4in1
by idb & friends
articles
files
wiki
about
invisible college
Files
W.F.F. Archive
Patent and Equipment Records
SIGABA SISDE-28, Method of Commutator Control for M-134-T2, Friedman and Graham, 1933-1941
Converter M-134-T2
Document A522295
155.06 KiB
PDF
Cryptographic Security Provided by Converter M-134-T2
Document A522293
28.54 KiB
PDF
Folder Cover-Method of Commutation Control for M-34-T2
Document A522292
16.25 KiB
PDF
Proposed Scheme-Cipher Wheel Stepping Mechanism
Document A523291
35.82 KiB
PDF
Show more