Method and system for secure confidential digital content exchange

A system of digital contents exchange configured to exchange digital contents among a plurality of users registered in a sharing association, wherein each user of said sharing association is associated to at least one device provided with one or more processing units and with one or more acquiring devices configured to acquire at least one biometric trait, wherein said at least one device of each user of said sharing association is configured to execute a computer implemented method of exchanging digital contents among a plurality of users registered in a sharing association, wherein said method comprises the following steps:

• A. on said at least one device of each user of said sharing association, associating:
• a personal univocal code of the user under consideration generated on said at least one device of the user under consideration, wherein said personal univocal code of the user under consideration depends on one or more biometric features of identification of the user under consideration deriving from at least one biometric trait of the user under consideration acquired by said one or more acquiring devices, and a public key and a private key of a asymmetric cryptography algorithm corresponding to the user under consideration, wherein the public keys of all the users of said sharing association are accessible by or stored in said at least one device of each user of said sharing association;
• B. on at least one device of a sender user of said sharing association, selecting at least one digital content that forms a transmission payload and further selecting one or more recipient users of said sharing association with whom to share said transmission payload;
• C. on said at least one device of the sender user, encrypting said at least one digital content using as a cryptographic key said personal univocal code of the sender user, obtaining an encrypted payload;
• D. on said at least one device of the sender user, for each one of said one or more recipient users, encoding said personal univocal code of the sender user through said asymmetric cryptography algorithm by means of said public key of the recipient user, obtaining a respective encoded personal univocal code of the sender user;
• E. on said at least one device of the sender user, building an encrypted file comprising the encrypted payload and a matrix binary file, that includes said encoded personal univocal code of the sender user for each one of said one or more recipient users;
• F. sending the encrypted file from said at least one device of the sender user to said at least one device of each one of said one or more recipient users;
• and
• G. on said at least one device of each one of said one or more recipient users receiving the encrypted file,
• a) decoding said encoded personal univocal code of the sender user through said asymmetric cryptography algorithm by means of said private key of the recipient user,
• b) decrypting the encrypted payload using as a cryptographic key said personal univocal code of the sender user, obtaining said at least one digital content.

A set of one or more computer-readable media having stored thereon a set of one or more computer programs comprising instructions that, when executed by one or more processing units of a user's device, cause said user's device to execute a computer implemented method of exchanging digital contents among a plurality of users registered in a sharing association, wherein each user of said sharing association is associated to at least one device provided with one or more processing units and with one or more acquiring devices configured to acquire at least one biometric trait, wherein the computer implemented method comprises the following steps:

• A. on said at least one device of each user of said sharing association, associating:
• a personal univocal code of the user under consideration generated on said at least one device of the user under consideration, wherein said personal univocal code of the user under consideration depends on one or more biometric features of identification of the user under consideration deriving from at least one biometric trait of the user under consideration acquired by said one or more acquiring devices, and a public key and a private key of a asymmetric cryptography algorithm corresponding to the user under consideration, wherein the public keys of all the users of said sharing association are accessible by or stored in said at least one device of each user of said sharing association;
• B. on at least one device of a sender user of said sharing association, selecting at least one digital content that forms a transmission payload and further selecting one or more recipient users of said sharing association with whom to share said transmission payload;
• C. on said at least one device of the sender user, encrypting said at least one digital content using as a cryptographic key said personal univocal code of the sender user, obtaining an encrypted payload;
• D. on said at least one device of the sender user, for each one of said one or more recipient users, encoding said personal univocal code of the sender user through said asymmetric cryptography algorithm by means of said public key of the recipient user, obtaining a respective encoded personal univocal code of the sender user;
• E. on said at least one device of the sender user, building an encrypted file comprising the encrypted payload and a matrix binary file, that includes said encoded personal univocal code of the sender user for each one of said one or more recipient users;
• F. sending the encrypted file from said at least one device of the sender user to said at least one device of each one of said one or more recipient users;
• and
• G. on said at least one device of each one of said one or more recipient users receiving the encrypted file,
• a) decoding said encoded personal univocal code of the sender user through said asymmetric cryptography algorithm by means of said private key of the recipient user,
• b) decrypting the encrypted payload using as a cryptographic key said personal univocal code of the sender user, obtaining said at least one digital content.