This document proposes an efficient Unicode cryptography algorithm for encrypting text, audio, and video files. It discusses how Unicode mapping (UTF-16) can be used to convert plain text into numeric values for encoding. The algorithm would use operators to encrypt the plain text Unicode values into ciphertext. By using the large Unicode character set and binding encryption keys in various ways, the proposed algorithm aims to increase cipher text complexity and provide better security for file encryption.

2. AN EFFICIENT OPERATOR BASED UNICODE
CRYPTOGRAPHY ALGORITHM FOR TEXT,
AUDIO AND VIDEO FILES

3. CRYPTOGRAPHY
 In modern times, science of using mathematics to
encrypt and decrypt data
 Examples: ATM Cards, Computer passwords,
E-Commerce

4. CONDITIONS TO BE SATISFIED
 Authentication: verifying the identity of user
 Privacy: only the intended user reads the message
 Integrity: the exact original message received by
user
 Non-repudiation: proving that the sender really sent
the message

5. CRYPTOGRAPHIC TECHNIQUES

6. OPERATORS IN ENCODING
 Every plain text can be converted into numeric
value irrespective of its magnitude.
Value 1
Value 2
Value X*
Plain
Text
Cipher
Text
Encoding

7. WHY UNICODE ?
 Common standard-65536 characters available
 100,000 code positions allocated to characters
 Many code points not yet assigned
 Many code points are permanent non characters
 Hence Unicode mapping (UTF 16) is chosen

8. DESIGN USING UNICODE
Plain
Text
Unicode
Cipher Text
Operator F(x)

9. KEY BINDING METHODS
 Numeric key is binded
 Entire Text Binding:
- Each character key added
- Inefficient method , hence avoided
 Feed Back Based Security:
- First character key added
- Loop continued till end of the word or input
- Current Char Key depends Previous Char
input
-No repetition

10.  Criteria for secret key:
- Must be numeric value
- Unique value range from 0 to 65536
 Serial Digit Secret Key:
- Depending on the operator , key is added to
block
- Key range is larger
 String Structure Key Bind:
-Series of characters instead of numbers
-Key can have Unicode equivalent values

11. CONCLUSION
 Thus Unicode character set provides better
encoding algorithm
 Hence it increases complexity of cipher text &
provides better security for all file types