Apple applica 3 brevetti progettati per recuperare chiavi private utilizzando una backdoor integrata nel 2010.
Abstarct di uno dei brevetti :
The invention is a cryptographic system using chaotic dynamics. A chaotic system is used to generate a public key and an adjustable
back door from a private key. The public key is distributed and can be used in a public key encryption system. The invention can also
be used for authentication purposes. The adjustable back door of the invention can be used in conjunction with the public key to
derive the private key. The degree of difficulty involved in deriving the private key is dependent on the adjustable back door. That is
the value of the back door can be adjusted to vary the difficulty involved in deriving the private key.
Più specifico, questo brevetto tra l'altro, rivendicazioni (n. 5):
receiving a public key and a back door, the back door including interim conditions in an N-body chaotic system which has initial conditions, the public key being generated from the N-body chaotic system based on the initial conditions and the interim conditions; performing backward iterations on the public key, the backward iteration including applying one or more equations in a motion model to bodies in the N-body chaotic system; and generating a private key based on the public key and the backward iterations.
Hanno un crittosistema reversibile. C'è anche una possibilità non zero di usare questo cryptosystem nei loro prodotti closed-source come FileVault, ma è difficile dire se lo usano veramente.