Patent ID: 11917063
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC G  H

Claim 25:
26. A cryptographic method comprising:
establishing communication with a second cryptographic device;
generating a first private-key;
computing a first public-key from the first private-key;
transferring the first public-key to the second cryptographic device;
receiving a second public-key and encapsulated data from the second cryptographic device;
computing a first raw shared key from the second public-key and the first private-key;
computing the first raw shared key, wherein the first raw key comprises a noisy multiplication between the second public-key and the first private-key;
decapsulating the encapsulated data using at least part of the first raw shared key so as to obtain a key seed; and
applying a validation procedure to the obtained public key to determine if the public key is secure for decapsulation of a key seed, wherein the key seed is not decapsulated or the decapsulated data is not used if the validation procedure was unsuccessful.