Re-encrypting data on a hash chain

A system, comprising:

• a processor;
• and
• a memory comprising instructions that, when executed by the processor, cause the system to perform a method for managing encrypted data, the method comprising:
• retrieving encrypted data from one or more blocks of a first data structure;
• applying an encryption technique to the encrypted data to generate further encrypted data;
• generating a second data structure, wherein a first block of the second data structure comprises either:
• the further encrypted data;
• or
• information related to the further encrypted data.

A computer-implemented method for managing encrypted data, comprising:

• retrieving encrypted data from one or more blocks of a first blockchain;
• applying an encryption technique to the encrypted data to generate further encrypted data;
• generating a second blockchain, wherein a first block of the second blockchain comprises either:
• the further encrypted data;
• or
• an encryption key for the further encrypted data.