Practical Countermeasure against Attacks Exploiting Detection Efficiency Mismatch in Quantum Key Distribution

We demonstrate a practical countermeasure against a well-known class of attacks on quantum key distribution QKD systems that exploit detection efficiency mismatch, where the receiver's detectors do not exhibit identical responses to incoming photons across all degrees of freedom. This class of...

Rethinking Side-Channel Analysis: Automated Discovery and Analysis of Side-Channel Leakage with LLM-Assisted Agents

Side-channel attacks exploit unintended information leakage from system behavior and continue to pose serious privacy risks in modern platforms. Despite extensive prior work, side-channel analysis remains largely manual and fragmented, typically assuming predefined target events and a fixed set o...

Backup Warning: "repository time shift detected, immutability flag cannot be set."

Challenge A Backup or Backup Copy job using an Immutable Hardened Linux Repository displays the warning: A problem occurred during setting the immutable flag: repository time shift detected, immutability flag cannot be set. Please refer to KB4482 for more details Cause This warning is displayed...

Intermittent SAP HANA Log Backup Monitoring Failures

This article documents an error that may occur during an SAP HANA Log Backup. Challenge SAP HANA log backup monitoring fails to detect log backups during monitoring intervals. The following warning message precedes the RPO violation error in the action log for the log backup monitoring job: Curre...

DEBIAN-CVE-2016-1548

An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer-dst timestamp recorded for that server. After making this switch, the client in NTP 4.2.8p4 and earlier and NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c will reject all future legitimat...