Data protection with two password asymmetric encryption

A computing device comprising:

• one or more processors;
• and memory storing instructions that, when executed by the one or more processors, cause the computing device to:
• receive, from a second computing device, a first time-constraint token;
• receive a current system time and a predetermined shared secret associated with the computing device and the second computing device, wherein the current system time is determined using an epoch converter;
• derive, using a first key derivation function and based on the current system time and the predetermined shared secret, a first cryptographic key;
• decrypt, using the first cryptographic key, the first time-constraint token to recover a public key;
• derive, based on a first password, a private key;
• derive, based on the private key and the public key, a second cryptographic key;
• and
• encrypt, based on the second cryptographic key, data to generate encrypted data.

One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors, cause the one or more processors to perform steps comprising:

• receive, at a first computing device and from a second computing device, a first time-constraint token;
• receive, at the first computing device, a current system time and a predetermined shared secret associated with the first computing device and the second computing device, wherein the current system time is determined using an epoch converter;
• derive, using a first key derivation function and based on the current system time and the predetermined shared secret, a first cryptographic key;
• decrypt, by the first computing device and using the first cryptographic key, the first time-constraint token to recover a public key;
• derive, by the first computing device and based on a first password, a private key;
• derive, by the first computing device and based on the private key and the public key, a second cryptographic key;
• and
• encrypt, by the first computing device and based on the second cryptographic key, data to generate encrypted data.