Cryptography Jobs and Contests

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 Cryptography Developers on Freelancer
Sign up and start earning
Signup to start earning Are you a Cryptographer? You could be earning money working on these jobs!

Browse Jobs on Freelancer

Project/Contest Description Bids/Entries Skills Started Ends Price (CAD)
cryptography and security building an online market exchange monitoring and trading platform and need expert advice on security architectures (cryptography) for money transfer activities 0 Cryptography, CUDA, Machine Learning, SAS, Artificial Intelligence Jan 20, 2017 Today6d 20h -
Build a Website With Cryptocurrency coding experience needed Need a Good Cryptocurrency Coder To hire for long term work.. 26 PHP, Javascript, Cryptography, HTML5, Bitcoin Jan 20, 2017 Today6d 13h $27
Create Keygen for a simple .exe program I have a single .exe program that generate an ID and ask for a KEY based in this ID. I need a key generator that receives the ID and return an valid key! 13 C++ Programming, Computer Security, Cryptography, Debugging, x86/x64 Assembler Jan 20, 2017 Today6d 7h $57
Write some Software Please do not bid unless you are familiar with the Subset cover scheme. Required: Subset cover scheme implemented into a BST in C++. Code for BST already developed and so only scheme needs implementation. 8 Algorithm, Software Architecture, Mac OS, Cryptography, C++ Programming Jan 19, 2017 Jan 19, 20175d 17h $67
Writing a DLL (must use unique identifier, un-changeable) Basically, I'm searching for someone to create a DLL for my game, the whole idea of this is to send a unique identifier to limit the user (logging only 2) based on that unique identifier and the data will be sent through packet (already prepared) I did have someone create a DLL before and it was based on getting System Serial Number (GetVolumeInformation) and sadly it was bypassed via [url... 8 Computer Security, Objective C, Cryptography, C++ Programming, Assembly Jan 17, 2017 Jan 17, 20173d 18h $230
sophos central encryption rtghth 5 PLC & SCADA, Desktop Support, Cryptography, Red Hat, OpenSSL Jan 16, 2017 Jan 16, 20172d 14h $802
Key Vaulting I am looking for a freelancer to help me with my project. The skills required are AZURE KEYVAULTING I HAVE ATTACHED 2 FILES THEY NEED TO BE REPLICATED IF YOU CAN DO THIS AND THE FILES WORK I WILL HIRE YOU INFIDELITY LONG TERM INCOME. POTETNIAL OF EARNING IS NLIMITED 5 Quantum, Cryptography Jan 15, 2017 Jan 15, 20171d $259
I need Natural Language Processing Expert on very urgent basis I am looking for a freelancer to help me with my project. The skills required are Artificial Intelligence, Cryptography, Machine Learning, Map Reduce and Natural Language. I am happy to discuss with him/her the budget. I have not provided a detailed description of my project as its very confidential as of now and nor have uploaded any files. So please contact me back urgently whoever is interested... 10 Cryptography, Machine Learning, Natural Language, Map Reduce, Artificial Intelligence Jan 13, 2017 Jan 13, 2017Ended $240
Build a miningpool for some cryptocurrencies! I wanna buid a miningpool like [url removed, login to view] or [url removed, login to view]! 22 PHP, Linux, Software Architecture, Cryptography, JSON Jan 13, 2017 Jan 13, 2017Ended $4483
Cryptanalysis Hello, I want you to teach me as much as possible about cryptanalysis technique. Thank you. 5 Cryptography Jan 13, 2017 Jan 13, 2017Ended $326
photo recovery from s tab Photo recovery from Samsung Tab S 8 Video Services, Microsoft Exchange, Cryptography, Video Production, Video Editing Jan 11, 2017 Jan 11, 2017Ended $1025
Hacking Issue I am looking for a freelancer to help me with my project. I have booking site and there is script generated which taking automatic bookings. I need to stop this urgently. Please the best guy assist me for this. Regards, CG 21 Web Security, Troubleshooting, Cryptography, VMware, Internet Security Jan 11, 2017 Jan 11, 2017Ended $368
Implement Vigenere Cipher (computer security and cryptograph) Implement the Encryption and Decryption algorithms for the Vigenere Cipher in Python or C or Java. Your program should take as an input the (key,plaintext) from the terminal or from a file. It should output the decrypted text. Run your program for different plaintext and key length. Your code should include necessary information for the reader to understand the code. 15 PHP, Computer Security, Software Architecture, Cryptography Jan 10, 2017 Jan 10, 2017Ended $41
Encrypt and decrypt data like the title says i want an script or program to decrypt and encrypt data and files 35 Java, Javascript, JavaFX, Oracle, Cryptography Jan 9, 2017 Jan 9, 2017Ended $163
RESEARCH MATRIX EVOLUTION CODER Research a decoder that: breaks: 2048 digit code in less than 1 second.... Also on the flip side: allows to encrypt a [url removed, login to view] digit password.... with randomized variables.... Allow it to be able to be downloaded and applied to any computer or network, server: including secure... also a software for encoding personal files, securing entire hard drives and individual as well as ... 7 Research, Computer Security, Codeigniter, Cryptography, LiveCode Jan 8, 2017 Jan 8, 2017Ended $280
Diffie-Hellman, cryptographic hash functions on computer security cryptography It is tempting to try to develop a variation on Diffie-Hellman that could be used as a digital signature. Here is one that is simpler than DSA and that does not require a secret random number in addition to the private key. Public elements: q prime number a a < q and a is a primitive root of q Private key: X X < q Public key: Y = a X mod q To sign a message M, compute h = H(M), the ... 11 Engineering, Computer Security, Technical Writing, Academic Writing, Cryptography Jan 7, 2017 Jan 7, 2017Ended $75
searching computer security and cryptography well knowledge person for checking my finished project. i am working on one project. I ALMOST finish MY PROJECT. i just need somebody who is very good at about computer security and cryptography. i need help and last control.. 8 PHP, Computer Security, Software Architecture, Cryptography Jan 7, 2017 Jan 7, 2017Ended $36
Algorithm, Cryptography, Linux Expert Required Hi, I need the expert in Algorithm, Cryptography, Linux domain. Details will be shared later. 18 Linux, Algorithm, Cryptography Jan 6, 2017 Jan 6, 2017Ended $162
Write some Software ethereum, solidity, smart contracts, blockchain 7 Software Architecture, Cryptography Jan 6, 2017 Jan 6, 2017Ended $26
JULIA And Algorithm Expert Required JULIA And Algorithm Expert Required 7 Linux, Algorithm, Cryptography Jan 6, 2017 Jan 6, 2017Ended $107
Linux, Algorithm, Cryptography Jan 6, 2017 Jan 6, 2017Ended
A cryptographer with good knowledge on computer security is needed now As described above, i need someone with knowlegge on this. Further details to be provided on chat 9 Engineering, Computer Security, Software Architecture, Cryptography Jan 5, 2017 Jan 5, 2017Ended $33
A cryptographer with good knowledge on computer security is needed -- 2 As described above, i need someone with knowlegge on this. Further details to be provided on chat 3 Engineering, Computer Security, Software Architecture, Cryptography Jan 5, 2017 Jan 5, 2017Ended $49
A cryptographer with good knowledge on computer security is needed As described above, i need someone with knowlegge on this. Further details to be provided on chat 4 Engineering, Computer Security, Software Architecture, Cryptography Jan 5, 2017 Jan 5, 2017Ended $478
AUTHENTICATION & COMPUTER SECURITY Please look at the attached files thoroughly , you will need to pick 5 questions and write an in-depth answer with a minimum of have a page and a maximum of a full page. 6 Computer Security, Cryptography, Word Processing Jan 5, 2017 Jan 5, 2017Ended $74
Table based implementation of AES (reference openssl) The Advanced Encryption Standart (AES) was published by the National Insitute of Standarts and Tech- nology (NIST) in 2001. AES is a symmetric block cipher that is intended to replace DES (Data Encryption Standart) as the approved standart for a wide range of applications. AES operates on (8-bit) bytes and uses arithmetic in the finite field GF(28), with the irreducible poly- nomial m(x) = x8 + x... 4 PHP, Computer Security, Software Architecture, Cryptography Jan 5, 2017 Jan 5, 2017Ended $163
algorithms this is problem in NP-complete >> intractable problem algorithm I need one who can solve this problem 16 Matlab and Mathematica, Algorithm, Cryptography, CUDA, Machine Learning Jan 5, 2017 Jan 5, 2017Ended $44
I would like to hire a Cryptographer I have a series of code and need to solve it. 9 PHP, Software Architecture, Cryptography, HTML, Software Development Jan 4, 2017 Jan 4, 2017Ended $284
table based implementation of AES (reference openssl)COMPUTER SECURITY AND CRYPTOGRAPHY The Advanced Encryption Standart (AES) was published by the National Insitute of Standarts and Tech- nology (NIST) in 2001. AES is a symmetric block cipher that is intended to replace DES (Data Encryption Standart) as the approved standart for a wide range of applications. AES operates on (8-bit) bytes and uses arithmetic in the finite field GF(28), with the irreducible poly- nomial m(x) = x8 + x... 5 PHP, Computer Security, Software Architecture, Cryptography Jan 4, 2017 Jan 4, 2017Ended $36
Academic Writing I have some cryptography questions that has to be researched and answered half page each 27 Research, Academic Writing, Cryptography Jan 3, 2017 Jan 3, 2017Ended $140
Decrypt JPEG fotos I have 12 JPEG photos that have been encrypted with unknown software. These photos were taken with an iPhone 5s. I need for these photos to be decrypted so that the images are visible. Currently the images show as a solid colour. 14 Perl, Python, Algorithm, Cryptography, Programming Jan 2, 2017 Jan 2, 2017Ended $188
information security טוב, מחפש אנשים, יותר נכון יש לי מקום רק ל-2 לחברה בתחום אבטחת מידע לא משנה לי ניסיון ולא משנה תואר, העיקר הביצועים יהיה מבחן שיצטרכו לעבור בהתחלה ורק אח"כ ראיון מי שעובד במקום מסוים אין זה מפריע התשלום לפי היקף עבודה 19 PHP, Python, Linux, Software Architecture, Cryptography Jan 2, 2017 Jan 2, 2017Ended $1583
Urgent: basic online encrypted communication script -- 2 I urgently need a simple UI PHP script that can create a transaction ID (payment), allocate an OTP number to it and then use this OTP number as a hash/verification to recognize transaction details, and then use the user's digital certificate to send an encrypted and signed communication back to the server (to confirm transaction). This is for a demo/prototype/proof-of-concept and not for a... 19 PHP, Cryptography, MySQL Jan 2, 2017 Jan 2, 2017Ended $262
Urgent: basic online encrypted communication script I urgently need a simple UI PHP script that can create a transaction ID (payment), allocate an OTP number to it and then use this OTP number as a hash/verification to recognize transaction details, and then use the user's digital certificate to send an encrypted and signed communication back to the server (to confirm transaction). This is for a demo/prototype/proof-of-concept and not for a... 7 PHP, Cryptography, MySQL Jan 1, 2017 Jan 1, 2017Ended $271
Mobile Phone, Android, Cryptography Dec 30, 2016 Dec 30, 2016Ended
scrap some data from website is using a cryptography system called , ember i have website is using a cryptography system called , ember , that generate a session number with a key to protect data to scrap from unauthorized sources, currently i need to crack that to scrap data from it 25 Web Security, Web Scraping, Cryptography, Growth Hacking, Ember.js Dec 29, 2016 Dec 29, 2016Ended $190
RAT ( Remote Administrator Tool ) Project. C++ Professionals ONLY This RAT must be coded from scratch and by your OWN SKILLS , DO NOT COPY ANY FUNCTION OR CODE FROM THE INTERNET , I'm DEVELOPER and I know What I am looking for and if any code is copied I will not accept it at all. I need very expert guy to do this , Please I do not want someone with no experience in doing RAT before because I will have headache to make him understand me. 22 Cryptography, C++ Programming Dec 28, 2016 Dec 28, 2016Ended $2142
Setup Android github project with the backend fully working So I have this github project that I need someone who can setup. 16 Mobile Phone, Android, Cryptography Dec 27, 2016 Dec 27, 2016Ended $77
Write an Android application I need an android application about speech encryption using Lorenz chaotic systems. The app encrypt speech in real-time and send on data transmission line, same app in receiver mobile device decrypt speech in real-time and play. It must be java android app. 8 Mobile Phone, Android, Cryptography Dec 25, 2016 Dec 25, 2016Ended $286
Add END TO END ENCRYPTION on a current android chatting application. I currently have a working android chatting application with login and register function etc. I just want to rework the chatting and make it end to end encrypted and remove the server between so messages never get stores anywhere. 25 Mobile Phone, Android, Computer Security, Cryptography Dec 25, 2016 Dec 25, 2016Ended $407
Crypto-currency Hi, I have an altcoin, built as following so far - MacOS, Windows wallet - Blockchain explorer - Proof of stake + Proof of work coin - using SHA256 I need a second opinion reviewing the work on this coin. Please send your offers. Potentially if your response helps, following we might need to create also web app wallet, android, iOs wallet, build node for this coin. Or creating a n... 29 Android, Cryptography Dec 23, 2016 Dec 23, 2016Ended $2035
Creating a cryptographic role based access control system I need to create a software that is described in section 5.2 of the paper i uploaded. It is a cryptographic enforced role based access control system. I will need it to be implemented and also test its feasibility (how it performs). 8 Java, Computer Security, Software Architecture, Cryptography Dec 22, 2016 Dec 22, 2016Ended $267
Unlocking Files Of Ransomware Ransomware has locked some files on my computer and I need to have it unlocked. All the files are seen as rar files but has .exe extension. 7 Web Security, Computer Security, Cryptography, Internet Security Dec 21, 2016 Dec 21, 2016Ended $689
Building small C++ modules and finish website. Audio vst plugins built on modular system. I still need some small modules and to finish the webpage to complete the project. 12 Cryptography, C++ Programming Dec 20, 2016 TodayEnded $276
Need Blockchain Developer • Experience with programming languages such as C, C++ or Go, and with RDBMS or NoSQL databases • Proven expertise in implementing Blockchain frameworks and business applications, as well as cryptographic protocols and crypto libraries • Ability to work with remote developers, and agile or scrum • Knowledge of symmetric and asymmetric cryptogr... 10 Cryptography, NoSQL Couch & Mongo, C++ Programming Dec 20, 2016 TodayEnded $71
Academic Writing writing a academic document describing the wireless communication using Microcontroller the project is about using 2 raspberry Pi3 devices which will send and receive massages via the wireless communication. these msg are encrypted and decrypted using cipher. the code for the project is already written so all I need is describing the code and the security issues. the covered area is: the implem... 34 Python, Engineering, Technical Writing, Academic Writing, Cryptography Dec 19, 2016 Dec 19, 2016Ended $255
SAS 10 Cryptography, Machine Learning, SAS, Hadoop, Crystal Reports Dec 18, 2016 Dec 18, 2016Ended $407
Card Emu Devlopper Hi, looking for any one Can devloppe our Card emu . 0 Cryptography Dec 17, 2016 Dec 17, 2016Ended -
cryptography and Internet Security -- 2 i need to fix a report and a certificate in cryptography and Internet Security 1 Web Security, Cryptography, Internet Security Dec 17, 2016 Dec 17, 2016Ended $33
Custom Cryptocurrency with Premine. I need a custom cryptocurrency developed and premined. 5 PHP, Software Architecture, Cryptography Dec 17, 2016 Dec 17, 2016Ended $471
Showing 1 to 50 of 64 entries
« 1 2 »