01 / MODEL
Define the adversary
Turn “encrypt this” into assets, trust boundaries, oracle access, winning events, and failure consequences.
threat modelsA Readude bookPaid Early Access · live
Modern Cryptography,
taken seriously.
Move from calling cryptographic APIs to defining adversaries, reading security claims, tracing protocol assumptions, and recognizing where real implementations fail.
Paid Early Access v1.0.0-rc.4 — available now through secure Dodo checkout.
33 chapters
one learning arc
one learning arc
Free public sample
Read Chapters 0–1 before Early Access.
The English v1.0.0-rc.4 sample includes the front matter, Preface, study guide, Chapter 0, and Chapter 1. It is public-safe evaluation content—not the full book or paid companion bundle.
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.
readude noteTransparent Early Access
A release candidate—not an invented badge of authority.
The manuscript was developed and translated with AI-assisted tools. The author is responsible for selection, organization, verification, editing, and release. Automated structure tests and passing educational examples do not constitute peer review, a cryptographic audit, or production approval.
Status: PAID EARLY ACCESS · SALES OPEN
Paid Early Access
One product. One clear price.
The founding price is US$9.99 through September 8, 2026 at 20:26 Asia/Taipei. The same product then moves to US$14.99.
Founding Early Access
Complete Early Access Bundle
$9.99 then $14.99
- English PDF, EPUB, and Markdown
- Traditional Chinese companion candidate
- Educational code examples and tests
- Public errata and discretionary support for material corrections
Simplified Chinese is experimental and excluded from the initial paid bundle. The invite-only Beta, reader/device disposition, provider verification, and controlled payment/delivery check are complete. No Live refund or Revoke was executed. Payout reconciliation follows the first eligible post-launch payout.
FAQ
What this release is—and is not.
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, and English translation. Human editing, primary-source checks, and beta issue triage are tracked. Claims of fully human translation, peer review, or audit are prohibited.
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 with zero known Critical or High content blockers after the invite-only Beta and reader/device checks. It is not stable v1.0.0, independent peer review, a cryptographic audit, or production-security approval. Purchase includes the files available at the time of purchase; automatic or lifetime updates are not promised.