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Side-by-side comparisons of common encryption choices. Each piece is short, opinionated, and tries to answer the question "which should I use" rather than just listing features.

• 6 min read · 2026-01-25

  PGP vs S/MIME — which email encryption protocol should you use?

  PGP and S/MIME both encrypt and sign email, but they trust very different things. Here is when each one is the right answer.

• 4 min read · 2026-02-10

  Argon2id vs PBKDF2 — at-a-glance comparison

  Side-by-side: speed, memory cost, attack resistance, library support, and which one to pick for new code.

• 5 min read · 2026-03-08

  Browser PGP vs GPG on the desktop — when to use which

  GnuPG is the gold standard for serious key management. A browser tool wins for ad-hoc encryption and on devices without root access. Here is the honest comparison.