Patent ID: 8644509
Filing Date: 2014-02-04
Classification: H04L

Abstract:
1. A method to secure transfer of encrypted digital content from a first entity to a second entity, wherein a decryption depends on approval of a third entity, comprising the following steps: Generating a secret key related to a first public key, said first public key being generated according to at least one information of an identity of the second entity, said secret key being stored in a secure memory of the second entity; encrypting a digital content with a second public key, said second public key being generated according to at least one information of an identity of said content, said encrypted content being decrypted with a decryption key, the decryption key being generated according to the second public key; when the third entity grants rights to the second entity to decrypt the encrypted digital content, (i) generating, by a device of the second entity, a public transcription key from the second public key to the first public key so that said public transcription key allows the encrypted content, which is decipherable with the decryption key associated with the second public key, to be converted into an encrypted content which is decipherable with the secret key associated with the first public key and (ii) decrypting the converted encrypted content with the secret key.