COMMUNICATION ENCRYPTION AND DECRYPTION METHOD, DEVICE AND SYSTEM

• US 20150244521A1
• Filed: 09/11/2013
• Published: 08/27/2015
• Est. Priority Date: 09/24/2012
• Status: Abandoned Application

• Current Assignee: Tencent Technology Company Limited (Tencent Holdings Limited)
• Original Assignee: Tencent Technology Company Limited (Tencent Holdings Limited)
• Inventors: Chen, Shusheng, Zhang, Kun, Xiong, Zhengxiang, Liu, Yingxue, Zang, Yue
• Application Number:
  US14/430,837
• Publication Number:
  US 20150244521A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 2209/34 Encoding or coding, e.g. Huffman coding or error correction
• CPC Class Codes: H04L 9/0618 Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
• CPC Class Codes: H04L 9/088 Usage controlling of secret information, e.g. techniques for restricting cryptographic keys to pre-authorized uses, different access levels, validity of crypto-period, different key- or password length, or different strong and weak cryptographic algorithms network architectures or network communication protocols for using time-dependent keys in a packet data network H04L63/068
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying

Abstract

An encryption process comprises: extracting a to-be-encrypted first character string from the to-be-transmitted information; converting the first character string into a plurality of first binary numbers for storage; encrypting the stored plurality of first binary numbers according to a preset encryption algorithm to generate a plurality of second binary numbers; converting the plurality of second binary numbers into a to-be-transmitted character string; conducting transmission encoding on the to-be-transmitted character string, and transmitting the encoding result. The decryption process comprises: receiving the to-be-processed information transmitted by a transmitting terminal; conducting transmission decoding on the to-be-processed information to obtain a third character string; converting the third character string into a plurality of third binary numbers for storage; decrypting the stored plurality of third binary numbers according to a preset decryption algorithm to generate a plurality of fourth binary numbers; and converting the plurality of fourth binary numbers into a fourth character string.

Claims

1. A method for communication encryption, comprising:

extracting a first character string that is to be encrypted from to-be-sent data;

converting the first character string into plural first binary digits, storing the plural first binary digits;

encrypting the stored plural first binary digits using a pre-defined encryption algorithm to generate plural second binary digits;

converting the plural second binary digits into a to-be-sent character string; and

applying transmission encoding to the to-be-sent character string and sending an encoded result;

wherein converting the to-be-encrypted first character string into the plural first binary digits and storing the plural first binary digits comprises;

converting the to-be-encrypted first character string into a second character string;

wherein each character in the second character string corresponds to one byte;

converting the second character string into a first character array;

wherein an element in the first character array corresponds to a single-byte encoded value of a character in the second character string;

assigning elements in the first character array into plural array blocks according to a pre-defined value;

wherein each array block includes elements whose number equals the pre-defined value; and

converting elements in each array block into 8-bit binary digits, and storing the 8-bit binary digits corresponding to each array block.

3. The method of claim 1, wherein when the pre-defined value is 4, the assigning single-byte encoded values corresponding to the elements in the first character array into the plural array blocks comprises:

assigning 4 successive elements into one array block in an order of the elements arranged in the first character array;

wherein the converting elements in each array block into 8-bit binary digits and storing the 8-bit binary digits corresponding to each array block comprise;

converting each of the 4 elements in each array block into an 8-bit binary digit, and combining the 4 8-bit binary digits corresponding to each array block into a 32-bit binary digit; and

storing the 32-bit binary digit corresponding to each array block.

4. The method of claim 1, wherein the converting the to-be-encrypted character string into the plural first binary digits and storing the plural first binary digits comprises:

converting each 8 successive binary digits in the plural second binary digits into a single-byte encoded value to generate a second character array; and

converting the second character array into the to-be-sent character string, wherein an element in the second character array corresponds to a single-byte encoded value of a character in the to-be-sent character string.

2. (canceled)

5. A method for communication decryption, comprising:

receiving to-be-processed data sent by a sending device;

applying transmission decoding to the to-be-processed data to obtain a first character string;

converting the first character string into plural first binary digits, storing the plural first binary digits;

decrypting the stored plural first binary digits using a pre-defined decryption algorithm to generate plural second binary digits; and

converting the plural second binary digits into a second character string;

wherein the converting the first character string into the plural first binary digits and storing the plural first binary digits comprise;

converting the to-be-decrypted first character string into a first character array, wherein an element in the first character array corresponds to a single-byte encoded value of a character in a third character string;

assigning elements in the first character array into plural array blocks according to a pre-defined value;

wherein each array block includes elements whose number equals the pre-defined value; and

converting elements in each array block into 8-bit binary digits, and storing the 8-bit binary digits corresponding to each array block.

8. The method of claim 5, wherein the converting the plural second binary digits into the second character string comprises:

converting each 8 successive binary digits in the plural second binary digits into a single-byte encoded value to generate a second character array; and

converting the second character array into a second character string, wherein an element in the second character array corresponds to a single-byte encoded value of a character in the second character string.

6. (canceled)

7. The method of claim 65, wherein when the pre-defined value is 4, the assigning single-byte encoded values corresponding to the elements in the first character array into the plural array blocks comprises:

assigning 4 successive elements into one array block in an order of the elements arranged in the first character array;

converting elements in each array block into 8-bit binary digits, and storing the 8-bit binary digits corresponding to each array block; and

converting each of the 4 elements in each array block into an 8-bit binary digit, and combining the 4 8-bit binary digits corresponding to each array block into a 32-bit binary digit; and

storing the 32-bit binary digit corresponding to each array block.

9. An apparatus for communication encryption, comprising:

a processor and a non-transitory memory, the memory comprising a set of computer-executable instructions causing the processor to carry out the steps of;

extracting a first character string that is to be encrypted from to-be-sent data;

converting the first character string into plural first binary digits and storing the plural first binary digits;

encrypting the stored plural first binary digits using a pre-defined encryption algorithm to generate plural second binary digits;

converting the plural second binary digits into a to-be-sent character string;

applying transmission encoding to the to-be-sent character string; and

sending a result of the encoding;

wherein the computer-executable instructions is further capable of causing the processor to carry out the steps of;

converting the to-be-encrypted first character string into a second character string;

wherein each character in the second character string corresponds to one byte;

converting the second character string into a first character array, wherein an element in the first character array corresponds to a single-byte encoded value of a character in the second character string;

assigning elements in the character array obtained by the second conversion module into plural array blocks, wherein each array block includes a pre-defined number of elements;

converting elements in each array block into 8-bit binary digits; and

storing multiple 8-bit binary digits corresponding to each array block.

11. The apparatus of claim 9, wherein the computer-executable instructions is further capable of causing the processor to carry out the steps of:

assigning 4 successive elements into an array block in an order of elements arranged in the first character array when the pre-defined value is 4;

converting each of the 4 elements in each array block into an 8-bit binary digit, and combining the 4 8-bit binary digits corresponding to each array block into a 32-bit binary digit; and

storing the 32-bit binary digit corresponding to each array block.

12. The apparatus of claim 9, wherein the computer-executable instructions is further capable of causing the processor to carry out the steps of:

converting each 8 successive binary digits in the plural second binary digits into a single-byte encoded value to generate a second character array; and

converting the second character array into a to-be-sent character string;

wherein an element in the second character array corresponds to a single-byte encoded value of a character in the to-be-sent character string.

10. (canceled)

13. An apparatus for communication decryption, comprising:

a processor and a non-transitory memory, the memory comprising a set of computer-executable instructions causing the processor to carry out the steps of;

receiving to-be-processed data sent by a sending device;

applying transmission decoding to the to-be-processed data to obtain a first character string;

converting the first character string into plural first binary digits, and storing the plural first binary digits;

decrypting the stored plural first binary digits using a pre-defined decryption algorithm to generate plural second binary digits;

converting the plural second binary digits into a second character string;

wherein the computer-executable instructions is further capable of causing the processor to carry out the steps of;

converting the to-be-decrypted first character string into a first character array;

wherein an element in the first character array corresponds to a single-byte encoded value of a character in a third character string;

assigning elements in the character array into plural array blocks, wherein each array block includes a pre-defined number of elements;

converting elements in each array block into 8-bit binary digits; and

storing the 8-bit binary digits corresponding to each array block.

15. The apparatus of claim 13, wherein the, computer-executable instructions is further capable of causing the processor to carry out the steps of:

assigning 4 successive elements into an array block in an order of elements arranged in the first character array when the pre-defined value is 4;

converting each of the 4 elements in each array block into an 8-bit binary digit, and combining the 4 8-bit binary digits corresponding to each array block into a 32-bit binary digit; and

storing the 32-bit binary digit corresponding to each array block.

16. The apparatus of claim 13, wherein the computer-executable instructions is further capable of causing the processor to carry out the steps of:

converting each 8 successive binary digits in the plural second binary digits into a single-byte encoded value to generate a second character array; and

converting the second character array into a second character string;

wherein an element in the second character array corresponds to a single-byte encoded value of a character in the second character string.

14. (canceled)

17. (canceled)