The subsequent invention pertains to the complex field of knowledge encryption and, far more significantly, to an equipment and method for making use of a parity operation to encrypt information for cover.

As a consequence of the value of mental residence, manufacturers generally encrypt knowledge relevant to their mental property (Ip), which includes plans, off-line to safeguard the info and shop the encrypted facts in non-volatile memory or storage medium to make sure that an unauthorized human being doesn't restore the information can, even when he / she gets the storage or storage medium while using the encrypted info.

U.S. patent six,408,073 issued to Hsu et al. for an "encryption circuit to safeguard information in read-only memory" discloses an encryption circuit for protecting info stored in read-only memory (ROM) by implementing the two a pseudo-random generator and an original value seed one / seed 2 to encode ROM data to supply encoded details. Even so, because encryption know-how takes advantage of random figures as parameters, this kind of info security method needs a synchronous random amount generator for decryption. In addition, it requires lots of random amount designs to effectively protect against an unauthorized individual from retrieving data or courses, which suggests that a pseudo-random amount generator requires extremely sophisticated circuitry for encoding and decoding. Hence, the fee boosts considerably. In distinction, a straightforward pseudo-random variety generator for coding and decoding can be used to save lots of expenses, but in this way facts and packages might be simply accessed by an unauthorized human being.

The object on the present creation is always to offer a unit plus a process for making use of a parity procedure to encrypt information for cover, thereby averting the intricate pseudo-random generator from the prior artwork and for that reason preserving costs, also since the load about the processor Stay clear of state from the art and as a consequence improve overall performance.

In accordance with just one facet of the present invention, you can find delivered an apparatus for applying a parity operation to encrypt data for protection. This machine includes: a parity generator, a first parity stage generator along with a parity insertion device. The parity generator generates a parity little bit in accordance by using a date being output, the day comprising a plurality of bits. The main parity place generator generates an insertion posture N (positive integer) to the parity in accordance with a predetermined algorithm. The parity inserting unit inserts the parity bit into a situation amongst the (N-1) th and Nth bits from the day in accordance while using the insertion situation N, thus building encrypted details.

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In accordance with yet another element of the present creation, there is offered a method of making use of a parity procedure to encrypt details for defense. This process consists of: (A) producing a parity little bit in accordance which has a day for being output, the date acquiring a plurality of bits; (B) creating an insert place N (favourable integer) for the parity little bit in accordance having a predetermined algorithm; (C) inserting the parity bit into a position among the (N-1) th and Nth bits in the day in accordance together with the insert situation N produced in move (B), therefore producing encrypted knowledge.

In accordance with nevertheless a further item in the current creation, there may be offered an apparatus for making use of check bits to encrypt information for defense. This unit comprises: a examine bit generator that generates p look at bits by a verify algorithm machine in accordance which has a data to generally be output, the place p is definitely an integer better than or equivalent to one; a primary test little bit area generator which generates insertion positions N 1 , ..., N p (a beneficial integer each individual for N, p) with the p check out bits in accordance which has a predetermined algorithm; plus a verify little bit insertion device which sites the p check out bits in a position between the (N x -1) -th and (N x) -th bit on the information in accordance together with the insertion positions N 1 , ..., N p , which were produced because of the very first check bit position generator, where by x = 1, ..., p, thus building an encrypted datais developed.

In accordance with a further element of the current creation, there exists supplied a technique of applying examine bits to encrypt details for cover. This method consists of: (A) producing p examine bits by a check algorithm unit in accordance having a date to become output, where p is really an integer higher than or equal to 1; (B) creating insertion positions N one , ..., N p (every a favourable integer for N, p) for that p verify bits in accordance with a predetermined algorithm; and (C) inserting the p test bits every right into a place in between the (N x -1) th and (N x ) th bits in the facts in accordance using the insert positions N one , ..., N pgenerated in phase (B), the place x = 1, ..., p, whereby the encrypted info is produced.

Brief DESCRIpTION With the DRAWINGS
one Determine three is often a block diagram of an equipment for making use of a parity operation to encrypt info for cover in accordance together with the invention;

two is actually a circuit of the parity insertion device one in accordance along with the invention;

3 can be a circuit of the parity removing device 1 in accordance using the creation;

4Figure three is a block diagram of the software in accordance with all the invention; and

five Figure 3 is a block diagram of one more software in accordance while using the creation.

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