Destroying device of nonvolatile storage

Abstract

The invention discloses a destroying device of a nonvolatile storage. The destroying device is characterized in that when a destroying main-control unit receives a destroying instruction, switching on at least one channel switch in sequence, controlling a power-supplying isolating unit to isolate normal working voltage, recording an initial value of destroying current, and when the output voltage is not high destroying voltage, controlling a voltage increasing unit to increase preset voltage provided by a low-voltage power supplying unit; controlling the power-supplying isolating unit to input the preset voltage after the voltage is increased into the channel switch switched on in sequence or when the output voltage is high destroying voltage, controlling the power-supplying isolating unit to input the high destroying voltage into the channel switch switched on in sequence; and when each channel switch is switched on, monitoring the destroying current, and if the destroying current is increased from the initial value to a preset threshold value or is decreased from the initial value to zero, judging that the destroying of a corresponding nonvolatile storage medium connected with the switched-on channel switch is successful. The destroying device disclosed by the invention has the advantages that the destroying power consumption can be controlled in a self-adaptive manner to destroy different types of storage media reliably and safely.

Description

technical field [0001] The invention relates to the field of data information security, in particular to a device for destroying non-volatile memory. Background technique [0002] Non-volatile memory (Non-volatile memory) is mainly composed of NOR Flash, NAND Flash, MRAM (Magnetic Random Access Memory), ferroelectric memory (FRAM or FeRAM, Ferroelectric Random Access Memory) or phase-change memory (PCM, Phase-change memory; or PCRAM, PRAM, Phase-change Random Access memory), etc. After these non-volatile storage media are powered off, data will not be lost, that is, they all have data non-volatility. [0003] The security of sensitive data stored in non-volatile memory is getting more and more attention. Especially in the government, military, scientific research institutions and enterprises, once the confidential data is leaked, the loss will be huge, so the data destruction technology emerges as the times require. Data destruction technologies are mainly divided into so...

AI Technical Summary

Problems solved by technology

However, the inventors of the present invention have discovered through long-term research and development: 1. Due to the different manufacturing processes and models of different non-volatile storage media, some of them show an open circuit state when they break down, and some show a short circuit state when they break down, or even The same type of non-volatile storage media of the same batch will also have the above situation with probability, and the versatility and reliability of the existing hard destruction technology are poor; 1.8V, 2.5V and 3.3V, the existing hard destruction technology cannot adapt to the destruction voltage and the timing of the high voltage disconnection when destroying the non-volatile storage medium, so that the power consumption of the destruction cannot be controlled, and the power supply capacity of the power supply system cannot be controlled. High requirements and poor practicability; 3. Some non-volatile memories include multiple non-volatile storage media. When the existing hard destruction technology destroys multiple non-volatile storage media at the same time, the first to destroy Non-volatile storage media will bypass the destruction current, causing other non-volatile storage media to not be completely burned; 4. Some non-volatile memories are connected to their controllers. If the existing hard destruction technology accidentally burns the controller , then the controller will bypass the large current, causing the non-volatile storage medium to be destroyed; 5. In different applications, the existing hard destruction technology has security problems, including false triggering and high-voltage isolation. If the high-voltage isolation from the external system (such as the power network) cannot be carried out during or after the destruction, it will affect the normal operation of other systems, and if the data does not need to be destroyed, important data is destroyed or damaged by mistake due to false triggering other systems, will cause huge losses

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