Career profile · live from the Careermash careers engine
Careermash
Digital / data / automationDigital / data / automation
Cryptographer
Cryptographers create secret codes and mathematical systems to keep sensitive information safe. Banks, governments, hospitals and tech companies all rely on cryptographers to protect their data from hackers.
No degree needed for many routes
AI impact: low££££ payDirect entry route
22
AI impact
how much AI is reshaping it
Robin · your guide
Curious about being a cryptographer? Here's the honest picture - what you'd really do, what you'd earn, and every way in. No need to decide anything yet.
What you'd actually do
As a cryptographer, you build the secure systems that protect secrets - whether that's a bank's money, a hospital's patient records, or a country's defence information. You use maths, especially number theory and logic puzzles, to design codes that are so strong that no amount of guessing can break them. You also hunt for weaknesses in existing codes, testing them to make sure they actually work.
Your day involves designing and testing encryption systems, writing code to put them into software, and staying up to date with new threats so you can keep ahead of hackers. You'll work closely with software engineers to make sure the systems you create are practical and don't slow down the apps people use. You'll also research new cryptographic ideas and keep learning - this field moves fast because hackers are always coming up with new tricks, and your job is to think several steps ahead.
1Develop and implement encryption algorithms to protect sensitive data.
2Analyze cryptographic systems for vulnerabilities and recommend improvements.
3Collaborate with software developers to integrate security measures into applications.
4Conduct research on emerging cryptographic technologies and techniques.
5Perform rigorous testing and validation of cryptographic protocols.
6Prepare detailed reports on cryptographic findings and present to stakeholders.
7Stay updated on regulatory requirements and industry standards in data protection.
8Participate in cybersecurity incident response teams to mitigate threats.
Career progression & pay
01
Getting in
Junior Cryptographer
£30,000 - £40,000
BSc in Mathematics, Computer Science, or related field
As a Junior Cryptographer, you will assist in developing encryption protocols and conducting basic security assessments. This role is ideal for recent graduates looking to gain hands-on experience in the field.
02
Building up
Mid-level Cryptographer
£50,000 - £70,000
3-5 years experience in cryptography or cybersecurity
In a Mid-level role, you will take on more complex projects, lead small teams, and contribute to the development of advanced cryptographic solutions. You will also mentor junior staff and collaborate with other departments.
03
At the top
Senior Cryptographer/Head of Cryptography
£80,000+
10+ years experience, chartered status with BCS or equivalent
At the peak of your career, you will lead cryptographic initiatives, set strategic direction for security policies, and represent your organisation in industry forums. You will be responsible for overseeing all cryptographic activities and ensuring compliance with national standards.
Degrees that lead here via Computer Science
2D Animation and Stop Motion
Teesside University
2D Animation and Stop Motion
Teesside University
2D Animation and Stop Motion (with Foundation Year)
Teesside University
3D Animation
Ravensbourne University London
3D Animation and Visualisation
Glasgow Caledonian University
3D Animation for Games and Film
Middlesex University
Apprenticeships that lead here
No apprenticeship standard maps directly yet - the university or college route is the main way in.
Who hires - top UK employers
GCHQ
As one of the UK's intelligence agencies, GCHQ offers a unique opportunity to work on national security and cutting-edge cryptographic technologies.
BAE Systems
A global defence, aerospace, and security company, BAE Systems is known for its innovative approach to cybersecurity and cryptography.
Thales Group
Thales is a leader in digital security and offers exciting opportunities in cryptography across various sectors, including aerospace and defence.
IBM UK
IBM is at the forefront of technology and cybersecurity, providing cryptographers with the chance to work on groundbreaking projects.
Cyber Security Agency
This agency focuses on protecting the UK from cyber threats and offers roles that are pivotal in developing cryptographic solutions.
AI & the future of this job
Cryptography sits in a fascinating position relative to AI disruption: it is simultaneously one of the fields that powers AI security infrastructure and one that AI genuinely struggles to replace. Designing cryptographic primitives, identifying subtle algorithmic weaknesses, and reasoning about adversarial mathematical systems requires deep, specialised human expertise that LLMs cannot reliably replicate. AI tools can assist with literature reviews and code implementation, but the core intellectual work of cryptographic design and analysis remains firmly human-led. If anything, the rise of AI systems handling sensitive data is expanding demand for cryptographers rather than threatening it.
Within 5 Years
Demand accelerating sharply
The NIST post-quantum cryptography standards finalised in 2024 are triggering a massive, industry-wide migration project that will dominate the next five years of cryptographic work. AI tools will take over boilerplate security coding and vulnerability scanning at a junior level, but expert cryptographers directing that work will be more valuable, not less. Expect strong graduate hiring from defence, banking, and cloud infrastructure sectors. Salaries for qualified practitioners are already rising above general software engineering rates.
Within 10 Years
Core role secure, scope broadens
By the mid-2030s, quantum-resistant infrastructure will be partially deployed but far from complete, keeping experienced cryptographers in high demand for validation, auditing, and incident response. AI systems will handle more of the routine protocol testing and implementation checking, freeing cryptographers to focus on higher-order threat modelling and novel algorithm research. Homomorphic encryption and zero-knowledge proof applications are likely to open new commercial markets, particularly in privacy-preserving AI itself. The field will be more specialised, better paid, and no smaller in headcount.
Within 20 Years
Foundational, possibly elevated
If quantum computing reaches practical attack capability within this window, cryptography becomes one of the most critical engineering disciplines on the planet overnight. Even in scenarios where quantum timelines slip, the proliferation of AI systems, autonomous infrastructure, and digital identity frameworks ensures cryptographers remain essential architects of trust. Advanced AI may assist in formal verification of cryptographic proofs, genuinely accelerating research productivity. This is a career where the long-term trajectory points upward rather than toward obsolescence.
How to stay ahead
Specialise in post-quantum cryptography early
The transition to lattice-based, hash-based, and code-based cryptographic schemes is the defining challenge of the next decade. Getting deep knowledge of NIST PQC standards and the mathematical foundations behind them now puts you ahead of most working practitioners. University modules or self-directed study in algebraic lattices and number theory will pay dividends disproportionate to the effort.
Learn to work alongside AI security tooling
Tools like AI-assisted fuzzing, automated vulnerability scanning, and LLM-based code review are becoming standard in security workflows. Understanding where these tools fail, and they do fail in cryptographic contexts, is itself a specialist skill. Cryptographers who can evaluate, configure, and critically interpret AI security outputs will be far more effective than those who either ignore or uncritically trust them.
Build applied implementation experience
Pure mathematical cryptography without engineering context limits your employability in industry roles. Contributing to open-source cryptographic libraries, working with TLS or secure enclave implementations, or completing security engineering internships gives you the applied credibility that academic training alone does not. Employers in fintech and cloud security specifically want practitioners who understand deployment realities.
Pursue formal clearance-eligible career pathways
A significant portion of the most interesting and best-compensated cryptography work sits inside or adjacent to the UK intelligence and defence community, including GCHQ, NCSC, and cleared contractors like BAE Systems Applied Intelligence and Thales. Maintaining a clean background and pursuing NCSC-certified degree programmes or apprenticeships opens doors that are simply unavailable to most technology graduates. The combination of clearance and cryptographic expertise is genuinely rare.
How to get in - your routes
Careermash · your kind of work, the careers in it, and every route in - all in one place.