BoredomBusted — Find Your Next Favorite Thing To Do
Discover hobbies, activities, places, and ideas that spark joy. Whether you're looking for something creative, active, social, or relaxing, BoredomBusted helps you find your next favorite thing to do.
Browse our hobby guides, things-to-do collections, and place ideas to never be bored again.
Cryptography isn't just for hackers or techies — it's a captivating blend of history, logic, and the thrill of cracking puzzles, making it accessible to all.
Learning cryptography as a beginner involves understanding how to transform information into unreadable code, ensuring its security throughout the process.
Mathematical algorithms scramble data, allowing only those with the correct key to read it clearly.
It's not just solving problems—you're exploring the intersection of math, history, and real-world security.
In cryptography, you will create and decipher codes, study historical methods of encryption, and engage in solving puzzles that require logical reasoning and pattern recognition. This involves using various tools and software to implement ciphers, analyze data, and perhaps even develop your unique coding systems.
Cryptography challenges your cognitive abilities, fostering a flow state through focused problem-solving and deep engagement with complex systems. As you progress in understanding and applying techniques, you experience incremental skill feedback, enhancing your sense of accomplishment and mastery.
You probably think cryptography is purely a hacker skill or demands a computer science degree.
That assumption keeps many from ever trying it, while those who do get hooked.
Cryptography isn't about breaking systems. Think of it as understanding how trust gets woven into information. The concepts stretch back thousands of years.
The math varies from familiar to challenging, with fascinating problems often near the surface.
It intertwines with history, linguistics, logic, and philosophy, offering a unique perspective on secrecy.
Julius Caesar used a simple letter shift to disguise military messages.
It seems trivial today, but figuring out why such a cipher fails is the real start of understanding.
Patterns change, but cryptographic principles remain.
The moment you solve a cipher, you're hooked – and that moment is within reach.
Breaking a cipher can seem effortless when you watch someone do it. Patterns appear, letters fall into place, and it feels like magic unfolding in real-time.
But "magic" takes more than an afternoon to master.
In the beginning, everything looks like gibberish. Symbols mean nothing. Frequency tables blur together. The alphabet feels unfamiliar. A simple Caesar cipher might take you 40 minutes.
Then something changes. Patterns start to form, and spotting E and T becomes second nature. Substitution grids fill quicker, and you pause less before finding solutions.
The struggle is feeling like you're missing something critical. English letter frequency order is key: E, T, A, O, I, N. Memorize it, live it — not just glance at a chart.
It's not missing DNA. Your brain just needs time to build its own lookup table, gaining another row each session.
When to start: Early morning
Duration: 1 hour
Cost to try: $0
Success criteria: If you can encode one message with a Caesar or Vigenère cipher and decode it back to the exact original text, do session 2.
It's easy to overlook simple ciphers like Caesar and Vigenère. Many jump straight into complex systems like AES or RSA before understanding the fundamentals of encryption.
Start with cryptanalysis. Spend your first two weeks breaking classical ciphers using frequency analysis. This gives you the intuition needed before building anything.
Conceptual engagement is appealing, but neglecting number theory leaves many lost. Mathematical foundations don't just 'click' later on.
Learn modular arithmetic first. Diving into modular exponentiation before any public-key system demystifies concepts like RSA.
Seeing Base64 output often misleads beginners into thinking it's secure. The unreadable strings can result in confusing encoding with encryption.
Encoding is not security. Always remember: encoding changes formats, encryption protects secrets. Test this by decoding a Base64 string with CyberChef to see its vulnerability.
Creating your own cipher feels like progress. Yet it teaches nothing about real-world system vulnerabilities.
Focus on attacking broken implementations. Use CTF platforms like PicoCTF or CryptoPals. One successful attack reveals more than creating multiple homemade ciphers.
Algorithms catch all the attention, leading novices to focus on cipher choice. They often ignore how keys are actually handled, which is crucial for security.
Plan your key management first. Establish how keys are stored, rotated, and destroyed before writing any encryption code. Real-world failures often stem from key mishandling.
Cryptography doesn't require a special room. Just grab a screen, a notebook, or find a quiet library spot where you can focus.
Some enjoy working on challenges at makerspace tables with other technical enthusiasts. It's a great option if you prefer some company.
For a national perspective, keep an eye on the events listed by the Cryptography Research group at IACR. Their calendar includes conferences worldwide.
Introduce yourself as a beginner who has completed some CTF challenges. This helps show teams you're serious enough to take on junior solve roles immediately.
This is pencil-and-paper ciphers – Caesar shifts, Vigenère, Playfair – the kind humans solved before computers existed. It's slower and more tactile. The best place to start because the math is visible and intuitive.
This is the academic deep end – RSA, elliptic curves, public-key infrastructure. You're diving into the mathematics behind internet security. Ideal for those seeking mathematical challenges beyond basic ciphers.
CTFs are puzzle competitions where cryptography is one of several challenge categories. This is where hobbyists actually play – timed, competitive, and free to enter through platforms like PicoCTF or CryptoHack. Great for people who thrive on structured challenges.
Instead of building ciphers, you're breaking them – finding weaknesses, running frequency analysis, cracking keys. It flips the mindset entirely. Perfect for those who enjoy practical problem-solving over theoretical work.
Enigma replicas, cipher disks, mechanical one-time pads – cryptography you can hold. Gear costs jump here, with quality Enigma replicas running $100–$400. Perfect for those who appreciate a hands-on connection to history.
History Study lives in the same world — different mechanics, similar appeal.
Readers who enjoy this often gravitate toward Puzzle Boxes next.
Research Reading lives in the same world — different mechanics, similar appeal.
Mathematical intuition for modular arithmetic changes everything in cryptography. Beginners often memorize algorithms like RSA and AES without grasping their underlying principles. That's like collecting tools without knowing what they're for.
The real turning point is understanding remainders, cycles, and equivalence classes without a calculator. Every major cipher depends on this foundation. Once you feel why
7 × 3 ≡ 1 (mod 20) matters – not just confirm it – the whole field snaps into focus.
Without intuition, cryptography feels like magic tricks you memorize and forget. But with it, difficult concepts reveal their structure. The mystery of why discrete logarithms are hard clears up. The logic behind RSA's key generation becomes visible. You see how wrapping around a number space makes breaking ciphers computationally expensive.
Each piece that felt random now fits a pattern. The next section breaks down practical steps to develop this core intuition.
Over 30 days, dedicate yourself to 8 cryptography sessions. Two sessions per week, each lasting about an hour.
Cryptography has a frustration curve that peaks around session 4 or 5. If you keep going, session 8 will reveal whether this hobby is for you.
The cryptography bug bites hard when you catch yourself pondering cipher problems out of nowhere. That's not just liking puzzles; that's the hobby consuming you. Dive into real historical ciphers or entry-level CTF challenges. You're already itching to.
A neutral reaction means the math might be too dry or the problems didn't feel worth your brainpower. Give a CTF challenge a shot before quitting. It could just be that you haven't connected with the right puzzle yet.
If you felt a visceral dislike, skipping sessions more often than attending them, that's clarity. Cryptography demands a ravenous curiosity about mechanisms, not a feeling of homework. If that drive is missing, forcing more time won't fix it.
The undeniable sign is when a news article triggers curiosity about the mechanics behind a breach or code. If you're itching to know 'how did they do that?' rather than just acknowledging the outcome, you're in the right place. That itch predates any formal learning.
For quicker fixes, see our roundup of things to do when you're bored.
No, you can start cryptography as a hobby without advanced math skills. Begin with basic concepts like substitution ciphers and simple encryption methods, then gradually move toward more mathematical topics like modular arithmetic and number theory. Many online resources teach cryptography from the ground up for beginners.
You can grasp fundamental concepts like symmetric and asymmetric encryption in 4–8 weeks with consistent weekly study. Becoming proficient enough to understand real-world applications and implement secure systems takes 3–6 months of dedicated practice. Mastering advanced topics like elliptic curve cryptography requires longer-term commitment.
You only need a computer and free resources like online courses, books, or platforms like Cryptohack and Coursera. Optional tools include Python (for coding cryptographic algorithms), OpenSSL (for testing encryption), and a text editor. Most hobbyists start with free educational resources before investing in specialized software.
No—cryptography focuses on securing and protecting information, while hacking involves unauthorized access to systems. Cryptography is a defensive, ethical field used to safeguard data; understanding it helps you build secure systems and protect privacy. Ethical hackers use cryptography knowledge to find vulnerabilities, but cryptography itself is about protection, not breaking in.
You can create cipher puzzles, participate in cryptanalysis challenges, contribute to open-source security projects, or build encryption tools. Many hobbyists solve real-world CTF (Capture The Flag) competitions, explore steganography, or research historical encryption methods. You can also apply cryptography skills to protect your own digital privacy and communications.
Cryptography is one of the cheapest hobbies to start—most foundational learning is completely free through online courses, tutorials, and open-source tools. If you want paid resources, college-level courses or specialized certifications range from $50–$500, but they're optional. Beyond that, you only pay for what you choose: books, advanced courses, or conference attendance.