Crypto Lab is a 10-part tutorial series on cryptolab — GopherTrunk’s byte-oriented cryptographic-research toolkit for security-testing RF encryption. Its governing idea is blunt: attempting decryption is the test. Point it at captured ciphertext and it attacks by every applicable method, then grades how far each got — RESISTANT, PARTIAL, or BROKEN. We start from first triage and climb to keystream-reuse recovery, the assess battery, and the resumable subject framework.

Authorized testing only. These posts are for security researchers, licensed operators testing their own systems, and CTF/educational use. Intercepting or decrypting communications you are not authorized to access is illegal in most jurisdictions. Crypto Lab is deliberately build-tag-gated (-tags cryptolab) and excluded from the default install.

Every post reads three ways: a TL;DR + cheat-sheet for skimmers, bold headers, tables, and diagrams for the medium read, and full prose for the deep read. Ada (new analyst) and Reese (the veteran) work each attack with you.

This is one leg of the Lab Bench trilogy: Signal Lab, RF Scope, and Crypto Lab (this one). The mystery signal Mercury, captured in Signal Lab and mapped in RF Scope, is finally cracked here.<ol class="post-list series-list"><li class="post-card"> <h2 class="post-card__title">Crypto Lab, Part 1: Breaking It Is the Test</h2> <p class="post-card__meta"> July 2, 2026 Tutorials </p><p class="post-card__desc">Crypto Lab is GopherTrunk’s byte-oriented cryptographic-research toolkit for security-testing RF encryption — shipped inside the binary but excluded from the default install behind a build tag, it attempts decryption by every applicable method and grades how far each one got.</p></li></ol><p class="blog-feed-link"> See all tutorials or subscribe via RSS. </p>