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WASHINGTON, DC: U.S. Department of Justice, Oct. 4, 2019

Lawless Spaces: Warrant-Proof Encryption and its Impact on Child Exploitation Cases

Sarah Baker/NCMEC

 

WASHINGTON, DC: U.S. Department of Justice, Oct. 4, 2019

Lawless Spaces: Warrant-Proof Encryption and its Impact on Child Exploitation Cases

Sarah Baker/NCMEC

 

Hagelin C36

A later version go the Hagelin, the C38s, was used by the Italian navy to encipher messages about the movement of it’s ships and the German and italian convoys. BP’s Italian Section worked on these messages using a machine called Nightingale which calculated the C38s’s settings.

Alpha is a bloc symmetric encryption algorithm I created during my spare time. I used Java with JavaFX.

My software is not intended to be distributed. Even if I wanted, I can't due to laws :)

 

* The size of the encryption key is variable. It only depends on you when you create the key ;

 

* A file is cyphered by blocs which size is the key size ;

 

* Every variation of the key has repercussions on the whole generated cyphered file.

The key is unique ;

 

* All types of file can be cyphered : txt, images, rar, zip, exe, videos, ... everything you want without risk using a minimal memory ;

Enigma working aid

Codebreakers made working aids from whatever materials were available. Few survive and knowledge about they were used has largely been lost. this example is thought to have helped in the breaking of 3-rotor Enigma machine ciphers,

Index cards

Revealing secret weapons

Among the intelligence discovered from messages and stored on cards was information about the construction and launch of Germany’s secret weapons - the V1 flying bomb and V2 rocket - used against Britain towards the end of the war.

Modified Typex Machine

The Typex was a British encryption machine used by its armed forces. It was more secure and versatile than Enigma. Staff at BP used a different version, adapted to work exactly like Enigma, in the final stage of deciphering enemy messages.

WASHINGTON, DC: U.S. Department of Justice, Oct. 4, 2019

Lawless Spaces: Warrant-Proof Encryption and its Impact on Child Exploitation Cases

Sarah Baker/NCMEC

 

Bottom board filter cap values

 

Reverse-engineering & background: www.eevblog.com/forum/projects/avionics-teardown-reverse-...

BP’s Hit 3 is marked on this diagram showing the chain of commununication for intelligence during the Allied invasion of Normandy in 1944. ‘ANCFX’ was the Allied naval commander, Admiral Bertram Ramsay. ‘CinC’ means Commander in Chief.

In and Around Milton Keyes

Bletchley Park

 

www.bletchleypark.org.uk/

The point of all this, a German Lorenz SZ42 teletype encryption peripheral, aka codename TUNNY/FISH.

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