Composite encryption across cryptographic algorithms

A composite encryption system comprising:

• a first computing system including a processor communicatively coupled to a memory, the memory storing instructions which, when executed by the processor, cause the first computing system to:
• determine a number N of different, independent encryption algorithms used at the first computing system and at a second computing system, wherein N is an integer greater than or equal to two, the N encryption algorithms being associated with N encryption keys received in a certificate;
• generate a different secret associated with an associated encryption algorithm for each of N-1 of the N encryption algorithms, thereby forming N-1 secrets;
• perform an exclusive-or operation on a combination of a content and the N-1 secrets to form encoded content;
• encrypt each of the N-1 secrets with the associated encryption algorithm from among the N-1 encryption algorithms using N-1 encryption keys of the N encryption keys to form encrypted N-1 secrets;
• encrypt the encoded content with the Nth encryption algorithm using the Nth encryption key to form encrypted encoded content;
• and
• transmit, to the second computing system, a composite encrypted key comprising each of the encrypted N-1 secrets and the encrypted encoded content.

A method of securely transmitting content between a first computing system and a second computing system, the method comprising:

• receiving, at a second computing system from a first computing system, a composite encrypted key, the second computing system and the first computing system using a number N of different, independent encryption algorithms using N key pairs, each key pair of the N key pairs including an encryption key and a decryption key, the encryption key of all of the N key pairs being included in a certificate, wherein the composite encrypted key includes N-1 encrypted secrets and encrypted encoded content and N is an integer greater than or equal to two;
• decrypting, at the second computing system, each of the N-1 encrypted secrets with an associated one of N-1 associated encryption algorithms of the N encryption algorithms using N-1 of the N decryption keys to obtain N-1 secrets;
• decrypting, at the second computing system, the encrypted encoded content with a remaining Nth encryption algorithm and Nth decryption key of the N encryption algorithms to obtain encoded content;
• and
• performing, at the second computing system, an exclusive-or operation on the encoded content with each of the N-1 secrets to decode the content.

A system comprising:

• a recipient computing system including a processor communicatively coupled to a memory, the memory storing instructions which, when executed by the processor, cause the recipient computing system to:
• receive, from a remote computing system, a composite encrypted key, the recipient computing system and the remote computing system using a number N of different, independent encryption algorithms using N key pairs, each key pair of the N key pairs including an encryption key and a decryption key, the encryption key of all of the N key pairs being included in a certificate, wherein the composite encrypted key includes N-1 encrypted secrets and encrypted encoded content and N is an integer greater than or equal to two;
• decrypt, at the recipient computing system, each of the N-1 encrypted secrets with an associated one of N-1 associated encryption algorithms of the N encryption algorithms using N-1 of the N decryption keys to obtain N-1 secrets;
• decrypt, at the recipient computing system, the encrypted encoded content with a remaining Nth encryption algorithm and Nth decryption key of the N encryption algorithms to obtain encoded content;
• and
• perform, at the recipient computing system, an exclusive-or operation on the encoded content with each of the N-1 secrets to decode the content.