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Supply Chain Security

How Semiconductors Are Made: From Sand to Chip, Step by Step

Quartz becomes silicon, then ultra pure polysilicon, a crystal ingot and wafers, then hundreds of patterning steps, testing and packaging into a chip.

Oct 23, 202644 min read
Supply Chain Security

BOM-Link Explained: Link an SBOM, VEX, CBOM and AIBOM for One Release

BOM-Link is a CycloneDX URN that points at another BOM, or one element in it, by serial number and version. Here is how to link one release's BOM set.

Oct 23, 202633 min read
Supply Chain Security

CycloneDX Versions 1.0 to 1.7 Explained, Plus the ECMA-424 Editions

CycloneDX grew from an XML parts list in 2018 to 1.7 in 2025. What each version added, how ECMA-424 maps to 1.6 and 1.7, and which version to emit.

Oct 23, 202636 min read
Supply Chain Security

CycloneDX Attestations (CDXA) vs in-toto, SLSA and Sigstore Bundles

CDXA records claims and evidence against a standard; in-toto and SLSA describe how an artifact was built; a Sigstore bundle proves who signed it.

Oct 23, 202640 min read
Supply Chain Security

VDR and BOV Explained: Disclosure Reports and Bills of Vulnerabilities

A VDR lists every vulnerability affecting a product with its impact analysis. A BOV shares vulnerability data alone. Fields, JSON examples and when to ask.

Oct 23, 202639 min read
Supply Chain Security

VEX in SPDX 3.0 Security Profile vs CSAF, OpenVEX and CycloneDX

SPDX 3.0 writes VEX as four typed relationships from a vulnerability to products. How that compares with CSAF 2.0, OpenVEX and CycloneDX, field by field.

Oct 23, 202640 min read
Supply Chain Security

What Is a KBOM? A Kubernetes Bill of Materials, Built with CycloneDX

A KBOM is a Kubernetes bill of materials: control plane, nodes, add-ons, CRDs, Helm releases and images by digest. Here is how to build one in CycloneDX.

Oct 23, 202638 min read
Supply Chain Security

How to Generate an AIBOM with OWASP AIBOM Generator and cdxgen

Use the OWASP AIBOM Generator for Hugging Face models and cdxgen for repositories, then fill the human fields, validate, sign and store the AIBOM in CI.

Oct 23, 202637 min read
Supply Chain Security

The Riemann Hypothesis Explained: Primes, Zeta and Cryptography

The Riemann hypothesis says every non-trivial zeta zero has real part 1/2. It is unproved, and a proof would not break RSA or elliptic curve crypto.

Oct 23, 202645 min read

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