Cryptography jobs

Cryptography is the study of hiding information. It intersects the disciplines of engineering, computer science and mathematics. Cryptography is involved in securing passwords, access to sensitive material and to computer systems. If your business needs help with cryptography, you can hire freelance cryptography experts to fulfill your tasks. Start by posting your cryptography task today! Hire Cryptographers

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    78 jobs found, pricing in USD

    Hi, I am looking for an experience cryptocurrency expert/developer to assist or be part owner in a cryptocurrency exchange platform I wish to create... for trading cryptocurrency like bitcoin. Willing to pay more/provide more share for experience developers with 5 or more years experience in this field. We want to create something like: [url removed, login to view] / [url removed, login to view] etc..

    $38568 (Avg Bid)
    $38568 Avg Bid
    15 bids
    Computing Work 6 days left
    VERIFIED

    Need Expert Help For Computing Project

    $20 (Avg Bid)
    $20 Avg Bid
    6 bids

    Enhancing Network Security in a network using Stegnography & Cryptography Proposed project includes Stegnography where encrypted data is hidden into the image and then image is transmitted in the network. For encryption, different algorithms such as DES, MAES with AES and for key exchange method RSA and Diffie-Hellmen to be applied to maintain strong security with stegnography using LSB. The hybrid use of these techniques is to be done making a user friendly GUI. It is needed in 2 days. Max budget is 90$.

    $207 (Avg Bid)
    $207 Avg Bid
    3 bids

    Enhancing Network Security in a network using Stegnography & Cryptography Proposed project includes Stegnography where encrypted data is hidden into the image and then image is transmitted in the network. For encryption, different algorithms such as DES, MAES with AES and for key exchange method RSA and Diffie-Hellmen to be applied to maintain strong security with stegnography using LSB. The hybrid use of these techniques is to be done making a user friendly GUI

    $287 (Avg Bid)
    $287 Avg Bid
    10 bids
    RANSOMWARE .ARENA 5 days left
    VERIFIED

    Hello, I had a ransomware hit my server 4 days ago, and I need an expert to help me de-crypt some encrypted files The email of hacker is sindragosa@[url removed, login to view] Please apply only if you can solve a ransomware security problem before I have a sample that I can send to check if you can de-crypt we can work together Look attached a BAT file encrypted. This .BAT file just run my Backup. If you can decrypt this file you are able to take this job.

    $888 (Avg Bid)
    $888 Avg Bid
    1 bids
    Entropy analysis -- -- 4 4 days left
    VERIFIED

    I am looking for help in conducting analysis . This analysis will be based on average min entropy . please contact me for further details.

    $152 (Avg Bid)
    $152 Avg Bid
    13 bids
    cryptocurrency 4 days left

    i want one brand new crypto coin.

    $456 (Avg Bid)
    $456 Avg Bid
    10 bids
    Develop New Crypto currency 3 days left
    VERIFIED

    We are looking for entirely new Digital coin similar bitcoin ,ethereum ,ripple ,litecoin etc. If you are new to this technology, don't bother to bid on this project. Before bidding I'll request best expert to provide similar work if they have done any, and please avoid posting automated or duplicate proposal for this project. Selected freelancer will be given detail documentation to understand detail about the project. And I would reject the bidder talking about money and time line which you can already do editing your bid and so on.

    $5466 (Avg Bid)
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    17 bids

    I have a pair of weakly generated RSA public key moduli that I could use a hand in factoring and solving from an online challenge. Deadline: 3 hours.

    $35 (Avg Bid)
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    7 bids

    Hi guys. I basically want a multi wallet with BTC, LITECOIN OR ETHER & my new altcoin. I have seen multi wallets before and basically just want a simple built in system where people can transfer my coin with btc and another major currency. The other thing to consider is that my soon to be released currency has a set price of [url removed, login to view] I need this to be simple but effective and transfer currencies into other wallet within the multi wallet

    $655 (Avg Bid)
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    19 bids

    This will be a clone of [url removed, login to view] coin exchange, there will be a few differences disclosed via PM. Preferred candidates will have experience in blockchain and cryptography PROPOSED MILESTONES: 1. [ ]wireframe/UI approval 2. [ ]develop on server 3. [ ]connect to exchange gemini for instant buy and sell functions using USD. 4. [ ]wallet with bitgo integrate 5. [ ]integrate stripe payments 6. [ ]integrate western union quickpay 7. [ ]verification KYC policy api connect netverify 8. [ ]implement verification levels 1, 2, 3 9. [ ]create accounting page income and expense report page with transaction description and dates of all movements like a bank ledger 10. [ ]QA site To be sure you read the job description please reply with relevant projects you have worked on. Thanks.

    $2390 (Avg Bid)
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    26 bids

    I'm looking for someone who can help me come up with the best possible solution for a project my company is doing for one of our university clients. Geeks and creative minds are most welcome! This is a programmatic task. Imagine there is a sequence of 2 million SHA256 hashes and each hash on the list is generated based on the previous one, so for example hash number 1 is: $hash1 = 4a86d363c0f674e05378faecbcb94799db30e5d5a2fa780f8776eb46aa2b2db and hash number 2 will be (using PHP function here): $hash2 = hash('sha256', $hash1); so $hash2 = 54a106663be605dae335cad68bad9cd968832ab4476d8973c1ce8eae1eac0a50 Now the interesting part. Only the two last of these hashes from the list are known (so hash number 1,999,999 and hash number 2 million), and we need to somehow find (calculate, crack, brute-force, etc.) the first hash in the whole sequence, thus revealing the complete sequence. In other words, all hashes are "hidden", and only the two last ones are known. I have come up with a PHP script, but the time needed to execute it exceeds the age of our universe (literally), so another approach is necessary. I think this is similar to mining cryptocurrencies (solving hashes), so i believe we could use GPUs to speed things up. I can have access to a professional mining rig (6 x RX580, i think above 100 MHash computing power), but i don't know how to write the software (what language would be best here?). Another idea was to use quantum computing, but again i don't know how to write the script. I know that IBM is offering access to quantum computing: [url removed, login to view] Or perhaps totally different idea would help here...? Also, my PHP solution is "linear", so it can only be run in a single instance, it's not possible to distribute it or run in paralell (due to the fact of having to store all hashes in a database, which would be HUGE). Is there a way to change the architecture, so it can run on multiple machines? I'm open to any ideas that can help here! :) Please wirte a few words about you and how would you approach solving this task. I'd like to make sure that you are a real human person interested in completing the project :) Thanks! This is a project i'm posting on behalf of my company, we are offering 15.000 USD to a person that can help us solve this puzzle successfully. Long term emplyment opportunity is very possible afterwards.

    $15544 (Avg Bid)
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    21 bids

    We are looking for entirely new Digital coin similar bitcoin ,ethereum ,ripple ,litecoin etc. If you are new to this technology, don't bother to bid on this project. Before bidding I'll request best expert to provide similar work if they have done any, and please avoid posting automated or duplicate proposal for this project. Selected freelancer will be given detail documentation to understand detail about the project. And I would reject the bidder talking about money and time line which you can already do editing your bid and so on. I'm ready to invest whatever it gonna cost, as we will be doing ICO and raising more than millions so best developer gonna be working with us for long term. Lastly what i need from freelancer to whom i share documents is that stop wasting time with informations which you google and respond, be professional and come up with customised tailored roadmap elaboration and graphical representations of explanations of what the next things , what all steps to be done , what all things is required , each and every steps should be properly elaborated and explained in professional way. I would appreciate that. So Thank you for bidding and I'm happy to talk further with expert.

    $2230 - $3717
    Sealed
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    13 bids

    Hello, We need a XMPP Server using OpenFire CMS / Server for both PGP + OTR communication. Where one account can be used for both PGP and OTR communication. Using "one" Domain + Server + IP address + OpenFire CMS. Server should also accept; - File Transfers - Media Transfers - Share vCards - SSL / TLS - Groupchat And of course, server should be highly secured. Ready in one day. Budget $100.

    $116 (Avg Bid)
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    4 bids

    Please take note of the following: 1. We want our Blockchain to be compatible with all programming and coding languages just like ANTSHARES and not like ETHEREUM which works only with SOLIDITY, as this will enable us generate a larger following of users and miners. 2. We want our Blockchain to have the ability to combine gas/fees, smart contracts and DApps like in ETHEREUM and ANTSHARES. 3. We want our Blockchain to be both non browser-based and browser-based, just like NIMIQ. 4. Our Blockchain should be developed to have Cross-Chain Interoperability just ANTSHARES. 5. It's a FINTECH Blockchain that functions like Ripple for instant low cost crypto and fiat money transfer But decentralised Unlike Ripple As It's for 1. For Fiat and Crypto bank transfers just like SWIFT BIC So we need the banks to adopt the technology Just like Ripple And for smart contracts like Ethereum I'm looking for something [url removed, login to view] [url removed, login to view] and with [url removed, login to view] similar to launch while new coin Algorithm is in development. for more information I would like you to please go through the initial whitepaper attached in the attachment. Please note I would need your full profile and that of any member of your team that would work on our project. Tell me how much you will take to handle everything for me. Coin, Blockchain, API and any other thing required full package

    $2222 - $3703
    Sealed
    $2222 - $3703
    9 bids

    Expert in blockchain required to write a white paper for upcoming ICO that can explain the technical side of the idea. Architecture, design, and implementation of a blockchain environment including but not limited to the consensus layer, distributed ledger, and smart contracts layer.

    $1374 (Avg Bid)
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    23 bids
    ICO white paper -- 2 Ended
    VERIFIED

    Expert in blockchain required to write a white paper for upcoming ICO that can explain the technical side of the idea. Architecture, design, and implementation of a blockchain environment including but not limited to the consensus layer, distributed ledger, and smart contracts layer.

    $1418 (Avg Bid)
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    19 bids

    1. Minimum 4 languages 2. Three fiat currencies. 3. Option of test environment (see and test software modifications without influencing real exchange) 4. Distributed shared orderbook. 5. Market Marker. (Create artificial liquidity using artificial trading accounts) [url removed, login to view] plugin for E-commerce 7. Visually pleasing, user friendly. 8. Currency conversion bar - from fiat currency to crypto currency. (E.g : How many bitcoins can I get for my 10 dollars)

    $24 / hr (Avg Bid)
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    14 bids

    ONLY APPLY IF YOU HAVE PRIOR CRYPTOCURRENCY EXP We are looking to create (FAST) a new cryptocurrency and need an experience cryptocurrency developer that can develop/build a Bitcoin alternative coin This should be very straightforward for someone with experience in C and Bitcoin (Crypto Currency and Alt-Coins) hence the size of the project. This would be like a hybrid Litecoin with a few improvements we would want added to it. We will need to have a certain release date and we need it FAST. We also want to make it 100 % coins will be premined. This project is nothing fancy, just taking the source code and changing the parameters to it. The winner will be given the new parameters after having a few initial discussions. We ALSO need skilled programmers with the PROFESSIONAL knowledge to created and maintain this new currency, implement ideas and create new features as well. We also want to register this coin with any 2 famous exchange just like nova exchange or any one else. Please ONLY BID if you can create this quickly and have A LOT of Experience and Skills in Crypto Currencies and Bitcoin (alt-coins).

    $2575 (Avg Bid)
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    Purchase already developed bitcoin exchange site (Do not develop new) But I hope to purchase the system already developed Hope site function ==> [url removed, login to view] Bit Coin Exchange Site development and All features * admin panel * Multilingual Language System (english and Portuguese and etc..) * Site response * wallet (Be able to send and receive bit coins.) * Bit coin buy and sale menu * transaction (buy and sale fee calculated automatically * Real-time display of exchange rates * and etc... I do not want to develop new. If you have already developed a similar site I will buy your site. And I will develop some additional functions. My budget is $ 1,500.

    $1715 (Avg Bid)
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    10 bids

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