Substitution cipher

Assess

Techniques

An encryption method that replaces symbols with other symbols based on a defined mapping.

Why it's here

Placed in Assess: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 1 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.

Evidence (1)

6Hacker News·9/19/2026research
GPT-6 Astra Decodes a World War I German Cipher
A Hacker News post reports that GPT-6 Astra solved an unsolved World War I German radio message encoded with the ADFGVX cipher. The decoded text appears to match historical logs about an English cruiser arriving at Sevastopol and an Allied squadron following on November 26, 1918.