CN106375083B - A kind of encipher-decipher method and its device based on Base64 - Google Patents
A kind of encipher-decipher method and its device based on Base64 Download PDFInfo
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- CN106375083B CN106375083B CN201610879276.0A CN201610879276A CN106375083B CN 106375083 B CN106375083 B CN 106375083B CN 201610879276 A CN201610879276 A CN 201610879276A CN 106375083 B CN106375083 B CN 106375083B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
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Abstract
The invention discloses a kind of encipher-decipher method and its device based on Base64, this method comprises: obtaining cleartext information to be encrypted；Cleartext information is subjected to Base64 coding and generates coded string；The first numerical value m1 between a 3-63 is generated at random；The first character corresponding with the first numerical value is obtained from Base64 character map；M1 character is obtained at random from Base64 character map, and forms the first character string；First character string is added to before coded string, the first character is added to behind coded string, generates final encrypted characters string.The advantage of the invention is that technically further encrypting to cleartext information based on Base64 coding, is not available other decipherment algorithms and cracks, safety is higher.
Description
Technical field
The present invention relates to data security arts more particularly to a kind of encipher-decipher methods and its device based on Base64.
Background technique
Base64 is a kind of relatively conventional data coding mode, can be the data conversion of non-ascii character at ASCII
Character, coding rate need to use fastly in many occasions, such as transmitting certificate, e-mail data, the transmission of Http data.
Base64 is encoded due to having unreadable property, the encryption and decryption applied to data security arts；But since its coding principle is to granddad
It opens, decoding tool is very common, so usually only being encoded with Base64, then cooperate with other in real data security application
Encryption and decryption means, such as DES, AES seldom individually carry out encryption and decryption with it, are easy to be trapped in transmission.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide a kind of encipher-decipher methods based on Base64
And its device, capable of making Base64 encoding and decoding, the safety is improved.
The present invention provides a kind of encryption methods based on Base64, specifically include:
Obtain cleartext information to be encrypted；
Cleartext information is subjected to Base64 coding and generates coded string；
The first numerical value m1 between a 3-63 is generated at random；
The first character corresponding with the first numerical value is obtained from Base64 character map；
M1 character is obtained at random from Base64 character map, and forms the first character string；
First character string is added to before coded string, the first character is added to behind coded string, it is raw
At final encrypted characters string.
The present invention provides a kind of encryption methods based on Base64, specifically include:
Obtain cleartext information to be encrypted；Cleartext information is subjected to Base64 coding and generates coded string；
The random number between two 3-63: the first numerical value m1 and second value m2 is generated at random；
The first character corresponding with the first numerical value is obtained from Base64 character map, and is obtained and second value pair
The second character answered；
M1 character is obtained at random from Base64 character map, and forms the first character string；And random acquisition m2
Character, and form the second character string；
First character string is added to before coded string, after the second character string is added to coded string
Face, and the first character and the second character are successively added to behind the second character string, generate final encrypted characters string.It adopts
It is respectively added to the front and back of coded string with two random numbers, and two character strings of generation, encryption method can be made
Safety is higher.
The present invention provides a kind of decryption methods based on Base64, specifically include:
Encrypted characters string is obtained, and obtains last character d1 of encrypted characters string；
According to Base64 character map, numerical value n1 corresponding with character d1 is obtained；
Preceding n1 of encrypted characters string and last position are deleted, coded string is obtained；
Base64 is carried out to coded string to decode to obtain cleartext information.
The present invention provides a kind of decryption methods based on Base64, specifically include:
Encrypted characters string is obtained, and obtains last two characters d1 and d2 of encrypted characters string；
According to Base64 character map, numerical value n1 and n2 corresponding with character d1 and character d2 is obtained respectively；
By preceding n1 deletions of encrypted characters string, and by rear n2+2 deletions of encrypted characters string, obtain code character
String；
Base64 is carried out to coded string to decode to obtain cleartext information.
The present invention provides a kind of encryption devices based on Base64, specifically include:
Coding module, for obtaining cleartext information to be encrypted；Cleartext information is subjected to Base64 coding and generates coded word
Symbol string；
First randomized blocks, for generating the first numerical value m1 between a 3-63 at random；
First generation module, for obtaining the first character corresponding with the first numerical value from Base64 character map；
Second randomized blocks for obtaining m1 character at random from Base64 character map, and form the first character string；
First character is added to by the second generation module for the first character string to be added to before coded string
Behind coded string, final encrypted characters string is generated.
The present invention provides a kind of encryption devices based on Base64, specifically include:
Coding module, for obtaining cleartext information to be encrypted；Cleartext information is subjected to Base64 coding and generates coded word
Symbol string；
First randomized blocks, for generating the random number between two 3-63: the first numerical value m1 and second value at random
m2；
First generation module, for obtaining the first character corresponding with the first numerical value from Base64 character map, with
And obtain the second character corresponding with second value；
Second randomized blocks for obtaining m1 character at random from Base64 character map, and form the first character string；
And m2 character is obtained at random, and form the second character string；
Second generation module adds the second character string for the first character string to be added to before coded string
Successively it is added to behind the second character string to behind coded string, and by the first character and the second character, generates most
Whole encrypted characters string.
The present invention provides a kind of decryption device based on Base64, specifically includes:
First obtains module, for obtaining encrypted characters string, and obtains last character d1 of encrypted characters string；
Second obtains module, for obtaining numerical value n1 corresponding with character d1 according to Base64 character map；
Removing module, for obtaining coded string for preceding n1 of encrypted characters string and the deletion of last position；
Decoder module decodes to obtain cleartext information for carrying out Base64 to coded string.
The present invention provides a kind of decryption device based on Base64, specifically includes:
First obtain module, for obtaining encrypted characters string, and obtain encrypted characters string last two character d1 and
d2；
Second obtains module, for obtaining the numerical value n1 of character d1 and character d2 respectively according to Base64 character map
And n2；
Removing module, for being deleted by preceding n1 deletions of encrypted characters string, and by rear n2+2 of encrypted characters string,
Obtain coded string；
Decoder module decodes to obtain cleartext information for carrying out Base64 to coded string.
Compared with prior art, the beneficial effects of the present invention are: based on Base64 coding technically further in plain text
Information is encrypted, and is not available other decipherment algorithms and is cracked, safety is higher.
Detailed description of the invention
Fig. 1 is the flow chart of the encryption method of the invention based on Base64；
Fig. 2 is the module connection figure of the encryption device of the invention based on Base64；
Fig. 3 is the flow chart of the decryption method of the invention based on Base64；
Fig. 4 is the module connection figure of the decryption method of the invention based on Base64.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention:
A kind of encryption method based on Base64, embodiment one:
As shown in Figure 1, including the following steps:
Step 01 obtains cleartext information to be encrypted, and cleartext information is carried out Base64 coding and generates coded string A.
Step 02, the at random random number between two 3-63 of generation: the first numerical value m1 and second value m2.
Step 03 obtains first character c1 corresponding with m1 from Base64 character map, and obtains corresponding with m2
The second character c2；Base64 character map is as shown in table 1.
Table 1, Base64 character map
Step 04 obtains m1 character at random from Base64 character map, and forms the first character string str1；And from
Base64 character map obtains m2 character, and the second character string of coded string str2 at random.
First character string str1 is added to before coded string by step 05, and the second character string str2 is added to
Behind coded string, and c1 and c2 is successively added to behind the second character string str2, generates final encrypted word
Symbol string B, encrypted characters string B includes: str1+A+str2+c1+c2.
For example, it is " 5p+/5a2Q " that cleartext information, which is the coded string A that " persimmon " carries out Base64 coding generation,；
The the first numerical value m1 generated at random is 7, and first character c1 corresponding with 7 is H from Base64 character map.With
The second value m2 that machine generates is 4；Then second character c2 corresponding with 4 is E from Base64 character map；
Obtaining m1 character at random from Base64 character map is respectively " S ", " h ", " i ", " n ", " g ", " 0 " and " 2 ",
Forming the first character string str1 is " Shing02 "；From Base64 character map obtain at random m2 character be respectively " S ",
" x ", " y " and "+", the second character string str2 of composition are " Sxy+ "；
Therefore final character string B is " Shing025p+/5a2QSxy+HE ".
A kind of encryption device based on Base64, as shown in Figure 2, comprising:
Cleartext information is carried out Base64 coding and generates coded word by coding module for obtaining cleartext information to be encrypted
Symbol string A；
First randomized blocks, for generating the random number between two 3-63: the first numerical value m1 and second value at random
m2。
First generation module for the acquisition first character c1 corresponding with m1 from Base64 character map, and obtains
Take second character c2 corresponding with m2；
Second randomized blocks for obtaining m1 character at random from Base64 character map, and form the first character string
str1；And m2 character, and the second character string of coded string str2 are obtained at random from Base64 character map.
Second generation module, for the first character string str1 to be added to before coded string, by the second character string
Str2 is added to behind coded string, and c1 and c2 are added to behind coded string, generates final encryption
Character string B, encrypted characters string B includes: str1+A+str2+c1+c2.
A kind of decryption method based on Base64, as shown in figure 3, including the following steps:
Step 11 obtains encrypted characters string B, and obtains last two the characters d1 and d2 of B；
Step 12, according to Base64 character map, obtain numerical value n1 and n2 corresponding with character d1 and character d2 respectively；
Step 13, the preceding n1 deletions by encrypted characters string B, and rear n2+2 of B are deleted；Obtain coded string
A；
Step 14 decodes to obtain cleartext information to coded string A progress Base64.
For example, obtain encrypted characters string B " Shing025p+/5a2QSxy+HE ", obtain B last two character d1 and
D2 is respectively " H " and " E "；According to Base64 character map, numerical value n1 and n2 points of character " H " and character " E " are obtained respectively
It Wei 7 and 4.Therefore preceding 7 " Shing02 " of encrypted characters string B " Shing025p+/5a2QSxy+HE " are deleted and 6 latter
" Sxy+HE " is deleted, and obtaining coded string A is " 5p+/5a2Q "；Base64 solution is carried out to coded string A " 5p+/5a2Q "
It is " persimmon " that code, which obtains cleartext information,.
A kind of decryption device based on Base64, as shown in Figure 4, comprising:
First obtains module, for obtaining encrypted characters string B, and obtains last two the characters d1 and d2 of B.
Second obtains module, for obtaining the numerical value n1 of character d1 and character d2 respectively according to Base64 character map
And n2.
Removing module, for being deleted by the preceding n1 deletions of encrypted characters string B, and by rear n2+2 of B；Obtain coding
Character string A.
Decoder module decodes to obtain cleartext information for carrying out Base64 to coded string A.
Embodiment two:
A kind of encryption method based on Base64, includes the following steps:
Step 21 obtains cleartext information to be encrypted；Cleartext information is subjected to Base64 coding and generates coded string A；
Step 22, at random the first numerical value m1 between one 3-63 of generation；
Step 23 obtains first character c1 corresponding with the first numerical value m1 from Base64 character map；
Step 24 obtains m1 character at random from Base64 character map, and forms the first character string str1；
First character string str1 is added to before coded string A by step 25, and the first character is added to coded word
Behind symbol string A, final encrypted characters string B is generated.
A kind of encryption device based on Base64, specifically includes:
Coding module, for obtaining cleartext information to be encrypted；Cleartext information is subjected to Base64 coding and generates coded word
Symbol string；
First randomized blocks, for generating the first numerical value m1 between a 3-63 at random；
First generation module, for obtaining the first character corresponding with the first numerical value from Base64 character map；
Second randomized blocks for obtaining m1 character at random from Base64 character map, and form the first character string；
First character is added to by the second generation module for the first character string to be added to before coded string
Behind coded string, final encrypted characters string is generated.
A kind of decryption method based on Base64, specifically comprises the following steps:
Step 31 obtains encrypted characters string B, and obtains last the character d1 of encrypted characters string B；
Step 32, according to Base64 character map, obtain numerical value n1 corresponding with character d1；Step 33, by encrypted word
Preceding n1 deletions of symbol string, obtain coded string；
Step 34 decodes to obtain cleartext information to coded string progress Base64.
A kind of decryption device based on Base64, specifically includes:
First obtains module, for obtaining encrypted characters string, and obtains last character d1 of encrypted characters string；
Second obtains module, for obtaining numerical value n1 corresponding with character d1 according to Base64 character map；
Removing module, for obtaining coded string for preceding n1 deletions of encrypted characters string；
Decoder module decodes to obtain cleartext information for carrying out Base64 to coded string.
It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas
Corresponding change and deformation, and all these changes and deformation all should belong to the protection scope of the claims in the present invention
Within.
Claims (8)
1. a kind of encryption method based on Base64 characterized by comprising
Obtain cleartext information to be encrypted；
Cleartext information is subjected to Base64 coding and generates coded string；
The first numerical value m1 between a 3-63 is generated at random；
The first character corresponding with the first numerical value is obtained from Base64 character map；
M1 character is obtained at random from Base64 character map, and forms the first character string；
First character string is added to before coded string, the first character is added to behind coded string, is generated most
Whole encrypted characters string.
2. a kind of encryption method based on Base64 characterized by comprising
Obtain cleartext information to be encrypted；Cleartext information is subjected to Base64 coding and generates coded string；
The random number between two 3-63: the first numerical value m1 and second value m2 is generated at random；
The first character corresponding with the first numerical value is obtained from Base64 character map, and is obtained corresponding with second value
Second character；
M1 character is obtained at random from Base64 character map, and forms the first character string；
And m2 character is obtained at random, and form the second character string；
First character string is added to before coded string, the second character string is added to behind coded string, with
And the first character and the second character are successively added to behind the second character string, generate final encrypted characters string.
3. a kind of decryption method based on Base64 characterized by comprising
Encrypted characters string is obtained, and obtains last character d1 of encrypted characters string；
According to Base64 character map, numerical value n1 corresponding with character d1 is obtained；
Preceding n1 of encrypted characters string and last position are deleted, coded string is obtained；
Base64 is carried out to coded string to decode to obtain cleartext information.
4. a kind of decryption method based on Base64 characterized by comprising
Encrypted characters string is obtained, and obtains last two characters d1 and d2 of encrypted characters string；
According to Base64 character map, numerical value n1 and n2 corresponding with character d1 and character d2 is obtained respectively；
By preceding n1 deletions of encrypted characters string, and by rear n2+2 deletions of encrypted characters string, obtain coded string；
Base64 is carried out to coded string to decode to obtain cleartext information.
5. a kind of encryption device based on Base64 characterized by comprising
Coding module, for obtaining cleartext information to be encrypted；Cleartext information is subjected to Base64 coding and generates coded string；
First randomized blocks, for generating the first numerical value m1 between a 3-63 at random；
First generation module, for obtaining the first character corresponding with the first numerical value from Base64 character map；
Second randomized blocks for obtaining m1 character at random from Base64 character map, and form the first character string；
First character is added to coding for the first character string to be added to before coded string by the second generation module
Behind character string, final encrypted characters string is generated.
6. a kind of encryption device based on Base64 characterized by comprising
Coding module, for obtaining cleartext information to be encrypted；Cleartext information is subjected to Base64 coding and generates coded string；
First randomized blocks, for generating the random number between two 3-63: the first numerical value m1 and second value m2 at random；
First generation module for acquisition the first character corresponding with the first numerical value from Base64 character map, and obtains
Take the second character corresponding with second value；
Second randomized blocks for obtaining m1 character at random from Base64 character map, and form the first character string；And
M2 character is obtained at random, and forms the second character string；
Second character string is added to volume for the first character string to be added to before coded string by the second generation module
Behind code character string, and the first character and the second character be successively added to behind the second character string, generated final
Encrypted characters string.
7. a kind of decryption device based on Base64 characterized by comprising
First obtains module, for obtaining encrypted characters string, and obtains last character d1 of encrypted characters string；
Second obtains module, for obtaining numerical value n1 corresponding with character d1 according to Base64 character map；
Removing module, for obtaining coded string for preceding n1 of encrypted characters string and the deletion of last position；
Decoder module decodes to obtain cleartext information for carrying out Base64 to coded string.
8. a kind of decryption device based on Base64 characterized by comprising
First obtains module, for obtaining encrypted characters string, and obtains last two characters d1 and d2 of encrypted characters string；
Second obtains module, for obtaining the numerical value n1 and n2 of character d1 and character d2 respectively according to Base64 character map；
Removing module is obtained for deleting by preceding n1 deletions of encrypted characters string, and by rear n2+2 of encrypted characters string
Coded string；
Decoder module decodes to obtain cleartext information for carrying out Base64 to coded string.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108155985A (en) * | 2017-06-29 | 2018-06-12 | 广东网金云计算有限公司 | A kind of encipher-decipher method, device and user terminal |
| CN108280356B (en) * | 2018-01-17 | 2020-07-14 | 吉浦斯信息咨询（深圳）有限公司 | File decryption method and device, processing terminal and computer readable storage medium |
| CN110401542A (en) * | 2019-08-05 | 2019-11-01 | 中国工商银行股份有限公司 | Electronic identity voucher generation method, terminal and server |
| CN110889017B (en) * | 2019-10-15 | 2022-09-13 | 福建联迪商用设备有限公司 | Retrieval method and terminal for information encrypted through base64 |
| CN113343269B (en) * | 2021-06-28 | 2022-09-13 | 迈普通信技术股份有限公司 | Encryption method and device |
| CN114827114A (en) * | 2022-04-22 | 2022-07-29 | 雷沃工程机械集团有限公司 | Method and system for realizing data twinning of engineering machinery Internet of vehicles platform |
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