Lawrence
@superposed.bsky.social
Software engineer, ex F1 twiddler, indiepop fan, owns a 356. Not sure where home is, hence the handle.
You can go to http://bluesky.ljw.me.uk to verify this identity.
/I can provide evidence for anything but proof for nothing./
You can go to http://bluesky.ljw.me.uk to verify this identity.
/I can provide evidence for anything but proof for nothing./
One clarification to RobsLondon @22:12 - the Lorenz decryption was a two-part affair - John Tiltman derived the binary keystream from the two messages and Bill Tutte (seen @8:09) deduced the design of the machine from this. Unlike Enigma, the Lorenz cypher was broken without ever seeing a machine.
September 19, 2025 at 6:38 PM
One clarification to RobsLondon @22:12 - the Lorenz decryption was a two-part affair - John Tiltman derived the binary keystream from the two messages and Bill Tutte (seen @8:09) deduced the design of the machine from this. Unlike Enigma, the Lorenz cypher was broken without ever seeing a machine.
"There's nothing so simple that works so well that it can't be made to work better by making it more complicated."
I'm not sure where that came from, but I think it was actually about the Diesel engine 😁
I'm not sure where that came from, but I think it was actually about the Diesel engine 😁
May 27, 2025 at 4:06 PM
"There's nothing so simple that works so well that it can't be made to work better by making it more complicated."
I'm not sure where that came from, but I think it was actually about the Diesel engine 😁
I'm not sure where that came from, but I think it was actually about the Diesel engine 😁
A PDP-8e on FPGA, analogous to my 360 project.
See activelow.net/post/pdp8e-r...
See activelow.net/post/pdp8e-r...
January 21, 2025 at 12:49 PM
A PDP-8e on FPGA, analogous to my 360 project.
See activelow.net/post/pdp8e-r...
See activelow.net/post/pdp8e-r...
The exhibitor's grandfather (I am sorry I do not know their names) was involved with the original development but everything was destroyed. So the items on display are an attempt to recreate the system. It was never adopted and I do not know how far it was developed.
January 21, 2025 at 12:47 PM
The exhibitor's grandfather (I am sorry I do not know their names) was involved with the original development but everything was destroyed. So the items on display are an attempt to recreate the system. It was never adopted and I do not know how far it was developed.
The encryption had 3 steps - letter substitution (like the Engima plugboard), binary XOR encryption, and output bit shuffling. I think this would have removed some of the non-randomness that the Lorenz system exhibited (which Colossus exploited) but maybe introduced more avenues of attack.
January 21, 2025 at 12:46 PM
The encryption had 3 steps - letter substitution (like the Engima plugboard), binary XOR encryption, and output bit shuffling. I think this would have removed some of the non-randomness that the Lorenz system exhibited (which Colossus exploited) but maybe introduced more avenues of attack.
An interesting display of an 1941 ETH-developed encryption system designed to be superior to Enigma, and somewhat similar to the Lorenz system in that it used 5-bit binary encoding.
January 21, 2025 at 12:45 PM
An interesting display of an 1941 ETH-developed encryption system designed to be superior to Enigma, and somewhat similar to the Lorenz system in that it used 5-bit binary encoding.