The SBOM Signature 'Storage Tax': Money Talks 💰📉

Over the last few weeks, I’ve been deep in the weeds of technical best practices for signing SBOMs. I’ve discussed JSF, JCS, property exclusion, and how we move toward data-aware integrity for better interoperability. 🔍

But beyond the technical elegance of a resilient signature, there is a much simpler driver for this work: The Bottom Line. 💳

Currently, most organizations sign SBOMs as binary blobs. This means you are signing the file (the container), not the data (the content). If you change a single space or minify the file for storage, the signature breaks. ❌

This comes with a massive economic cost. 💸

With regulations like the EU Cyber Resilience Act (CRA) mandating that manufacturers store SBOMs for 10+ years, storage is no longer a round-off error in your cloud budget. ☁️💵

The realities of the SBOM binary blob signature storage tax… 👀

💾 Storage Inefficiency

Binary blob signatures prevent you from minifying your data. You are forced to store every space and newline to keep the signature valid.

📈 The 40% Premium

My initial estimates show that signing “pretty-printed” SBOMs results in ~ 40% higher storage costs (or more) compared to data-aware signing.

⏳ 10-Year Compounding

Across thousands of builds and a decade of mandatory retention, that “formatting debt” turns into a significant long-term financial liability.

Technical specifications help with interoperability, but money talks. Data-aware signing isn’t just about better security, it’s about avoiding a decade-long storage tax. 🏦

I brought up this point during my last presentation at the OpenSSF SBOM Everywhere SIG meeting and the shift in the room was noticeable. It’s a powerful reminder that while technical specs drive interoperability, economic impact drives adoption. 🚀

#FinOps #EU #CRA #SBOM #SupplyChainSecurity #CloudCosts #OpenSSF #DevSecOps #CyberResilienceAct