Methods and systems for tamper resistant files

A system having a tamper-resistant file system, said system comprising:

• a virtual block device configured to receive data, digitally sign blocks of the data based on a private key, and discard the private key;
• a block device configured to receive the digitally signed blocks of data, and write the digitally signed blocks of data to a storage device;
• and
• a file system implemented on top of the block device

A method of verifying integrity of data stored in a computer system, wherein the data has been digitally signed by a discarded private key, said method comprising:

• receiving a request for data stored in the computer system;
• determining a public key that is related to the discarded private key;
• decrypting the digital signature based on the public key;
• and
• verifying the data based on the decrypted digital signature.