Implementation & integration
PDF timestamp creation and verification
The pdf-rfc3161 library adds and verifies document timestamps. An integration checks the document, timestamp response and trust policy; an author's signature is a separate step.
Systems & security engineering
Cryptographic software, Linux internals and embedded security. Practical help with building integrations, tracking down failures, and protecting device boot, keys and updates.
What do you need help with?
Build an integration, investigate a failure, or work through a design. Each area supports hands-on engineering and independent review.
Cryptographic software & integration
Signing, PKCS#11 and HSM integrations, provider testing and key-use workflows.
Linux internals & diagnostic tooling
Investigate library and kernel behavior, build diagnostic tools, and repair low-level integrations.
Embedded security & trusted computing
Design, implement or review secure boot, device identity, key protection and firmware updates.
Selected engineering work
Open-source projects behind the services.
Investigation & tooling
See which cryptographic paths run
OSSLscope and KryProbe investigate OpenSSL provider and Linux kernel behavior. Captures record exercised paths and coverage limits; successful operations need their own checks.
PKCS#11 tools
Observe application workloads, test providers and build remote integrations.
How the work starts
01
Describe the problem
Share what you are building and where you need help. A short outline is enough to start.
02
Agree the work
Set the deliverables, access, checks and fee before starting. Implementation or investigation can be agreed directly.
03
Build and hand over
Receive the agreed changes or findings, with checks and handover notes. Any follow-on work is agreed together.
Working on a device architecture?
The optional Digital Auditor gives a preliminary architecture assessment from your answers, with a free report and PDF.
Work with Device Prophet
Bring the integration, system failure or device security problem you need help with. Start with what you want to build, change or understand.