We live on a planet where new technology seems to be working against the vast majority of humans living on this planet, rather than helping us to live better. This is sometimes called “singularity”, and Tristan Harris, a former Google ethics guru has now joined a public crusade so that tech companies “stop exploiting our …
In this attack a differential propagates with difficulty for some 20, 40 and up to 64 rounds. We can say that the propagation encounters some “friction”, because the non-linear functions do not always behave as the attacker would like them to behave. Everything looks normal and this is what happens for all block ciphers all …
Continue reading ‘An Anomalous Differential Attack on a Block Cipher’ »
In 2004 I have published a paper [Crypto 2004, Santa Barbara] in which I explain the concept of the so called Bi-Linear attack on DES. The old attack was not extremely strong. It is possible to see that two conditions would be necessary for such an attack to somewhat work well in cryptanalysis of DES: There …
Continue reading ‘A Linear Annihilator Property and Strong Biases with Original DES S-boxes’ »