CN102594548B - 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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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 data security arts, particularly relate to a kind of method realizing data sectional encryption, deciphering.
Background technology
Along with the fast development of information technology and network technology, data security becomes more and more important.Data security is the safety of index according to itself and the safety of transfer of data mainly.Data transmission security refers to that data must guarantee the fail safe of data in transmitting procedure, integrality and can not tamper.Data encryption is acknowledged as the method for the only practicality of protected data transmission security and the effective ways of protection storage data security, is data protection most important defence line technically.Data encryption refers to, according to specific cryptographic algorithm and key, the clear data of sensitivity is transformed into impalpable encrypt data.When needed, can use and encrypt corresponding cryptographic algorithm and key is reduced into clear data encrypt data, i.e. data deciphering.By being encrypted data at transmitting terminal, at receiving terminal, the encrypt data received being decrypted, the fail safe of data in transmitting procedure can be ensured.
At present, for the data of transmission, transmitting terminal mostly adopts and once encrypts, and receiving terminal once deciphers the data that can obtain wanting to the ciphertext received, and can guarantee data security to a certain extent like this, can reduce encryption, decrypting process again.But, owing to only once encrypting data, and useful data is integrally encrypted, Information Security is lower, hacker or malicious attacker crack likely via to the ciphertext intercepted and captured, and then obtain data clear text, cause incipient fault for data security.
Summary of the invention
The present invention is exactly to solve the problem that the data single cryptographic security existed in prior art is low, repeatedly encrypt realization complexity etc., propose one and realize data sectional encryption, decryption method, it enciphered data will be divided into multistage, each segment data is successively encrypted respectively, and the encryption number of times to data, cryptographic algorithm and encryption order can be changed easily, improve the fail safe of data, use flexibly.
To achieve these goals, the present invention adopts following technical scheme:
Realize a method for data sectional encryption, its step is:
S101: the data that encrypting module receives encryption root key and will encrypt;
S102: encrypting module resolves the data that will encrypt, obtain encryption descriptor and the data message of each data segment, the cryptographic algorithm that the length of this data bin data information that described encryption descriptor at least comprises, this data segment adopt and encryption order information, the data that encrypting module will be encrypted according to the length of each data bin data information are divided into multiple data segment;
S103: judge whether the number of resolving the data segment obtained is greater than 1, if so, perform step S105; Otherwise, perform step S104;
S104: data segment number is 1, according to the cryptographic algorithm of this data segment, be encrypted with the encryption data message of root key to this data segment, combine export encrypting the enciphered data obtained and the deciphering descriptor describing this enciphered data relevant information as the data after encrypting;
S105: according to the cryptographic algorithm of the first encryption order data section, being encrypted with the data message of encryption root key to the first encryption order data section, combining the encrypted result of encrypting order data section as first using encrypting the enciphered data obtained with the deciphering descriptor describing this enciphered data relevant information;
S106: successively according to encrypting the cryptographic algorithm of encrypting the posterior data segment of order in two adjacent data segments of order, utilize the data message in the preceding data segment of encryption order to be encrypted as the data message of encryption key to the posterior data segment of described encryption order, the deciphering descriptor of encrypting enciphered data and this enciphered data relevant information of description obtained is combined the encrypted result as the posterior data segment of described encryption order;
S107: judge whether all data segments complete encryption all, if so, performs step S108; Otherwise, perform step S106;
S108: the encrypted result of each data segment is combined successively according to the precedence of each data segment in the data that will encrypt and exports as the data after encryption.
Described deciphering descriptor at least comprises decipherment algorithm corresponding to the length of encrypting the enciphered data obtained, the cryptographic algorithm used when encrypting with this enciphered data, encrypts deciphering order corresponding to order with this enciphered data.
Described encrypting module at least supports a kind of cryptographic algorithm in AES, 3DES, SMS4.
Realize a method for data sectional deciphering, its step is:
S201: deciphering module receiving and deciphering root key and data to be decrypted;
S202: deciphering module resolves data to be decrypted, obtain deciphering descriptor and the enciphered data of wanting each data segment in data decryption, deciphering descriptor at least comprise the length of the enciphered data of this data segment, the enciphered data of this data segment decipherment algorithm and deciphering order information, then data to be decrypted is divided into multiple data segment according to the length of the enciphered data of each data segment by deciphering module;
S203: judge whether data segment number is greater than 1, if so, performs step S205; Otherwise, perform step S204;
S204: data hop count is 1, according to the decipherment algorithm of this data segment, utilizes deciphering root key to be decrypted the enciphered data in data segment, exports the data after deciphering;
S205: according to the decipherment algorithm of the first deciphering order data section, utilizes the enciphered data of deciphering root key to the first deciphering order data section to be decrypted, obtains decrypted result;
S206: successively according to deciphering the decipherment algorithm deciphering the posterior data segment of order in two adjacent data segments of order, utilize the decrypted result of the preceding data segment of deciphering order to be decrypted the enciphered data in the posterior data segment of described deciphering order as decruption key, obtain the decrypted result of the posterior data segment of described deciphering order;
S207: judge whether all data segments complete deciphering all, if so, performs step S208; Otherwise, perform step S206;
S208: the decrypted result of each data segment is combined as the data after deciphering according to the precedence of each data segment in data to be decrypted.
Described deciphering module at least supports a kind of algorithm in AES, 3DES, SMS4.
The invention has the beneficial effects as follows: the present invention enciphered data will be divided into multiple data segment, each data segment is encrypted respectively, and want each data segment, length in enciphered data, use cryptographic algorithm and encryption order can change when not changing encrypting module and deciphering module, there is fail safe high, realize convenient, flexible, complexity is low, is easy to the advantages such as expansion.
Accompanying drawing explanation
Fig. 1 is encrypting module connection diagram;
Fig. 2 is the schematic flow sheet realizing data sectional encryption of the present invention;
Fig. 3 is the data structure schematic diagram that will encrypt;
Fig. 4 is the structural representation of each data segment in the data that will encrypt;
Fig. 5 is deciphering module connection diagram;
Fig. 6 is the structural representation of data to be decrypted;
Fig. 7 is the structural representation of each data segment in data to be decrypted;
Fig. 8 is the schematic flow sheet realizing data sectional deciphering of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described.
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and illustrated embodiment of the present invention and explanation thereof are for explaining the present invention, and paired not improper restriction of the present invention.
As shown in Figure 1, encrypting module receives encryption root key and inputs with the data that will encrypt, and exports the data after encryption.
As shown in Figure 2, the data encrypted are made up of multiple data segment that will encrypt.
As shown in Figure 3, each data segment that will encrypt by encrypting descriptor and data message forms, wherein, the encryption order that encryption descriptor at least comprises the length of this data bin data information, this data segment will adopt cryptographic algorithm and this data segment.
As shown in Figure 4, realize the method for data sectional encryption, its step is:
S101: the data DATA that encrypting module receives encryption root key RKEY and will encrypt;
S102: encrypting module resolves the data DATA that will encrypt, obtain encryption descriptor and the data message of each data segment, the encryption descriptor of each data segment at least comprises length, this each cryptographic algorithm of segment data employing and encryption order of this each segment data of this data bin data information, and the length according to data bin data information will be divided into n data segment by DATA;
S103: judge whether the number n resolving the data segment obtained is greater than 1, if so, perform step S105; Otherwise, perform step S104;
S104: data segment number is 1, according to the cryptographic algorithm that this data segment adopts, data message in the data DATA that namely will encrypt data segment with encryption root key RKEY is encrypted, combining encrypting the enciphered data obtained with the deciphering descriptor describing this enciphered data relevant information, exporting as the data EDATA after encryption;
S105: according to the encryption order of resolving each data segment obtained, each data segment is labeled as D successively
1..., D
n, wherein n be greater than 1 natural number, according to the first encryption order data section D
1cryptographic algorithm, with encryption root key RKEY to the first encryption order data section D
1in data message be encrypted, combine with the deciphering descriptor describing this enciphered data relevant information the encrypted result ED encrypting order data section as first using encrypting the enciphered data that obtains
1;
S106: according to the posterior data segment D of encryption order
m+1cryptographic algorithm, utilize encryption order preceding data segment D
min data message as encryption key to encryption order posterior data segment D
m+1in data message be encrypted, combine encrypted result ED as encrypting the posterior data segment of order using encrypting the enciphered data that obtains and the deciphering descriptor describing this enciphered data relevant information
m+1, wherein m is the natural number being more than or equal to 1 and being less than n;
S107: judge whether all data segments complete encryption all, if so, performs step S108; Otherwise m value increase by 1, performs step S106;
S108: by each data segment D
1..., D
nencrypted result ED
1..., ED
nexport as the data EDATA after encryption after combining successively according to the precedence of each data segment in the data that will encrypt.
Described deciphering descriptor at least comprises decipherment algorithm corresponding to the length of encrypting the enciphered data obtained, the cryptographic algorithm used when encrypting with this enciphered data, encrypts deciphering order corresponding to order with this enciphered data.
Described encrypting module at least supports a kind of cryptographic algorithm in AES, 3DES, SMS4.
As shown in Figure 5, deciphering module receives data to be decrypted EDATA and conciliates heave root key RKEY input, exports the data after deciphering.
As shown in Figure 6, data to be decrypted is made up of multiple data to be decrypted section.
As shown in Figure 7, data to be decrypted section is by deciphering descriptor and enciphered data forms, and wherein, deciphering descriptor at least comprises the deciphering order of the length of enciphered data in this data segment, decipherment algorithm that this data segment adopts and this data segment.
As shown in Figure 8, realize the method for data sectional deciphering, its step is:
S201: deciphering module receiving and deciphering root key RKEY and data to be decrypted EDATA;
S202: deciphering module resolves data to be decrypted EDATA, obtain deciphering descriptor and the enciphered data of each data segment in EDATA, deciphering descriptor at least comprise the length of the enciphered data of this data segment, the enciphered data of this data segment decipherment algorithm and deciphering order information, then data to be decrypted EDATA is divided into n data segment according to the length of the enciphered data of each data segment by deciphering module;
S203: judge whether data segment number n is greater than 1, if so, performs step S205; Otherwise, perform step S204;
S204: data hop count is 1, according to the decipherment algorithm of this data segment and data to be decrypted EDATA, utilizes deciphering root key RKEY to be decrypted the enciphered data in data segment, exports the data DATA after deciphering;
S205: according to the deciphering order of resolving each data segment obtained, each data segment is labeled as ED successively
1..., ED
n, wherein, n be greater than 1 natural number, according to the first deciphering order data section ED
1decipherment algorithm, utilize deciphering root key RKEY to the first deciphering order data section ED
1in enciphered data be decrypted, obtain D
1, m=1 is set;
S206: according to the posterior data segment ED of deciphering order
m+1decipherment algorithm, utilize deciphering order preceding data segment ED
mdecrypted result D
mto the posterior data segment ED of deciphering order
m+1in enciphered data be decrypted, obtain D
m+1;
S207: judge whether all data segments complete deciphering all, if so, performs step S208; Otherwise m value increase by 1, performs step S206;
S208: by each data segment ED
1..., ED
ndecrypted result D
1..., D
nexport as the data DATA after deciphering after combining successively according to the precedence of each data segment in data to be decrypted.
Described deciphering module at least supports a kind of algorithm in AES, 3DES, SMS4.
Above-described embodiment is of the present inventionly more preferably to select, and other embodiment of modifying in basis of the present invention or expanding, relevant technical staff in the field can be easy to expect and realize, and the present invention repeats no more.
Claims (2)
1. realize a method for data sectional encryption, it is characterized in that, its step is:
S101: the data that encrypting module receives encryption root key and will encrypt; Described encrypting module at least supports a kind of cryptographic algorithm in AES, 3DES, SMS4;
S102: encrypting module resolves the data that will encrypt, obtain encryption descriptor and the data message of each data segment, the cryptographic algorithm that the length of this data bin data information that described encryption descriptor at least comprises, this data segment adopt and encryption order information, the data that encrypting module will be encrypted according to the length of each data bin data information are divided into multiple data segment; Enciphered data will be divided into multiple data segment, each data segment will be encrypted respectively, and want each data segment, length in enciphered data, use cryptographic algorithm and encryption order can change when not changing encrypting module;
S103: judge whether the number of resolving the data segment obtained is greater than 1, if so, perform step S105; Otherwise, perform step S104;
S104: data segment number is 1, according to the cryptographic algorithm of this data segment, be encrypted with the encryption data message of root key to this data segment, combine export encrypting the enciphered data obtained and the deciphering descriptor describing this enciphered data relevant information as the data after encrypting;
S105: according to the cryptographic algorithm of the first encryption order data section, being encrypted with the data message of encryption root key to the first encryption order data section, combining the encrypted result of encrypting order data section as first using encrypting the enciphered data obtained with the deciphering descriptor describing this enciphered data relevant information; Described deciphering descriptor at least comprises decipherment algorithm corresponding to the length of encrypting the enciphered data obtained, the cryptographic algorithm used when encrypting with this enciphered data, encrypts deciphering order corresponding to order with this enciphered data;
S106: successively according to encrypting the cryptographic algorithm of encrypting the posterior data segment of order in two adjacent data segments of order, utilize the data message in the preceding data segment of encryption order to be encrypted as the data message of encryption key to the posterior data segment of described encryption order, the deciphering descriptor of encrypting enciphered data and this enciphered data relevant information of description obtained is combined the encrypted result as the posterior data segment of described encryption order;
S107: judge whether all data segments complete encryption all, if so, performs step S108; Otherwise, perform step S106;
S108: the encrypted result of each data segment is combined successively according to the precedence of each data segment in the data that will encrypt and exports as the data after encryption.
2. realize a method for data sectional deciphering, it is characterized in that, its step is:
S201: deciphering module receiving and deciphering root key and data to be decrypted; Described deciphering module at least supports a kind of algorithm in AES, 3DES, SMS4;
S202: deciphering module resolves data to be decrypted, obtain deciphering descriptor and the enciphered data of wanting each data segment in data decryption, deciphering descriptor at least comprise the length of the enciphered data of this data segment, the enciphered data of this data segment decipherment algorithm and deciphering order information, then data to be decrypted is divided into multiple data segment according to the length of the enciphered data of each data segment by deciphering module;
S203: judge whether data segment number is greater than 1, if so, performs step S205; Otherwise, perform step S204;
S204: data hop count is 1, according to the decipherment algorithm of this data segment, utilizes deciphering root key to be decrypted the enciphered data in data segment, exports the data after deciphering;
S205: according to the decipherment algorithm of the first deciphering order data section, utilizes the enciphered data of deciphering root key to the first deciphering order data section to be decrypted, obtains decrypted result;
S206: successively according to deciphering the decipherment algorithm deciphering the posterior data segment of order in two adjacent data segments of order, utilize the decrypted result of the preceding data segment of deciphering order to be decrypted the enciphered data in the posterior data segment of described deciphering order as decruption key, obtain the decrypted result of the posterior data segment of described deciphering order;
S207: judge whether all data segments complete deciphering all, if so, performs step S208; Otherwise, perform step S206;
S208: the decrypted result of each data segment is combined as the data after deciphering according to the precedence of each data segment in data to be decrypted.
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| CN106788982A (en) * | 2017-02-22 | 2017-05-31 | 郑州云海信息技术有限公司 | A kind of sectional encryption transmission method and device |
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| 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 |
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