Category Archives: security

amd_iommu=off or amd_iommu=fullflush

Hundreds of years ago the poet William Shakespeare wrote: To be, or not to be? Today, users of some HP Notebook laptops with AMD CPU (like HP Notebook 15-ba006nm) wanting to have Linux often have different dilemma: amd_iommu=off or amd_iommu=fullflush … Continue reading

Posted in Linux, security, hardware | Tagged , , | 1 Comment

Security holes in Intel CPUs

SHORT: This is my collection of links to articles about Intel CPU/chipset security holes. For some longer time I’m interested in security holes/flaws in PC hardware as I find such things a real nightmare from software developer point of view. … Continue reading

Posted in BIOS, hardware, security | 2 Comments

RSA signatures in Java with Bouncy Castle

This is a complete guide, starting from RSA key pair generation into PEM files, through loading private/public keys from files into proper Bouncy Castle objects, to digital signature creation and verification – all using Bouncy Castle. No JCA. How to … Continue reading

Posted in Java, security | Tagged , | Leave a comment