01 / MODEL
Define the adversary
Turn “encrypt this” into assets, trust boundaries, oracle access, winning events, and failure consequences.
threat modelsA Readude bookEarly Access edition · Available now
Modern Cryptography,
taken seriously.
Move from calling cryptographic APIs to defining adversaries, reading security claims, tracing protocol assumptions, and recognizing where real implementations fail.
33 chapters
one learning arc
one learning arc
Serious ideas. Better reads. ✦ No shelf required. ✦ Read deep. Stay curious. ✦ Serious ideas. Better reads.
33connected chapters
7technical appendices
24tested Python examples
24 weekscomplete study path
Learning outcomes
Understand what the guarantee actually says.
The book joins mathematical definitions to protocol and engineering boundaries instead of treating cryptographic primitives as isolated names.
02 / REASON
Read the claim
Work with indistinguishability, unforgeability, hybrid arguments, reductions, concrete loss, setup assumptions, and composition.
security games03 / AUDIT
Find the boundary failure
Inspect nonce state, framing, canonicalization, replay, domain separation, parser ambiguity, key lifecycle, side channels, and migration.
engineeringCurriculum
From cryptanalysis to post-quantum migration.
Each part supplies prerequisites for the next. Follow the full route or use the accelerated and zero-knowledge-focused paths.
Adversarial thinking
Threat models, security properties, Kryptos as a verification case study, and the classical cryptanalysis workbench.
Mathematical and formal language
Modular arithmetic, groups, fields, probability, entropy, birthday bounds, security games, and reductions.
Symmetric and public-key systems
AES, ChaCha20, AEAD, hashes, MACs, KDFs, RSA, Diffie–Hellman, ECC, and signatures.
Protocols and key governance
HPKE, PKI, TLS 1.3, X3DH, Double Ratchet, HSM/KMS, sharing, and threshold signatures.
Zero knowledge
Commitments, Sigma protocols, R1CS, sumcheck, KZG, IPA, FRI, SNARKs, STARKs, recursion, and zkVMs.
Deployment and transition
Wallet security, incident analysis, cryptographic engineering, agility, and post-quantum migration.
Free sample
Try the first two chapters.
Read the front matter, Preface, study guide, and Chapters 0–1 of the English v1.0.0-rc.4 edition before you buy.
Yours to read and explore
Get the complete Early Access bundle.
Early Access is US$14.99 as a one-time purchase. Applicable taxes and currency conversion are shown at checkout.
Early Access edition
Complete Early Access Bundle
$14.99 USD · one-time purchase
- English PDF, EPUB, and Markdown
- Traditional Chinese companion candidate
- Educational code examples and tests
- Public errata and discretionary support for material corrections
After successful payment, download your files through Dodo Payments. Your delivery email provides access to your purchase.
Purchase includes the files available at the time of purchase. Automatic or lifetime updates are not promised. Simplified Chinese is experimental and excluded from this bundle.
readude noteTransparent publishing
About this Early Access edition
This content-complete edition incorporates corrections from an invite-only Beta. It is an Early Access release candidate, not stable v1.0. AI-assisted tools contributed to drafting, translation, and editing; Kyle Wu is responsible for the published content. The book and companion code are educational, not production guidance. Independent peer review and a cryptographic audit are not claimed.
Paid Early Access v1.0.0-rc.4
FAQ
Before you buy.
How do I receive the book?
After successful payment, Dodo Payments provides access to the purchased digital files and sends a delivery email. The bundle includes English PDF, EPUB, and Markdown, a Traditional Chinese companion candidate, and educational code. If you need help accessing your purchase, contact [email protected].
Does my purchase include future updates?
You receive the files available at the time of purchase. Automatic or lifetime updates are not promised. Material Early Access corrections may be provided at our discretion after verifying an eligible purchase. See the terms and refund policy.
Is this a beginner book?
It rebuilds prerequisites, but it aims beyond introductory API usage. High-school algebra and basic Python are helpful; the complete route is comparable to a demanding university self-study sequence.
Is the code production-ready?
No. Examples are educational. Some intentionally expose failure modes or use toy parameters. Real systems require reviewed libraries, deployment profiles, key management, test vectors, and independent security review.
Was AI used?
Yes. AI-assisted tools contributed to drafting, organization, translation, and editing. Kyle Wu is responsible for the published content. This is not a claim of fully human translation, independent peer review, or cryptographic audit.
What is Readude?
Readude is the independent digital publishing brand founded by Kyle Wu. It publishes serious ideas across technical and non-technical fields. readude.com is the canonical site.
What does Early Access mean?
v1.0.0-rc.4 is a content-complete release candidate incorporating corrections from the completed invite-only Beta. It is available to purchase now, but is not stable v1.0.0. Beta participation and automated checks do not constitute independent peer review, a cryptographic audit, or production-security approval.