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Hire the Best Cryptographers

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4.8/5
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Sirnabeel K.

Delhi, India

$15/hr
5.0
1 jobs

I specialize in blockchain investigations with experience in financial crime analysis and multi-chain risk mitigation. My work focuses on safeguarding financial platforms from sophisticated virtual asset threats through advanced blockchain analytics tools and a deep understanding of illicit crypto activities. I conduct thorough investigations into fraud schemes, money laundering, and sanctions evasion, ensuring compliance with global anti-money laundering (AML) regulations. My expertise includes asset tracing across multiple chains and proactive monitoring of high-risk wallets linked to illicit activities. If you need a professional who can navigate the complexities of cryptocurrency security and compliance, let's connect to discuss how I can protect your financial interests.

  • Legal
  • Blockchain
  • Digital Forensics
  • Anti-Money Laundering
  • Chainalysis KYT
  • Elliptic Curve Cryptography
  • Blockchain, NFT & Cryptocurrency
  • Crypto Marketing
  • Cryptocurrency
  • Transaction Processing
  • Risk Assessment
  • Due Diligence
  • Regulatory Compliance
  • Know Your Customer
  • Fraud Detection
Vishal B.

Bhavnagar, India

$50/hr
4.4
53 jobs

Experienced Blockchain Developer with a demonstrated history of working in the information technology and services industry. Skilled in ethereum, hyperledger,smart contract, C++, RPC, Go, and Wallets. Strong engineering professional with a Cyber Security focused in masters of engineering

  • Cybersecurity Management
  • Penetration Testing
  • AT&T Cybersecurity
  • Research Papers
  • Research & Development
  • Ethereum
  • Smart Contract
  • Web Application Security
  • Web Application
  • Solidify
  • Blockchain Development
  • Blockchain
  • Blockchain Architecture
  • Rust
  • web3.js
Gia D.

Vinh Binh, Dong Tháp, Vietnam

$50/hr
5.0
2 jobs

BACKGROUND: Quantum computing researcher with hands-on experience developing and deploying data science models on real quantum hardware. Achieved 96.1% correctness on IBM quantum systems with expertise in quantum machine learning, classification algorithms, and optimisation techniques. A proven track record in Python-based data pipelines, statistical modelling, and cross-functional collaboration. Experienced in translating complex technical problems into practical solutions with measurable business impact.

  • Cryptography
  • Information Security
  • Data Analytics
  • Quantum Computing
  • Quantum Workplace Goals
  • Database
  • Network Engineering
  • Sales Management
  • Price & Quote Negotiation
  • Relationship Management
  • Customer Service
Muhammad S.

Swat, Pakistan

$15/hr
5.0
61 jobs

Hi there! I'm Muhammad Shahid a cryptographer, cybersecurity specialist, and software developer with a strong mathematical foundation in complexity theory and algorithm design. I hold a master's degree in mathematics and a bachelor's degree in computer science, and I've spent several years applying my expertise to advanced research and real-world projects across both academia and industry. I specialize in: Cryptography & Security Protocols designing and implementing cryptographic algorithms, proofs, and secure systems. Blockchain & Decentralized Systems applying cryptographic primitives to smart contracts, consensus, and secure distributed applications. Software Development proficient in Python, C, Go, and MATLAB for cryptographic computation, data analysis, and system design. Algorithm Design & Analysis optimizing performance and reasoning rigorously about computational complexity. I'm a fast learner who thrives in collaborative environments and enjoys tackling intellectually challenging problems. My work focuses on precision, efficiency, and secure, elegant solutions grounded in solid mathematical reasoning. If your project involves cryptography, blockchain, security engineering, or complex algorithmic computation, I'd love to discuss how I can help bring your idea to life. Let's connect and build something exceptional.

  • Cryptography
  • MATLAB
  • Mathematics
  • Elliptic Curve Cryptography
  • Python
  • Mathematical Software
  • Blockchain Security
  • Golang
  • C
  • Security Analysis
  • Mixed Integer Linear Programming
Tajammal H.

Padova, Italy

$40/hr
5.0
19 jobs

𝐈 𝐡𝐞𝐥𝐩 𝐨𝐫𝐠𝐚𝐧𝐢𝐳𝐚𝐭𝐢𝐨𝐧𝐬 𝐢𝐝𝐞𝐧𝐭𝐢𝐟𝐲 𝐯𝐮𝐥𝐧𝐞𝐫𝐚𝐛𝐢𝐥𝐢𝐭𝐢𝐞𝐬, 𝐬𝐞𝐜𝐮𝐫𝐞 𝐢𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞, 𝐢𝐦𝐩𝐥𝐞𝐦𝐞𝐧𝐭 𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐜𝐨𝐧𝐭𝐫𝐨𝐥𝐬, 𝐜𝐨𝐧𝐝𝐮𝐜𝐭 𝐩𝐞𝐧𝐞𝐭𝐫𝐚𝐭𝐢𝐨𝐧 𝐭𝐞𝐬𝐭𝐢𝐧𝐠, 𝐬𝐭𝐫𝐞𝐧𝐠𝐭𝐡𝐞𝐧 𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐩𝐨𝐬𝐭𝐮𝐫𝐞, 𝐚𝐧𝐝 𝐦𝐞𝐞𝐭 𝐫𝐞𝐠𝐮𝐥𝐚𝐭𝐨𝐫𝐲 𝐜𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 𝐫𝐞𝐪𝐮𝐢𝐫𝐞𝐦𝐞𝐧𝐭𝐬 𝐭𝐡𝐫𝐨𝐮𝐠𝐡 𝐩𝐫𝐚𝐜𝐭𝐢𝐜𝐚𝐥, 𝐡𝐚𝐧𝐝𝐬-𝐨𝐧 𝐜𝐲𝐛𝐞𝐫𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐞𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞. As a 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐜𝐲𝐛𝐞𝐫𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐩𝐫𝐨𝐟𝐞𝐬𝐬𝐢𝐨𝐧𝐚𝐥 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝟏𝟎+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞, I have successfully delivered cybersecurity, compliance, risk assessment, security architecture, infrastructure security, and penetration testing projects for startups, SMBs, and growing organizations across multiple industries. My approach combines technical execution with security best practices to help clients reduce risk, protect critical assets, and build secure environments that support business growth. 𝐔𝐧𝐥𝐢𝐤𝐞 𝐜𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐧𝐭𝐬 𝐰𝐡𝐨 𝐨𝐧𝐥𝐲 𝐩𝐫𝐨𝐯𝐢𝐝𝐞 𝐫𝐞𝐜𝐨𝐦𝐦𝐞𝐧𝐝𝐚𝐭𝐢𝐨𝐧𝐬, 𝐈 𝐰𝐨𝐫𝐤 𝐡𝐚𝐧𝐝𝐬-𝐨𝐧 𝐭𝐡𝐫𝐨𝐮𝐠𝐡𝐨𝐮𝐭 𝐭𝐡𝐞 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐥𝐢𝐟𝐞𝐜𝐲𝐜𝐥𝐞—𝐟𝐫𝐨𝐦 𝐚𝐬𝐬𝐞𝐬𝐬𝐦𝐞𝐧𝐭 𝐚𝐧𝐝 𝐩𝐥𝐚𝐧𝐧𝐢𝐧𝐠 𝐭𝐨 𝐢𝐦𝐩𝐥𝐞𝐦𝐞𝐧𝐭𝐚𝐭𝐢𝐨𝐧, 𝐫𝐞𝐦𝐞𝐝𝐢𝐚𝐭𝐢𝐨𝐧, 𝐝𝐨𝐜𝐮𝐦𝐞𝐧𝐭𝐚𝐭𝐢𝐨𝐧, 𝐭𝐞𝐬𝐭𝐢𝐧𝐠, 𝐚𝐧𝐝 𝐟𝐢𝐧𝐚𝐥 𝐝𝐞𝐥𝐢𝐯𝐞𝐫𝐲. 𝐂𝐨𝐫𝐞 𝐀𝐫𝐞𝐚𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: ✔ Information Security & Cybersecurity Management ✔ Security Architecture & Security Engineering ✔ Penetration Testing & Vulnerability Assessment ✔ Security Assessment, Testing & Remediation ✔ Risk Assessments & Information Security Audits ✔ Cloud Security & Infrastructure Security ✔ Network Security, Network Engineering & Hardening ✔ System Administration & Infrastructure Management ✔ User Identity Management & Access Control ✔ Incident Response Readiness & Threat Mitigation ✔ DevOps Engineering & Security Best Practices ✔ Security Policies, Procedures & Documentation ✔ OSINT & Digital Forensics 𝐂𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 & 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: ✔ ISO 27001 ✔ SOC 2 ✔ PCI DSS ✔ NIST Cybersecurity Framework ✔ HIPAA ✔ GDPR ✔ CMMC 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞: ✔ 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐟𝐫𝐞𝐞𝐥𝐚𝐧𝐜𝐞𝐫 𝐰𝐢𝐭𝐡 𝐩𝐫𝐨𝐯𝐞𝐧 𝐬𝐮𝐜𝐜𝐞𝐬𝐬 𝐢𝐧 𝐜𝐲𝐛𝐞𝐫𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 & 𝐜𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 ✔ Hands-on technical expertise with end-to-end project ownership ✔ Strong experience across cybersecurity, compliance, infrastructure, and security operations ✔ Practical, business-focused security solutions rather than generic recommendations ✔ Clear communication, reliability, and commitment to quality Whether you need penetration testing, vulnerability assessments, security architecture, compliance implementation, cloud security, network security, system administration, risk assessments, infrastructure hardening, or end-to-end cybersecurity support, I can help deliver secure, practical, and scalable solutions tailored to your requirements. 𝐋𝐞𝐭'𝐬 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐡𝐨𝐰 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐬𝐞𝐜𝐮𝐫𝐞 𝐚𝐧𝐝 𝐬𝐭𝐫𝐞𝐧𝐠𝐭𝐡𝐞𝐧 𝐲𝐨𝐮𝐫 𝐞𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭.

  • Information Security
  • Cybersecurity Management
  • Penetration Testing
  • Vulnerability Assessment
  • Cyber Threat Intelligence
  • Security Assessment & Testing
  • Ethical Hacking
  • Security Engineering
  • Information Security Audit
  • Network Penetration Testing
  • Web App Penetration Testing
  • OWASP
  • Risk Assessment
  • Compliance
  • Digital Forensics
  • Email Security
  • Cloud Security
  • Security Policies & Procedures Documentation
  • IT Compliance Audit
  • Information Security Governance
Friederike L.

Niederzissen, Germany

$5/hr
4.8
33 jobs

I'm a full-blooded mathematician with scientific background in math, physics and computer science and basically interested in everything. :-) I worked for several years at university, did my PhD in the field of statistical image and data analysis, gave lectures and tutorials and supervised several students and theses. I'm very familiar with Boolean and linear algebra, analysis, probability theory, statistics, linear and nonlinear (convex) optimization and of course image and data analysis. Now, I'm working in the field of IT security, especially cryptography and side-channel analysis with machine learning and AI methods. Besides math (or more general, science), I‘m personally very interested in sports, fitness and health topics. I like to help with math assignments or programming tasks (including reimplementing the results of papers, e.g. in Python, R or Matlab), proofreading publications or theses, writing résumés and typing/formatting texts with LaTeX, and creating graphics with Tikz. Furthermore, due to my background in image processing, I have comprehensive experience in photo and video editing. As a native German I‘m happy to support in any translation or proofreading tasks involving German. At school I studied Latin for 9 years and really like the language, so I gladly offer any kind of support here as well. I’m also fluent in English and Swedish. Furthermore, I love writing calligraphy and handlettering and would be happy to realize your individual project. As I like thinking about mathematical problems, I enjoy solving logical quizzes, puzzles, riddles etc. and will be happy to support you with any kind of related projects (e.g. reviewing them for correctness, difficulty, clearity,…). Finally, I can also assist with tasks regarding the German tax system (e.g. Elster online, tax returns, VAT).

  • Mathematics
  • Mathematics Tutoring
  • Mathematical Modeling
  • Scientific Research
  • Scientific Writing
  • Academic Writing
  • Academic Editing
  • Academic Proofreading
  • Exam Preparation
  • Exercises & Supporting Materials
  • Ghostwriting
  • LaTeX
  • TikZ
  • German
  • Latin

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How to Hire Top Cryptographers

How to hire cryptographers

Need help securing IT and computer systems through algorithms, ciphers, and encryption? Or are you trying to decrypt a secure file to access its contents? Cryptographers are here to help. 

So how do you hire cryptographers? What follows are some tips for finding top cryptography consultants on Upwork.

How to shortlist cryptography professionals

As you’re browsing available cryptography consultants, it can be helpful to develop a shortlist of the professionals you may want to interview. You can screen profiles on criteria such as:

  • Technology fit. You want a cryptographer who understands the technologies behind the IT or computer system you wish to encrypt or decrypt.
  • Project experience. Screen candidate profiles for specific skills and experience (e.g., securing blockchain transactions with cryptographic hash functions in your supply chain management system).
  • Feedback. Check reviews from past clients for glowing testimonials or red flags that can tell you what it’s like to work with a particular cryptographer.

How to write an effective cryptography job post

With a clear picture of your ideal cryptographer in mind, it’s time to write that job post. Although you don’t need a full job description as you would when hiring an employee, aim to provide enough detail for a contractor to know if they’re the right fit for the project.

Job post title

Create a simple title that describes exactly what you’re looking for. The idea is to target the keywords that your ideal candidate is likely to type into a job search bar to find your project. Here are some sample cryptographer job post titles:

  • Cybersecurity consultant experienced encrypting/decrypting files with AES
  • Seeking a blockchain cryptography expert to help implement a smart contract system with Hyperledger
  • Need an ethical hacker to decrypt IT systems infected by ransomware

It’s worth noting that you will rarely find freelancers branding themselves as cryptographers. Based on your cryptography needs, your title should be more specific and target the type of professional who is relevant to your job post. 

Cryptography project description

An effective cryptography job post should include: 

  • Scope of work: From recovering locked files to beefing up security with encryption, list all the deliverables you’ll need. 
  • Project length: Your job post should indicate whether this is a smaller or larger project. 
  • Background: If you prefer experience with certain industries, technologies, and cryptography specializations, mention this here. 
  • Budget: Set a budget and note your preference for hourly rates vs. fixed-price contracts.

Cryptographer responsibilities

Here are some examples of cryptographer job responsibilities:

  • Identify and patch weaknesses in existing cryptography-based security systems
  • Design and implement technology-specific encryption solutions (e.g., cryptographic hash functions for blockchain implementations)
  • Create a cybersecurity plan for following encryption/decryption best practices

Cryptographer requirements and qualifications

Be sure to include any requirements and qualifications you’re looking for in a cryptographer. Here are some examples:

  • Cryptography
  • Cybersecurity
  • Mathematical/statistical analysis
  • A working knowledge of algorithms, ciphers, and encryption technologies
  • Platform-specific experience with the computer and IT systems of your project (e.g., AWS cloud infrastructure)

Cryptographers FAQ

Frequently asked questions

What is cryptography?

Cryptography is the study of information and communication security techniques. While the practice of securing communications through coded messages is nothing new, today’s cryptographers leverage computer science and mathematical concepts to encrypt and decrypt information. Cryptography plays a major role in securing communications between IT infrastructure, computer systems, and software. It’s also one of the foundational technologies behind blockchain, a distributed ledger system that secures its transactions through cryptographic hash functions.

How much does it cost to hire a cryptographer?

The first step to determining the cost to hire a cryptographer will be to define your needs. Rates can vary due to many factors, including expertise and experience, location, and market conditions.

Cost factor #1: project scope

The first variable to consider when determining scope is the nature of the work that needs to be completed. Not all cryptography projects are created equal. Setting up basic encryption keys to handle authentication within a mobile app will typically take less time than creating your cryptographic system for a new blockchain technology. 

Tip: The more accurately your job description describes the scope of your project, the easier it will be for talent to give you accurate cost estimates and proposals.

Cost factor #2: cryptography experience

Choosing the right level of expertise for the job is closely tied to how well you determined the scope of your project. You wouldn’t need an advanced cryptographer to leverage an existing blockchain technology such as Ethereum to set up a single smart contract. On the other hand, decrypting your company’s files after a ransomware attack will require an expert ethical hacker. 

Beyond experience level, you need to consider the type of experience the talent possesses. The following table breaks down the rates of the typical types of cryptographers you can find on Upwork.

Rates charged by cryptographers on Upwork

Types of Cryptographers

Description

Hourly Rate

Cybersecurity consultant 

Leverages ciphers, algorithms, and encryption solutions to secure communications between IT infrastructure, software, and devices.

$30-80+

Blockchain expert

Leverages cryptography to design and implement blockchain solutions such as cryptocurrencies, smart contracts, and smart supply chains. 

$40-80+

Ethical hacker

Leverages cryptography to decrypt files, recover lost data, or harden security systems through security testing. 

$60-90+


 

Cost factor #3: location

Location is another variable that can impact a cryptographer’s cost. It’s no secret that you can leverage differences in purchasing power between countries to gain savings on talent. But it’s also important to factor in hidden costs such as language barriers, time zones, and the logistics of managing a remote team. The real advantage to sourcing talent remotely on Upwork is the ability to scan a global talent pool for the best possible person for the job. Location is no longer an obstacle. 

Cost factor #4: independent contractor vs. agency

The final variable regarding talent cost is hiring an independent contractor vs. an agency. An agency is often a “one size fits all” model, so you’ll often have access to a designer, a project manager, an engineer, and more. When hiring individuals you have total autonomy regarding who is responsible for which part of the project, but you’ll need to source each of those skills separately.

The trade-off between hiring individuals vs. hiring an agency is the level of administrative overhead you incur personally in coordinating tasks among all members of the team. Project scope and personal preference will determine which style is a better fit for your needs.

Cryptography Tips and Best Practices

Encrypt sensitive information in transit

Sensitive data such as personally identifiable information (PII), transactions, and trade secrets should be safeguarded by encryption whenever possible. When information is in transit, such as through API gateways between apps via transport protocols (e.g., HTTP), an encryption protocol such as TLS (transport layer security) should be used. 

Consider end-to-end encryption (E2EE)

As important as it is to secure information in transit, it’s also important to consider mapping your entire encryption strategy to cover all points across an encryption path including the endpoints. 

Cryptographic keys used to encrypt messages and are stored exclusively at the endpoints. Normally a file can only be decrypted if it can obtain the public key of the other endpoint. However, it’s possible to perform a man-in-the-middle attack in which the decoding key is intercepted in transit to the other player. 

The solution is to use public and private keys to ensure two parties are able to exchange keys with each other without exposing the keys to malicious third parties. If you encrypt a message with your public key, only someone with a matching private key can decrypt it. 

The recipient shares their public key with you to allow you to send an encrypted message to them. This is done to identify both parties. There are many types of E2EE, each with its own weaknesses and strengths, using this concept of public and private key pairs to verify the identity of the other side of a transaction. 

Determine if decentralized E2EE is preferred

There are many aspects of business and industry that ultimately boil down to transactions in a ledger. Sometimes those transactions are financial; other times the transactions are the transfer of information between two parties. With the advent of the blockchain, security specialists have begun to explore its applications to encryption protocols. 

Conventional E2EE messaging apps rely on centralized systems to handle the identity validation of senders and receivers in encrypted transactions. The public key serves as the encryption key and is published to a trusted centralized authority to allow others to send encrypted messages to the owner of the public key. From the perspective of a sender, ownership of the public key is verified by this trusted centralized authority. The centralized authority is responsible for preventing a man in the middle from masquerading as the owner of the public key. But what happens if something about the nature of your data means you can’t trust a third-party centralized authority? 

You can use a blockchain, a distributed ledger technology (DLT), to ensure information transactions are validated for both senders and receivers. Combine DLT with encryption and you get a decentralized public key infrastructure (DPKI). Here’s how it works:

  • Digital signatures consist of two keys: a signing key (private key) and a verification key (public key).
  • Digital signatures for information transactions are recorded on a blockchain as pairs.
  • Anyone can write to the blockchain, which uses cryptography to make it computationally infeasible to alter. 
  • Since the blockchain of information transactions is immutable, and everyone has a copy of the blockchain, it becomes computationally infeasible to commit fraud.

In this way it’s possible to enhance the security of your encryption scheme by relying on the cryptography and transparency of a blockchain to add another layer of security to your encryption. 

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