-
Upgrading Apache 2.2 OpenSSL security with TLS Interposer
Undoubtedly, you will have heard about the weaknesses of old SSL and TLS protocol versions and ciphers. Web browsers have been updated; but the server administrators are left alone: For stability reasons, many run long-term support editions such as Ubuntu 12.04 LTS. Even without that, most will stick to the reliability of Apache 2.2, hesitant…
-
Network Time Security: NTS articles overview
NTP, the Network Time Protocol, is the way most computers and mobile devices obtain their time through. NTS (Network Time Security) is to NTP what HTTPS is to HTTP. It also is as easy to upgrade as upgrading to HTTPS is these days: No effort for the client, just adding a certificate for the server.…
-
Post Quantum and Homomorphic Encryption made easy
Major challenges in computer and information security are the advent of quantum computers and the need to trust your data to (cloud) service providers. New cryptography is supposed to help, but they look daunting. At their core, however, they are just children’s riddles. An introduction to Lattice cryptography and Learning With Errors.
-
Counting like a computer
Computers are very good at counting. But usually only within narrow limits. Here is an insight into where these limits come from and what goes wrong when they are exceeded.
-
Compact Archives Widget for WordPress
The standard Archives Widget looks like the image right here. It works well when only a few months are to be displayed. However, it fails if your blog’s history goes back a long way. Here is aΓΒ quick way to get down from 12 lines per year to 1, increasing usability and page size.
-
NTS and dynamic IP addresses
Good news is that NTS relies on DNS names, no longer “naked” IP addresses. But what happens when the DNS name changes, pointing to a different IP address? A look at the protocol, the Chrony source, and the implications.
-
Compact Archive for WordPress
The default WordPress Β«ArchiveΒ» block becomes very long and narrow, when months accumulate. Here is an easy way to make it more compact.