DESIGN AND IMPLEMENTATION OF DATA ENCRYPTION SOFTWARE
- 1. DESIGN AND IMPLEMENTATION OF DATA ENCRYPTION SOFTWARE Presented By AYANDA DEMILADE ISAAC B.Sc.inComputerScience Supervisor: Mrs T.TSalau
- 2. Background of Study • Data has historically been used primarily to protect mission critical data, government records and has been used increasingly over many years by financial industry to protect money transfers; by business to protect credit card information for electronic commerce, and by corporation to secure sensitive transmission of proprietary information. (Oaks, 2000) • Also, the use of encryption/decryption is as old as the art of communication.
- 3. • In wartime, a cipher, often incorrectly called a "code," can be employed to keep the enemy from obtaining the contents of transmissions. (Technically, a code is a means of representing a signal without the intent of keeping it secret; examples are Morse code and ASCII.) Simple ciphers include the substitution of letters for numbers, the rotation of letters in the alphabet, and the "scrambling" of voice signals by inverting the sideband frequencies. (Java Security, 2001)
- 4. Statement of Problem • There is need for protection and security which include system protection against hardware or software malfunction (or crashes) and security protection against unauthorized or malicious access. This requires some data not available to other user. However, the structure of data files is embedded in the application programs, so any changes to the structure of a file may require changing all programs that access that file.
- 5. Aims & Objectives The aim of this dissertation is to compare three encryption techniques which are Data Encryption Standard (DES),. and Rijndael and see which is more efficient. The objectives are: • To consider their similarity functions and differences. • To provide a system based on the Rijndael Algorithm.
- 6. Literature Review Author Works Limitations AES (Uli Kretzschmar., 2009) The elegance and efficiency of the system makes it suitable for either hardware or software systems. Not safe because of its short key with a length of only 56 bits. IBM The algorithm encrypts a 64-bit plaintext using a 56- bit key. It has now become increasingly feasible to break a DES-encrypted ciphertext. Rijndael RSA (Ronald Rivest, Adi Shamir and Leonard Adleman) Data is encrypted one block at a time and is decrypted with a different key. RSA is embedded in many popular software products E.g Windows, Netscape, Navigator. RSA is much slower than RC4 and RC2
- 7. Literature Review Author Works Limitation Data Encryption Standard (DES) in 1972 NBS (National Bureau of Standards) Encrypting unclassified and sensitive information. A shortened key length & were much more resistant to the attack and slow operation TDES (TripleDES) by Shantanu Bhadoria It implemented to store data in addition to the initial use of encrypting data in transit. Run 3 times slower than DES Blowfish Ciper (Bruce Schneier 1993) It provides a good encryption rate in software. Key limited to 256 bits
- 8. Research Methodology • A comparative analysis is staged by critically observing the responsive technique between the RC4, Triple DES technique and AES using Rijndael as the Secret-Key encryption system. • The following factors are considered to benchmark the performance of each techniques based on vulnerabilities and reconnaissance i.e. loopholes and fast hash-key: • Structure • Key length
- 9. Research Methodology • Block length • Operations • Security • Implementation • Similarity • Cipher type • Cryptanalysis resistance and possible keys.
- 10. Result Figure 1 Showing a plain text
- 11. Result Figure 2 Showing a Cipher
- 12. Conclusion • It has presented a new comparative analysis in this study between Data Encryption Algorithm of the Data Encryption Standard, and Rijndael algorithm of the new Advanced Encryption Standard (AES) in factors. These factors are Rijndael is more efficient than DEA and is yet to be rendered “broken”.
- 13. Conclusion • The program can be incorporated in a networked system which will have a central database e.g. SQL Server or Oracle Server. This program will help to retrieval files especially text with secret key before and after access.
- 14. FUTURE WORK • It is hereby recommended that a further research for comparative analysis is fostered in order to benchmark performance evaluations other techniques using media data such videos, audio etc. Rijndael is suitable and economical for cryptal-analysis, it is utmost necessary a continuous research spans across its (Rijndael) applicability.
- 15. THANK YOU
- 16. QUESTIONS??