CN208938244U - A kind of water power gas meter - Google Patents

Abstract

The utility model discloses a kind of water power gas meters, belong to measurement instrument technical field.It includes CPU card and ESAM card, and CPU card and ESAM card interact, and is provided with central processing unit, Electrically Erasable Programmable Read-Only Memory and random access memory in the CPU card.A kind of water power gas meter of the utility model has high security, flexibility and supports and the excellent performances such as application extension.

Description

A kind of water power gas meter

Technical field

The utility model relates to a kind of water power gas meters, belong to measurement instrument technical field.

Background technique

The metering that water power gas meter is widely used in the place such as family is used, but conventional intelligent water, electricity and gas table is used and commonly patrolled Encrypted card is collected, but its safety, flexibility and the performances such as support and application extension are poor.

Utility model content

In view of this, the present invention provides a kind of water power gas meters, have high security, flexibility and support and answer With excellent performances such as extensions.

The utility model solves above-mentioned technical problem by following technological means:

A kind of water power gas meter of the utility model comprising CPU card and ESAM card, CPU card and the interaction of ESAM card, it is described Central processing unit, Electrically Erasable Programmable Read-Only Memory and random access memory are provided in CPU card.

COS operating system is provided in the random access memory.

Cryptographic calculation coprocessor is provided in the central processing unit.

The ESAM card built-in security processor carries out the cryptographic calculation of DES, 3DES, with joined during at luck Random number supports multi-stage key management system.

The water power gas meter of the utility model uses the higher CPU card of safety, compared to more traditional General Logic encrypted card, Contain randomizer in it, hardware DES, 3DES encryption algorithm, and compounding practice system (OS on cpu chip, also referred to as COS), security level has reached financial rank.

The electrical water meter of CPU card is compared with the electrical water meter of logic encryption card:

In technical aspect (logic encryption card and CPU card):

Logic encryption card is called storage card, and the integrated circuit in card has encryption logic and EEPROM, and (electric erasable can be compiled Journey read-only memory).

CPU card is called smart card, and the integrated circuit in card includes central processing unit (CPU), electric erazable programmable is read-only deposits Reservoir (EEPROM), random access memory (ROM) and the chip operating system (COS) being solidificated in read-only memory (ROM), Chip is integrated with cryptographic calculation coprocessor also to improve safety and operating rate in blocking, and patrols its technical indicator significantly larger than Collect encrypted card.

CPU card is due to having the function of micro process, so that being significantly larger than logic add in terms of transactions velocity and data interference Close card, and allow multiple cards while operating, there is anti-collision mechanism.

CPU card is a kind of IC card with micro-chip processor, can be performed cryptographic calculation and other operations, memory capacity compared with Greatly, it can apply to different systems；Logic encryption card is a kind of single storage card, and being mainly characterized by inside has read-only storage Device, but memory capacity is small compared with CPU card, makes it in terms of purposes without scalability.

In safe and secret aspect (logic encryption card and CPU card):

Logic encryption card has the storage IC card for preventing from arbitrarily rewriting information in card function, operates when to encrypted card Shi Bixu checks password in card first, and only verification is correct, when sending out a string of correct answer signals in card, could carry out to card Correctly operation, but due to only once being authenticated, and without other safety precautions, it is easy to cause the leakage and puppet of password The generation of card, security performance are very low.

Due to having central processing unit and COS operating system in CPU card, when CPU card is operated, encryption reconciliation can be carried out Close algorithm (algorithm and password are all not easy to crack), need to carry out between user and IC card system multiple mutual cipher authentication (and Speed is exceedingly fast), improve the security performance of system, for prevent it is pseudo- block have good effect.

So CPU card not only has the institute of logic encryption card functional, more for logic encryption card and CPU card There are high security not available for logic encryption card, flexibility and supports and the excellent performances such as application extension, and IC from now on Block main trend and the direction of development.

In terms of business:

Logic encryption card water power gas meter can both obtain data in card, then by data by password check identifying procedure Using software cryptography mode there are in E2 in table, due to the versatility of E2, the external world can easily by common interface access with Significant data in table is modified, and when ESAM card is interacted with CPU card built in CPU card table, it is mutually exchanged visits using the authentication mode of hardware level Ask data, it is impossible to parameter is obtained or modified by common interface, ensure that the safety of water power gas meter business and reliable.

ESAM card built-in security processor, is able to carry out DES, the cryptographic calculation of 3DES, with joined during at luck Random number, supports multi-stage key management system, and different meter ensure that subscriber card can one using the ESAM card of unified standard Card is multi-purpose, can be received into city one-card, realizes a family multilist, the use pattern of one card for multiple uses.

The utility model has the beneficial effects that a kind of water power gas meter, has high security, flexibility and supports to expand with application The excellent performances such as exhibition.

Detailed description of the invention

The utility model is further described with reference to the accompanying drawings and examples.

Fig. 1 is the frame figure of the utility model.

Fig. 2 is the utility model ESAM card wallet recharge procedure.

Fig. 3 is the utility model ESAM card key more new technological process.

Fig. 4 is the purse initialised process of the utility model ESAM card.

Fig. 5 is the utility model cipher key list.

Specific embodiment

The utility model is described in detail below with reference to attached drawing, as shown in Figure 1: a kind of water, electricity and gas of the present embodiment Table comprising CPU card 6 and ESAM card 7, CPU card 6 and ESAM card 7 are interactive, and central processing unit 1, electricity are provided in the CPU card 6 Erasable programmable read-only memory 2 and random access memory 3.

COS operating system is provided in the random access memory 3.

Cryptographic calculation coprocessor 4 is provided in the central processing unit 1.

The 7 built-in security processor of ESAM card carries out the cryptographic calculation of DES, 3DES, with joined during at luck Random number supports multi-stage key management system.

As shown in Fig. 2, being the utility model ESAM card wallet recharge procedure.

As shown in figure 3, being the utility model ESAM card key more new technological process.

As shown in figure 4, being the purse initialised process of the utility model ESAM card.

As shown in figure 5, being the utility model cipher key list.

The CPU card of this patent has highest security level, and CPU card uses dynamic password, and is one close i.e. same with one The authentication password of Zhang Ka, one secondary card of every brush are different from, and effectively prevent repetition to block, data/amount of money illegal modifications on imitated card, card Etc. security breaches, improve the safety of whole system, compared with common IC card, feature is as follows:

Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng The utility model is described in detail according to preferred embodiment, those skilled in the art should understand that, it can be to this The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model It encloses, should all cover in the scope of the claims of the utility model.

Claims (1)

1. a kind of water power gas meter, it is characterised in that: including CPU card (6) and ESAM card (7), CPU card (6) and ESAM card (7) are handed over Mutually, central processing unit (1), Electrically Erasable Programmable Read-Only Memory (2) and random access memory are provided in the CPU card (6) (3), it is provided with COS operating system in the random access memory (3), cryptographic calculation association is provided in the central processing unit (1) Processor (4), ESAM card (7) the built-in security processor carry out the cryptographic calculation of DES, 3DES, with during at luck plus Enter random number, supports multi-stage key management system.