CN102594548A - Method capable of achieving data sectional encryption and decryption - Google Patents
Method capable of achieving data sectional encryption and decryption Download PDFInfo
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- CN102594548A CN102594548A CN2012100775044A CN201210077504A CN102594548A CN 102594548 A CN102594548 A CN 102594548A CN 2012100775044 A CN2012100775044 A CN 2012100775044A CN 201210077504 A CN201210077504 A CN 201210077504A CN 102594548 A CN102594548 A CN 102594548A
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Abstract
The invention discloses a method capable of achieving data sectional encryption and decryption. The method comprises the steps as follows: S101, an encryption module receives an encryption root key and data to be encrypted; S102, the encryption module analyzes the data to be encrypted, obtains the length of each data section, encryption algorithm, an encryption sequence and encryption data, and divides the data to be encrypted into a plurality of data sections; S103, whether the number of the data sections is larger than 1 is judged, if yes, S105 is carried out, and if not, S104 is carried out; S104, the data to be encrypted is encrypted by the encryption root key; S105, the first encryption sequence data section is encrypted by the encryption root key; S106, the posterior data sections are encrypted by utilizing the previous data sections in sequence; S107, whether all the data sections are encrypted is judged, if yes, S108 is carried out, and if not, the S106 is carried out; and S108, according to the sequence of each data section which is in the data to be encrypted, the encryption results of data sections are combined and then output. The invention has the advantages of high security and flexibility in use.
Description
Technical field
The invention belongs to the data security field, relate in particular to a kind of method that realizes that data sementation is encrypted, deciphered.
Background technology
Along with the fast development of information technology and network technology, it is more and more important that data security becomes.Data security mainly is meant the safety and the data transmission safety of data itself.Data transmission security is meant that data must guarantee safety of data in transmission course, integrality with can not distorting property.Data encryption is acknowledged as the effective ways of method with the protection storage data security of the only practicality of protected data TRANSEC transmission security, is the most important technically defence line of data protection.Data encryption is meant according to specific cryptographic algorithm and key and is transformed into impalpable encrypt data to responsive clear data.When needs, can use with encrypting corresponding cryptographic algorithm and key and be reduced into clear data to encrypt data, be i.e. data decryption.Through data being carried out encryption at transmitting terminal, at receiving terminal the encrypt data of receiving is deciphered, can guarantee the fail safe of data in transmission course.
At present, for the data of transmission, transmitting terminal adopts once mostly and encrypts, and receiving terminal is once deciphered the data that can obtain wanting to the ciphertext of receiving, can guarantee data security to a certain extent like this, can reduce encryption, decrypting process again.But, owing to only data are once encrypted, and useful data is done as a whole the encryption; Information Security is lower; Hacker or malicious attacker crack through the ciphertext to intercepting and capturing probably, and then obtain data expressly, cause data security hidden danger.
Summary of the invention
The present invention be exactly for solve the data single cryptographic security that exists in the prior art low, repeatedly encrypt to realize the problem of complicacy etc.; A kind of realization data sementation encryption, decryption method have been proposed; It will enciphered data be divided into multistage, each segment data encrypted respectively one by one, and can change encryption number of times, the AES to data easily and encrypt order; Improved safety of data, used flexibly.
To achieve these goals, the present invention adopts following technical scheme:
A kind of realization data sementation method of encrypting, its step is:
S101: encrypting module receives to be encrypted root key and wants ciphered data;
S102: encrypting module is resolved and is wanted ciphered data; Obtain the encryption descriptor and the data message of each data segment; AES that the length of this data segment data message that said encryption descriptor comprises at least, this data segment adopt and encryption order information, encrypting module will ciphered data be divided into a plurality of data segments based on the length of each data segment data message;
S103: whether judge the number of resolving the data segment that obtains greater than 1, if, execution in step S105; Otherwise, execution in step S104;
S104: the data segment number is 1; AES according to this data segment; With encrypting root key the data message of this data segment is encrypted, encryption enciphered data that obtains and the deciphering descriptor combination of describing this enciphered data relevant information are exported as data encrypted;
S105: based on first AES of encrypting the order data segment; With the encryption root key first data message of encrypting the order data segment is encrypted, with encryption enciphered data that obtains and the deciphering descriptor combination of describing this enciphered data relevant information encrypted result as the first encryption order data segment;
S106: successively based on encrypt encrypt in two adjacent data segments of order order after the AES of data segment; Utilize to encrypt the data message of order in preceding data segment as encryption key to said encryption order after the data message of data segment encrypt, with encryption enciphered data that obtains and the deciphering descriptor combination of describing this enciphered data relevant information as said encryption order after the encrypted result of data segment;
S107: judge whether all data segments have all accomplished encryption, if, execution in step S108; Otherwise, execution in step S106;
S108: the encrypted result of each data segment made up as data encrypted according to the precedence of each data segment in wanting ciphered data successively export.
The decipherment algorithm that the AES that said deciphering descriptor comprises the length of encrypting the enciphered data obtain at least, use when encrypting with this enciphered data is corresponding, with the corresponding deciphering order of this enciphered data encryption order.
Said encrypting module is supported a kind of AES among AES, 3DES, the SMS4 at least.
A kind of method that realizes the data sementation deciphering, its step is:
S201: deciphering module receiving and deciphering root key with want decrypted data;
S202: deciphering module is resolved and is wanted decrypted data; Obtain to want the deciphering descriptor and the enciphered data of each data segment in the data decryption; The deciphering descriptor comprises the decipherment algorithm and the deciphering order information of enciphered data of length, this data segment of the enciphered data of this data segment at least, and deciphering module will decrypted data be divided into a plurality of data segments based on the length of the enciphered data of each data segment then;
S203: whether judgment data section number greater than 1, if, execution in step S205; Otherwise, execution in step S204;
S204: the data hop count is 1, according to the decipherment algorithm of this data segment, utilizes the deciphering root key that the enciphered data in the data segment is deciphered, the data after the output deciphering;
S205: according to the decipherment algorithm of the first deciphering order data segment, utilize the deciphering root key that the enciphered data of the first deciphering order data segment is deciphered, obtain decrypted result;
S206: successively based on deciphering order in adjacent two data segments of deciphering order after the decipherment algorithm of data segment; Utilize the deciphering order the decrypted result of preceding data segment as decruption key to said deciphering order after data segment in enciphered data decipher, obtain said deciphering order after the decrypted result of data segment;
S207: judge whether all data segments have all accomplished deciphering, if, execution in step S208; Otherwise, execution in step S206;
S208: the decrypted result of each data segment is made up as the data after the deciphering according to the precedence of each data segment in wanting decrypted data.
Said deciphering module is supported a kind of algorithm among AES, 3DES, the SMS4 at least.
The invention has the beneficial effects as follows: the present invention will enciphered data be divided into a plurality of data segments; Each data segment is encrypted respectively; And want the AES of each data segment, length, use in the enciphered data and encrypt order and can under the situation that does not change encrypting module and deciphering module, change, have safely, realize convenient, flexible; Complexity is low, is easy to advantages such as expansion.
Description of drawings
Fig. 1 is that encrypting module connects sketch map;
Fig. 2 is the schematic flow sheet that realization data sementation according to the invention is encrypted;
Fig. 3 wants the ciphered data structural representation;
Fig. 4 is a structural representation of wanting each data segment in the ciphered data;
Fig. 5 is that deciphering module connects sketch map;
Fig. 6 is a structural representation of wanting decrypted data;
Fig. 7 is a structural representation of wanting each data segment in the decrypted data;
Fig. 8 is the schematic flow sheet of realization data sementation deciphering according to the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes a part of the present invention, and illustrated embodiment of the present invention and explanation thereof are used to explain the present invention, and improper qualification of the present invention in pairs inadequately.
As shown in Figure 1, encrypting module receives to be encrypted root key and wants the ciphered data input, the output data encrypted.
As shown in Figure 2, ciphered data to form by a plurality of ciphered data sections of wanting.
As shown in Figure 3, each wants the ciphered data section to form by encrypting descriptor and data message, wherein, encrypts descriptor and comprises the length of this data segment data message, the encryption order that this data segment will adopt AES and this data segment at least.
As shown in Figure 4, realize the data sementation method of encrypting, its step is:
S101: encrypting module receives to be encrypted root key RKEY and wants ciphered data DATA;
S102: encrypting module is resolved and is wanted ciphered data DATA; Obtain the encryption descriptor and the data message of each data segment; The encryption descriptor of each data segment comprises the length of this data segment data message, AES that this each segment data adopts and the encryption order of this each segment data at least, will be divided into n data segment by DATA based on the length of data segment data message;
S103: whether judge the number n of resolving the data segment that obtains greater than 1, if, execution in step S105; Otherwise, execution in step S104;
S104: the data segment number is 1; AES according to this data segment employing; Promptly want the data message among the ciphered data DATA to encrypt with encrypting root key RKEY to data segment; With encryption enciphered data that obtains and the deciphering descriptor combination of describing this enciphered data relevant information, export as data encrypted EDATA;
S105: the encryption order of each data segment that obtains according to parsing is labeled as D successively with each data segment
1..., D
n, wherein n is the natural number greater than 1, encrypts order data segment D according to first
1AES, encrypt order data segment D with encrypting root key RKEY to first
1In data message encrypt, the enciphered data that encryption is obtained and the deciphering descriptor combination of describing this enciphered data relevant information as first encrypt the order data segment encrypted result ED
1
S106: according to encrypt order after data segment D
M+1AES, utilize to encrypt order at preceding data segment D
mIn data message as encryption key to encrypt order after data segment D
M+1In data message encrypt, the enciphered data that encryption is obtained and the deciphering descriptor combination of describing this enciphered data relevant information as the encryption order after the encrypted result ED of data segment
M+1, wherein m is more than or equal to 1 and less than the natural number of n;
S107: judge whether all data segments have all accomplished encryption, if, execution in step S108; Otherwise the m value increases by 1, execution in step S106;
S108: with each data segment D
1..., D
nEncrypted result ED
1..., ED
nMaking up the back successively according to the precedence of each data segment in wanting ciphered data exports as data encrypted EDATA.
The decipherment algorithm that the AES that said deciphering descriptor comprises the length of encrypting the enciphered data obtain at least, use when encrypting with this enciphered data is corresponding, with the corresponding deciphering order of this enciphered data encryption order.
Said encrypting module is supported a kind of AES among AES, 3DES, the SMS4 at least.
As shown in Figure 5, deciphering module receives wants decrypted data EDATA to conciliate heave root key RKEY input, the data after the output deciphering.
As shown in Figure 6, decrypted data to form by a plurality of decrypted data sections of wanting.
As shown in Figure 7, the decrypted data section to form by deciphering descriptor and enciphered data, wherein, the deciphering descriptor comprises the length of enciphered data in this data segment, the decipherment algorithm of this data segment employing and the deciphering order of this data segment at least.
As shown in Figure 8, realize the method that data sementation is deciphered, its step is:
S201: deciphering module receiving and deciphering root key RKEY with want decrypted data EDATA;
S202: deciphering module is resolved and is wanted decrypted data EDATA; Obtain the deciphering descriptor and the enciphered data of each data segment among the EDATA; The deciphering descriptor comprises the decipherment algorithm and the deciphering order information of enciphered data of length, this data segment of the enciphered data of this data segment at least, and deciphering module will be divided into n data segment by decrypted data EDATA based on the length of the enciphered data of each data segment then;
S203: whether judgment data section number n greater than 1, if, execution in step S205; Otherwise, execution in step S204;
S204: the data hop count is 1, promptly wants the decipherment algorithm of decrypted data EDATA according to this data segment, utilizes deciphering root key RKEY the enciphered data in the data segment to be deciphered the data DATA after the output deciphering;
S205: the deciphering order of each data segment that obtains according to parsing is labeled as ED successively with each data segment
1..., ED
n, wherein, n is the natural number greater than 1, according to the first deciphering order data segment ED
1Decipherment algorithm, utilize deciphering root key RKEY to the first deciphering order data segment ED
1In enciphered data decipher, obtain D
1, m=1 is set;
S206: according to the deciphering order after data segment ED
M+1Decipherment algorithm, utilize the deciphering order at preceding data segment ED
mDecrypted result D
mTo the deciphering order after data segment ED
M+1In enciphered data decipher, obtain D
M+1
S207: judge whether all data segments have all accomplished deciphering, if, execution in step S208; Otherwise the m value increases by 1, execution in step S206;
S208: with each data segment ED
1..., ED
nDecrypted result D
1..., D
nMake up the back successively as the data DATA output after deciphering according to the precedence of each data segment in wanting decrypted data.
Said deciphering module is supported a kind of algorithm among AES, 3DES, the SMS4 at least.
The foregoing description is of the present inventionly more preferably to select, other embodiment that on basis of the present invention, makes amendment or expand, and this area person skilled can be easy to expect and realize that the present invention repeats no more.
Claims (5)
1. realize the data sementation method of encrypting for one kind, it is characterized in that its step is:
S101: encrypting module receives to be encrypted root key and wants ciphered data;
S102: encrypting module is resolved and is wanted ciphered data; Obtain the encryption descriptor and the data message of each data segment; AES that the length of this data segment data message that said encryption descriptor comprises at least, this data segment adopt and encryption order information, encrypting module will ciphered data be divided into a plurality of data segments based on the length of each data segment data message;
S103: whether judge the number of resolving the data segment that obtains greater than 1, if, execution in step S105; Otherwise, execution in step S104;
S104: the data segment number is 1; AES according to this data segment; With encrypting root key the data message of this data segment is encrypted, encryption enciphered data that obtains and the deciphering descriptor combination of describing this enciphered data relevant information are exported as data encrypted;
S105: based on first AES of encrypting the order data segment; With the encryption root key first data message of encrypting the order data segment is encrypted, with encryption enciphered data that obtains and the deciphering descriptor combination of describing this enciphered data relevant information encrypted result as the first encryption order data segment;
S106: successively based on encrypt encrypt in two adjacent data segments of order order after the AES of data segment; Utilize to encrypt the data message of order in preceding data segment as encryption key to said encryption order after the data message of data segment encrypt, with encryption enciphered data that obtains and the deciphering descriptor combination of describing this enciphered data relevant information as said encryption order after the encrypted result of data segment;
S107: judge whether all data segments have all accomplished encryption, if, execution in step S108; Otherwise, execution in step S106;
S108: the encrypted result of each data segment made up as data encrypted according to the precedence of each data segment in wanting ciphered data successively export.
2. realization data sementation method of encrypting as claimed in claim 1; It is characterized in that, the decipherment algorithm that the AES that said deciphering descriptor comprises the length of encrypting the enciphered data obtain at least, use when encrypting with this enciphered data is corresponding, with the corresponding deciphering order of this enciphered data encryption order.
3. realization data sementation method of encrypting as claimed in claim 1 is characterized in that said encrypting module is supported a kind of AES among AES, 3DES, the SMS4 at least.
4. method that realizes data sementation deciphering is characterized in that its step is:
S201: deciphering module receiving and deciphering root key with want decrypted data;
S202: deciphering module is resolved and is wanted decrypted data; Obtain to want the deciphering descriptor and the enciphered data of each data segment in the data decryption; The deciphering descriptor comprises the decipherment algorithm and the deciphering order information of enciphered data of length, this data segment of the enciphered data of this data segment at least, and deciphering module will decrypted data be divided into a plurality of data segments based on the length of the enciphered data of each data segment then;
S203: whether judgment data section number greater than 1, if, execution in step S205; Otherwise, execution in step S204;
S204: the data hop count is 1, according to the decipherment algorithm of this data segment, utilizes the deciphering root key that the enciphered data in the data segment is deciphered, the data after the output deciphering;
S205: according to the decipherment algorithm of the first deciphering order data segment, utilize the deciphering root key that the enciphered data of the first deciphering order data segment is deciphered, obtain decrypted result;
S206: successively based on deciphering order in adjacent two data segments of deciphering order after the decipherment algorithm of data segment; Utilize the deciphering order the decrypted result of preceding data segment as decruption key to said deciphering order after data segment in enciphered data decipher, obtain said deciphering order after the decrypted result of data segment;
S207: judge whether all data segments have all accomplished deciphering, if, execution in step S208; Otherwise, execution in step S206;
S208: the decrypted result of each data segment is made up as the data after the deciphering according to the precedence of each data segment in wanting decrypted data.
5. the method for realization data sementation deciphering as claimed in claim 4 is characterized in that said deciphering module is supported a kind of algorithm among AES, 3DES, the SMS4 at least.
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| CN109753010A (en) * | 2019-01-15 | 2019-05-14 | 江苏东方赛光电有限公司 | A kind of real-time level monitoring data acquisition early warning system |
| CN110768786A (en) * | 2019-10-29 | 2020-02-07 | 上海交通大学 | Information segmentation encryption and decryption combination system and method based on AES algorithm |
| CN111654511A (en) * | 2020-07-13 | 2020-09-11 | 中国银行股份有限公司 | Chained data encryption method, chained data decryption method and corresponding systems |
| CN113194015A (en) * | 2021-04-29 | 2021-07-30 | 洪璐 | Internet of things intelligent household equipment safety control method and system |
| CN113285964A (en) * | 2021-07-23 | 2021-08-20 | 芯华章科技股份有限公司 | Communication method, electronic device, and storage medium |
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