A CDN does not automatically make a website faster: cache misses add overhead, and low-traffic sites may rarely produce hits at the same edge location. This article explains how HTML caching nearly doubled the number of slow pages—and provides a simple formula for calculating the break-even cache-hit rate before deployment.
eMudhra to Exit global SSL/TLS Certificate Business
One mistake cost them an entire line of business.
8 intermediate CA certificates had ridiculously weak private keys.
The private keys were literally:
4, 56, 66, 115, 155, 156, 230, 237
These were NIST P-384 elliptic-curve keys, which should be randomly generated from an enormous range of approximately \(2^{384}\) possibilities.
Instead, all eight keys were integers smaller than 256. Researchers could recover them from public certificates in less than a second
https://emudhra.com/en/press-release/emudhra-to-exit-global-ssl-tls-certificate-business
Linux can tell you that a container is waiting for CPU—but usually not which noisy neighbor caused the delay. This paper introduces SchedBlame, an always-on eBPF tracer that attributes CPU contention to specific cgroups on stock kernels, separates external interference from self-contention and throttling, and reports the culprits with low preliminary overhead.