Silent Signal Techblog is the research arm of Silent Signal, a professional ethical hacking services firm. Rather than product announcements or news roundups, the blog publishes original vulnerability research and reverse-engineering notes drawn from client work and independent study, with a strong emphasis on IBM i and adjacent enterprise platforms.
The core content consists of detailed technical articles. Recent examples include a two-part analysis of the QSYRUPWD password encoding routine, a reconstruction of IBM i save-file checksum mechanisms at the 512-byte payload level, and a write-up of a pre-authentication RCE chain in the IBM Db2 Mirror for i web interface that escalates to QSECOFR. Each post walks through tooling, sample data, and corrected assumptions.
This material is aimed at security researchers, penetration testers, and reverse engineers, particularly those auditing IBM i, Db2, or Java/Liberty application servers. Administrators of legacy IBM i estates may also benefit from the defensive implications, though the writing assumes comfort with hex dumps, disassembly, and protocol internals.
Use the archive by topic rather than chronologically, since posts build on earlier parts. Expect long reads and verify findings against your own samples, as the authors themselves revise earlier conclusions when models prove incomplete. It is a focused, credible research log rather than a tutorial series.
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