Patent ID: 8880904

Claim:
A system for making data secure, comprising: a monotonic counter configured to store an encrypted current value of the monotonic counter (v c ); a hardware processor; a physical data medium comprising: at least one data block written on the physical data medium, a first master block comprising a value equal to the value of the monotonic counter plus 1 (v c+1 ), an identifier of a last data block of the at least one data block written on said physical data medium, a first authentication code guaranteeing an authenticity of the at least one data block written on the physical data medium, a second authentication code calculated from the last data block written on the physical data medium, said last data block written on the physical data medium being fixed at a pre-specified value, and a third authentication code guaranteeing the authenticity of the first master block, and a second master block forming a replica of the first master block, wherein the at least one data block, the first master block and the second master block are contiguous to one another on the physical data medium; and an authentication key.