KR20100087437A - Method, apparatus and computer-readable recording medium for operating compression and encryption of data - Google Patents

Abstract

PURPOSE: A method, an apparatus and a computer-readable recording medium for operating compression and encryption of data are provided to supply high operation efficiency through removal of a duplicated substitution operation by simultaneously combining a compression algorithm with an encryption algorithm and performing those two algorithms. CONSTITUTION: A modular operation unit performs the modular operation for a random number and the coefficient of a prefix symbol code having and the same length with the random number string from a random number generator. A prefix code output unit outputs a prefix code including the data placed at a position jumping over as many as the result value of the modular operation from the encoding data depending on the input data of Hoffman encoding/RC4 combining module(508).

Description

METHOD, APPARATUS AND COMPUTER-READABLE RECORDING MEDIUM FOR OPERATING COMPRESSION AND ENCRYPTION OF DATA}

The present invention relates to a method, an apparatus and a computer-readable recording medium for compression and encryption operations on data, and more particularly, to allocating memory while eliminating redundancy of substitution operations by performing a combination of compression and encryption algorithms. And a method, apparatus, and computer-readable recording medium for compression and encryption operations that can provide high computational efficiency by reducing the number of operations associated with decommissioning.

Due to the recent flood of data or information, the importance of data processing technology is increasing day by day.

Widely used for communication and data storage, data compression refers to the process of reducing the number of bits used to represent a given piece of data. . Data compression involves two processes, one of which is the process of compressing or encoding data to reduce its size, and the other of restoring or decrypting it to its original state.

Data compression is possible because all data can be expressed in an informative context called entropy. Compression is possible because most data is represented using more bits than the number of bits suggesting that the entropy of the data is optimal. There are two types of data compression methods: lossy and lossless. There are many kinds of lossless compression algorithms, but most commonly used compression algorithms are gzip compression algorithm and bzip compression algorithm. The gzip compression algorithm is a compression algorithm that combines LZ77 compression algorithm and Hoffman encoding. The bzip compression algorithm is a compression algorithm that combines Hoffman encoding after BWT and MTF conversion. It is widely applied to file compression and communication.

On the other hand, data encryption refers to the conversion of predetermined information into an unknown form (cipher text), and means for safeguarding the information by storing the information in a cipher text in a storage device or transmitting it through a communication line. To provide. Encryption uses an encryption key (a specific bit string) to convert the information into a ciphertext, and decryption uses a decryption key to restore the encrypted information to the original information. Since the person who does not have the decryption key cannot restore the information correctly, the encrypted information can be protected if the decryption key is unknown to the third party. Cryptographic systems are largely classified into symmetric cryptography and public key cryptography. Among them, the symmetric encryption method is a method in which the same key is used for encryption and decryption, and when communicating, the sender and the receiver need to have the same key as a secret in advance. On the other hand, the public key cryptography method uses different keys for encryption and decryption, but the encryption key is public and the decryption key is secret. In general, public key cryptography is much larger than symmetric cryptography, so it is used for authentication, and symmetric cryptography is more used for secure communication.

Symmetric cryptographic algorithms are further divided into block cipher algorithms and stream cipher algorithms. Among them, the block cipher algorithm is an algorithm that performs encryption on a block basis. Among the block cipher algorithms, the AES compression algorithm has been adopted as an international standard. On the other hand, the stream encryption algorithm refers to an encryption system that generates a random sequence with a random sequence generator and treats plain text as a series of bit strings and performs XOR operation 1 bit at a time (sometimes in byte units) and encrypts it. It is faster than block encryption algorithm. As the stream encryption algorithm, RC4 encryption algorithm is widely used among various methods.

1 is a diagram illustrating a basic flowchart of a data compression and encryption operation according to the prior art.

First, when data to be transmitted or stored is generated, a memory allocation operation for generating a buffer for compression and a table for substitution is performed (S100). Thereafter, data is read from the input stream of information (S101). Thereafter, compression is performed by performing a gzip algorithm (S102). The gzip algorithm is a commercially available compression algorithm defined in RFC1897, which is achieved by compressing the resultant value by Huffman encoding method (S102b) (S102b). When one gzip algorithm is finished, the result value, that is, the result of compression is output to the buffer (S103). This process is repeated until the end of the stream. After determining whether the streams are all finished in the process (S105), if it is determined that the streams are all finished, the memory for the buffer and the table that has been allocated is released (S109). This starts encryption and operation. In general, the encryption operation uses AES or RC4 encryption, which is a symmetric key, but assumes that AES is used in FIG. AES is a block cipher format designated as a U.S. government standard that replaces the previous DES, and the National Institute of Standards and Technology (NIST) went through a five-year standardization process to the Federal Information Processing Standard (FIPS 197) on November 26, 2001. Announced. Effective as of May 26, 2002. The AES algorithm performs key expansion operation to expand the input key, XOR operation to conceal data input from the user, substitution operation using SBOX, shift row, and mix column operation. Iteratively performs the data concealment. In order to perform such an operation, first, data is read from the buffer (S104), memory allocation operations for the SBOX and the buffer must be performed (S107), and the encryption operation is performed in units of 16 bytes. This should be done. That is, it is determined whether the buffer is over (S108), and the operation must be repeatedly performed until the buffer according to the capacity is over. During this process, encryption operation (S106) and memory allocation operation (S107) are performed, thereby increasing the computational overhead. In addition, since the compression algorithm S102 and the encryption algorithm S106 both cause the repetition of the mathematical operations S102 and S106 and the memory allocation / release operations S100, S109, S107, and S110, the system overhead is also weighted. There is a problem that can cause a performance degradation of the system. To solve this problem, it is necessary to have a processor with higher performance, which is very inefficient in terms of cost.

As such, the compression algorithm can be used to reduce the size of the data, enabling efficient storage and communication of data, and the use of encryption algorithms enables secure storage and communication of the data, but many mathematical operations are performed. In addition, there is a problem that the performance degradation of the system occurs due to redundant substitution and memory operations performed in this process.

The present invention aims to solve the above-mentioned problems of the prior art.

It is also an object of the present invention to provide a high computational efficiency by eliminating redundant substitution operations by combining data compression and encryption algorithms simultaneously.

Meanwhile, another object of the present invention is to perform a combination of a compression algorithm and an encryption algorithm, and to process and manage operations related to allocation, initialization, and release of memory collectively, thereby unnecessary memory allocation before and after the start and end of each algorithm. And eliminating the need for decommissioning, eliminating unnecessary inter-memory copy operations, and eliminating unnecessary repetitive operations to increase throughput of compression and encryption per unit time.

According to an embodiment of the present invention for achieving the above object, allocating and initializing all the memory required for the compression operation and encryption operation, compression algorithm, Hoffman encoding algorithm and AES encryption in bytes for the initial output data Performing an algorithm, performing a compression algorithm and a Hoffman encoding algorithm / RC4 encryption algorithm combining operation after the compression algorithm, the Hoffman encoding algorithm, and the AES encryption algorithm for initial output data are completed, and releasing the memory. A compression and encryption operation method is provided that includes.

The performing of the Hoffman encoding algorithm / RC4 encryption algorithm combining operation may include: (a) initializing a secret key value for generating a random number string necessary for performing the RC4 cipher and the algorithm; and (b) generating the random number string. And initializing the RC4 encryption algorithm to generate the random number string and randomly replacing values of an internal table used in the Hoffman encoding algorithm.

Here, the step (a) may include the step of initializing the secret key value using the result value encrypted by the AES encryption algorithm.

In the step (c), the modulo operation is performed on the generated random number string and the number of prefix codes having the same length as the random number string, and the Hoffman encoding algorithm / RC4 encryption algorithm combining operation. Outputting a prefix included in data of a position skipped by a result value of the modulo operation from encoded data according to input data that is a target of the input data; input data that is a target of the Hoffman encoding algorithm / RC4 encryption algorithm combining operation The method may include performing an XOR operation on a suffix of encoded data and a random number column having the same length as the suffix and outputting a result value.

Here, the compression algorithm may be an LZ77 compression algorithm.

Here, the compression algorithm may be an algorithm in which a BWT transform operation and an MTF transform operation are sequentially performed.

According to another embodiment of the present invention, a method for performing a combination of the Hoffman encoding algorithm and the RC4 encryption algorithm, comprising: a module for the number of random numbers generated from a random number generator and a prefix code having the same length as the random number; Performing a mod operation, outputting a prefix included in data of a position skipped from the encoded data according to the input data by the result of the modulo operation, and a suffix of the encoded data according to the input data And performing an XOR operation on a random number string having the same length as the suffix and outputting a result value.

According to another embodiment of the present invention, a memory management module for allocating, initializing, releasing, and managing all memories required for compression and encryption operations, and a compression algorithm, Hoffman encoding algorithm, and AES encryption algorithm for initial output data are provided. After completion, a compression and encryption operation apparatus is provided that includes a Hoffman encoding / RC4 combining module that performs a compression algorithm and a Hoffman encoding algorithm / RC4 encryption algorithm combining operation.

The memory management module may include a first pointer indicating a memory for storing a hash table used for the compression algorithm, a second pointer indicating two trees for performing the Hoffman encoding algorithm, and the RC4 encryption algorithm. A third pointer pointing to a value for a key for performing a second pointer, a fourth pointer pointing to a buffer for storing output values of the compression and encryption operations, and a fifth pointer pointing to a location at which a previous compression operation is being processed. And a directory for storing a sixth pointer for indicating a location where a previous encryption operation is being processed, a seventh pointer for pointing to an input buffer of the compression algorithm, and an eighth pointer for pointing to a previously processed location. It may be.

Herein, the Hoffman encoding / RC4 combining module modulates a random number heat generator that generates a random number string, a random number string from the random number heat generator, and a number of prefix codes having the same length as the random number string. A modulo operation unit for performing the operation, a prefix output unit for outputting a prefix included in the data of the position skipped by the result value of the modulo operation from the encoding data according to the input data of the Hoffman encoding / RC4 combining module, the Hoffman A suffix code for encoding data according to input data of an encoding / RC4 combining module, an XOR operation unit performing an XOR operation on a random number string having the same length as the suffix code, and a suffix code outputting an output value of the XOR operation unit as a suffix code It may also include wealth.

In addition, according to another embodiment of the present invention, another method for providing an efficient operation method by combining a compression algorithm and an encryption algorithm, and a computer readable recording medium for recording a computer program for executing such a method can be provided. have.

According to the present invention, since the data compression algorithm and the encryption algorithm are combined and performed at the same time, redundant substitution operations can be eliminated, thereby achieving high computational efficiency.

On the other hand, according to the present invention, since the operations related to the allocation, initialization and release of memory are collectively processed and managed in the combination of the compression algorithm and the encryption algorithm, unnecessary memory allocation before and after the start and end of each algorithm is performed. And eliminating the need for release, eliminating unnecessary inter-memory copy operations, and eliminating unnecessary repetitive operations, thereby increasing throughput of compression and encryption per unit time.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention.

Combination of Compression and Encryption Operations

2A is a diagram illustrating a flowchart of all operations combined with a compression operation and an encryption operation according to an embodiment of the present invention. Here, it is assumed that the output of the initial data is 255 bytes.

Referring to FIG. 2A, the compression operation and the encryption operation method according to the present invention do not allocate and release the memory necessary for compression and encryption in each algorithm, and all the memory allocation and initialization required for the compression and encryption operation are performed at once in step S200. Will be performed. It is also managed by the compression and encryption computational memory management module.

When the memory required for compression and encryption of data to be transmitted or stored is allocated and initialized (S200), an internal counter set to an initial value of 0 is allocated (S204), and data is read from the input stream (S201). The internal counter is for counting the number of times compression and encryption operations are performed, that is, the byte size in which compression and encryption are performed.

Next, the counter is increased by one (S205), and a compression algorithm is performed (S202). The compression algorithm may be a conventional gzip algorithm in which the LZ77 algorithm S202 and the Hoffman encoding scheme S203 are combined. This compression algorithm is performed on the initial data output, that is, 255 bytes. In this process, after the L7ZZ algorithm S202 and the Huffman encoding scheme S203 are performed, the AES encryption algorithm S207 is performed. In this process, the bzip algorithm may be used instead of the gzip algorithm. In this case, as shown in FIG. 2B, the LZ77 compression algorithm S202 is replaced by the BWT transform operation S216 and the MTF transform operation S217. According to the present invention, the allocation and initialization of all the memory required for the compression and encryption operation has already been completed in step S200, which is managed by the compression and encryption operation memory management module, thereby eliminating the need for operations related to memory allocation and release.

On the other hand, whether or not the compression algorithm for 255 bytes is performed can be determined from the value of the counter that counts the number of bytes of compression and encryption. If the value of the counter is larger than 255, that is, when the compression and encryption operation for 255 bytes is completed, compression is performed by the L7ZZ algorithm (S202) as before, but combined with RC4, which is an encryption algorithm in the Huffman encoding part. Will be.

The RC4 algorithm is a stream cipher system developed by Ron Rivest of RSA Data Security, which generates pseudorandom strings of arbitrary length according to an externally provided key and encrypts them through plain text and XOR operations. Algorithm to be performed. The RC4 algorithm requires very few operations in performing cryptographic operations compared to the AES algorithm.

In the RC4 encryption operation, an RC4 initialization step S209 for generating a random number string is performed. Originally, the result of Huffman encoding and the random number string from the random number generator of RC4 are XORed. However, in the present invention, the secret key value 210 for random number generation of RC4 is input to the commonly used 128-bit key 211. Instead, it is initialized using the result value 212 of 255 bytes (= 2040 bits) encrypted through the AES encryption algorithm (S207) and randomly substituted the value of the internal Hoffman table using the value from the random number generator. Will be performed by the Hoffman encoding / RC4 combining module. That is, an operation in which the Hoffman encoding and the RC4 algorithm are combined in the Hoffman encoding / RC4 combining module is performed (S208). Accordingly, the compression operation and the encryption operation can be simultaneously performed in a method that is computationally very efficient compared to the existing method, without degrading the original encryption security. The combination of the Hoffman encoding method and the RC4 algorithm will be described in detail later with reference to FIGS. 3 and 4.

After the processing of the compression and encryption operations of all the input data is completed, the compression and encryption operation memory management module releases the memory (S213). After that, all operations are completed (S214). The compression and encryption algorithm of the present invention combines the RC4 encryption algorithm with the Hoffman encoding algorithm, effectively reducing redundant mathematical operations.

Combined Hoffman encoding algorithm with RC4 algorithm

In the following description, a method of combining the Huffman encoding algorithm and the RC4 algorithm performed in step S208 in the compression and encryption calculation method of FIG. 2A will be described. For this purpose, the conventional Hoffman encoding algorithm and the RC4 algorithm will be described first.

Hoffman encoding algorithm and RC4 algorithm

3 is a diagram illustrating a Hoffman encoding algorithm and an RC4 algorithm according to a conventional method. First, FIG. 3A is a diagram for describing the conventional Hoffman encoding algorithms 300 and 301, and FIG. 3B is a diagram for explaining the conventional RC4 algorithm 302.

Referring to FIG. 3A, the Hoffman encoding algorithms 300 and 301 are algorithms for generating a prefix 303 (signs for one character not prefixed with other codes) from the frequency of the characters. The longer the code, the higher the frequency, the shorter the code. Hoffman encoding algorithms 300 and 301 always produce an optimal prefix 303 for a given frequency, and the encoding table for the Hoffman encoding algorithm includes a table for encoding for the character 304 and the matching length 305 and It may consist of a table for representing the distance 306. The gzip algorithm described above consists of the LZ77 algorithm and the Hoffman encoding algorithm. The output of the LZ77 algorithm is divided into a character 304, a matching length 305, and a distance 306, and is referred to as "character 304 and matching length 305". Hoffman tree 300 representing the, and Hoffman tree 301 representing the distance 306 may be composed of two. At this time, the value of the data 255 byte is matched to the character 304, and the encoding for the length is matched to the length 305 is expressed. The value 307 of each table means a value to be encoded, and each entry is attached with a suffix 308 so that it can be encoded with multiple characters even if they have the same prefix 303. For example, the third column 309 of the matching length 305 portion corresponds to the length "33" to the length "41" and is one of the length "33" to the length "41" by the suffix 3 bit 310. Is assumed to be selected, when information about the matching length is inputted, the prefix becomes "0000011" (309) and the corresponding column is represented by eight length informations by the 3-bit suffix 310. The corresponding suffix "010" 310 is input and the encoding is completed. Also, in the same principle, in the Hoffman tree 301 for the distance, the fourth column 311 corresponds to the length "250" to the length "257" and the length "250" to the length "257 by the suffix 3 bit 312. Assuming that one of "is selected, when information about distance" 250 "is entered, it corresponds to the fourth column 311, which consists of a 3-bit suffix 312, which is encoded as" 000 ". will be. In creating the Hoffman tree, the bit length is allocated according to the frequency of characters, so that the less characters are used, the longer ones are used, and the more characters are shorter characters. Will be.

Meanwhile, referring to FIG. 3B, the RC4 algorithm 302 is a stream encryption system developed by Ron Rivest of RSA Data Security, which is similar in arbitrary length according to an externally provided key 313. The algorithm generates a random number string (314), performs an XOR operation with the plain text (315), and completes encryption.

Combined Hoffman encoding algorithm with RC4 algorithm

4 is a view for explaining a method of combining the Hoffman encoding algorithm and the RC4 algorithm according to an embodiment of the present invention.

In the existing Hoffman encoding algorithms 300 and 301 described with reference to FIG. 3A, when input data is input, the Hoffman encoding algorithm encodes a specific bit string according to the Hoffman tree. However, referring to FIG. 4, the Hoffman encoding algorithm of the present invention is combined with the RC4 algorithm. First, when the encoding data 400 according to the input data 410 is determined, the 8-bit information generated by the random number generator 401 is read, and the number of prefix codes 402 having such a bit length is determined. Mod operation 411 is performed. Thereafter, the prefix 404 obtained by skipping from the encoded data 400 by the result value 403 is output as an encoding value. The result is a value indicated by reference numeral 408. Meanwhile, encoding for a suffix is performed in the following manner. First, a random number string 406 as long as the suffix length 405 is read and the XOR operation 407 is taken along with the suffix. As a result, the value 409 is output as the encoding value.

According to the method of the present invention, it is possible to perform XOR operation on all Hoffman encoding strings and to simultaneously perform Huffman encoding algorithm and substitution operation, thereby increasing operation efficiency and increasing security by taking XOR operation on suffixes. .

Compression and Encryption Operational Memory Management Module

Hereinafter, the configuration of the compression and encryption operation memory management module will be described.

5 is a diagram illustrating a configuration of a compression and encryption operation memory management module according to an embodiment of the present invention.

As described above, in the case of sequentially performing compression and encryption operations according to the conventional method, the memory required for the compression operation is allocated and released, and the memory required for the encryption operation is separately allocated and released. It involves a copy operation, and there is a problem that it involves unnecessary repetitive operations even in deallocation.

In the present invention, to solve this problem, all the memory required for the compression operation and the encryption operation are collectively managed by the compression and encryption operation memory management module. According to this, the processing overhead according to memory allocation and deallocation can be reduced, thereby further increasing the processing speed per unit time.

As shown in FIG. 5, the compression and encryption operation memory management module of the present invention is composed of a memory table directory 500 and a memory chunk 501 (Chunk).

Again, memory table directory 500 points to memory 503 for storing the hash table 502 used for the LZ77 algorithm, and pointers to two trees 504 and 505 for the Hoffman encoding algorithm. (506, 507), a pointer 509 pointing to the value 508 for the key needed to perform the RC4 algorithm, a pointer 511 pointing to the buffer 510 for storing the output value of the compression and encryption operation. Pointer 512 for indicating the location where the previous compression operation is being processed, pointer 513 for indicating the location where the previous encryption operation is being processed, and pointer 515 pointing to the input buffer 514 of the LZ77 algorithm. And a pointer 516 to indicate the previously processed location.

According to the compression and encryption operation memory management module of the present invention, unnecessary memory allocation and release performed before and after the start and end of each algorithm is eliminated, and unnecessary inter-memory copy operations are eliminated, and unnecessary repetitive operations are also required in allocation allocation. This eliminates the effect. In addition, it is possible to further increase the processing speed per unit time by reducing the computational overhead caused by memory allocation and freeing.

Although the present invention has been described by specific embodiments such as specific components and the like, but the embodiments and the drawings are provided to assist in a more general understanding of the present invention, the present invention is not limited to the above embodiments. For those skilled in the art, various modifications and variations can be made from these descriptions.

Therefore, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, I will say.

1 is a flowchart illustrating a compression and encryption operation method according to the prior art.

2A and 2B are flowcharts illustrating a compression and encryption calculation method according to an embodiment of the present invention.

3A is a diagram for explaining a conventional Hoffman encoding algorithm.

3B is a diagram for explaining a conventional RC4 encryption algorithm.

4 is a flowchart illustrating a Hoffman encoding algorithm / RC4 encryption algorithm combining operation according to an embodiment of the present invention.

5 is a diagram illustrating a configuration of a compression and encryption operation memory management module according to an embodiment of the present invention.

Claims (11)

Allocating and initializing all memory required for compression and encryption operations, Performing a compression algorithm, Hoffman encoding algorithm, and AES encryption algorithm on a byte basis for the initial output data, Performing a compression algorithm and a Hoffman encoding algorithm / RC4 encryption algorithm combining operation after the compression algorithm, the Hoffman encoding algorithm, and the AES encryption algorithm for the initial output data are completed, and Releasing the memory Compression and encryption operation method comprising a. The method of claim 1, The performing of the Hoffman encoding algorithm / RC4 encryption algorithm combining operation, (a) initializing a secret key value for generating a random number string necessary to perform the RC4 cipher and the algorithm; (b) initializing an RC4 encryption algorithm to generate the random number sequence, and (c) generating the random number sequence and using it to randomly replace values in an internal table used in the Hoffman encoding algorithm. The method of claim 2, In step (a), And initializing the secret key value using a result value encrypted by the AES encryption algorithm. The method of claim 2, In step (c), Performing a mod operation on the generated random number string and the number of prefix codes having the same length as the random number string, Outputting a prefix included in data of a position skipped by a result value of the modulo operation from encoding data according to input data that is the target of the Hoffman encoding algorithm / RC4 encryption algorithm combining operation; Performing an XOR operation on a suffix of the encoded data according to the input data that is the target of the Hoffman encoding algorithm / RC4 encryption algorithm and a random number column having the same length as the suffix, and outputting a result value Compression and encryption operation method comprising a. The method of claim 1, The compression algorithm is an LZ77 compression algorithm. The method of claim 1, The compression algorithm is a compression and encryption operation method is an algorithm in which the BWT conversion operation and the MTF conversion operation is performed sequentially. As a method for combining Hoffman encoding algorithm and RC4 encryption algorithm, Performing a mod operation on the number of random numbers generated from the random number generator and a prefix code having the same length as the random number; Outputting a prefix included in data of a position skipped by the result value of the modulo operation from encoding data according to input data, Performing an XOR operation on a suffix of encoding data according to the input data and a random number column having a length equal to the suffix and outputting a result value Hoffman encoding algorithm / RC4 encryption algorithm combining method comprising a. A memory management module that allocates, initializes, frees, and manages all memory required for compression and encryption operations, and Hoffman encoding / RC4 combining module that performs compression algorithm and Hoffman encoding algorithm / RC4 encryption algorithm combining operation after the compression algorithm, Hoffman encoding algorithm, and AES encryption algorithm for the initial output data is completed. Compression and encryption operation device comprising a. The method of claim 8, The memory management module, A first pointer indicating a memory for storing a hash table used in the compression algorithm, A second pointer to two trees for performing the Hoffman encoding algorithm, A third pointer indicating a value for a key for performing the RC4 encryption algorithm, A fourth pointer pointing to a buffer for storing output values of the compression and encryption operation, A fifth pointer to the location where the previous compression operation is being processed, A sixth pointer to the location where the previous encryption operation is being processed, A seventh pointer pointing to the input buffer of the compression algorithm, and Eighth pointer to point to the previously processed location Compression and encryption operation device including a directory for storing the. The method of claim 8, The Hoffman encoding / RC4 combining module, Random number heat generator for generating random number heat, A modulo operation unit performing a mod operation on the number of random number strings from the random number heat generator and a prefix code having the same length as the random number string, A prefix output unit for outputting a prefix included in data of a position skipped by the modulo operation from encoded data according to input data of the Hoffman encoding / RC4 combining module; An XOR operation unit performing an XOR operation on a suffix of encoded data according to input data of the Hoffman encoding / RC4 combining module and a random number string having a length equal to the suffix code; A suffix output unit for outputting the output value of the XOR operation unit as a suffix code Compression and encryption operation device comprising a. A computer-readable recording medium for recording a computer program for executing the method according to any one of claims 1 to 7.

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