins and get regular and anonymous payments directly in Bitcoins and buyers (investors) can get the opportunity to rent affordable hashing power (cloud mining) and direct it to the pool of their choosing. This way, both miners and buyers profit from the diversity of the marketplace.
NICEHASH FACTS

NICEHASH was last modified: November 28th, 2016 by Bitcoin Cloud Mining

EOBOT
4
8.5/10
EOBOT

EOBOT INTRODUCTION
EOBOT is the easiest, cheapest, and best way to get or mine Bitcoins. Whether or not you use our Cloud Mining or your own hardware, you can mine any cryptocurrency, regardless if it is based on a SHA-256 or Scrypt algorithm
Let your computer relax. Our Cloud solution will mine and hash whatever cryptocurrency you need. Get started with as little as $10 with immediate mining results.
EOBOT FACTS

EOBOT was last modified: November 28th, 2016 by Bitcoin Cloud Mining