1. A method of generating an archive comprising at least one block using a device having a processor, a verifier algorithm, and a signing algorithm, the method comprising: executing on the processor instructions configured to: for respective blocks, using the verifier algorithm, calculate a block verifier of the block; generate a block map comprising the block verifiers of respective blocks; using the verifier algorithm, calculate a block map verifier of the block map; using the signing algorithm, generate a signature including the block map verifier; and generate an archive comprising the blocks, the block map, and the signature.