encryption-decryption of email system using RSA encryption technique

1. ENCRYPTION DECRYPTION OF
EMAIL
By shashank singhal
Under supervision of Dr. Krishna Asawa

2. What is encryption?
 A process that converts original information, also
called plain text into a difficult-to-interpret form
called ciphertext.
 Done by using an encryption algorithm, a formula
used to turn plain text into ciphertext.
 Two types: Asymmetric and Symmetric

3. Asymmetric Encryption

4. Symmetric Encryption

5. Which one is better?
 Although, symmetric encryption is fast, it is not as
safe as asymmetric encryption because someone
could “steal” the key and decode the messages.
But because of its speed, it's commonly used for e-
commerce transactions.
 Asymmetric encryption is more complex--and more
secure. Asymmetric encryption's added safety
comes at a price: More computation is required, so
the process takes longer.

6. Who’s using encryption?
 If you use a computer and the internet, you’re
using encryption!
 Enables all organizations regardless of their size, to
be both user-and-IT friendly.

7. Why use encryption?
 Authentication
 Protects personal data such as passwords.
 Privacy
 Provides for confidentiality of private information.
 Accountability
 Prevents denial or plagiarism.
 Integrity
 Ensures that a document or file has not been altered.

8. How do you manage encryption?
 Make sure the encryption system has a complete
key management application.
 This will help manage and protect the data and keys,
and help you safely match encrypted data with the
right key.

9. Examples of Encryption
 Web browser encryption
 Email encryption
 Hard drive encryption
 Operating system protection

10. A few vendors and their product
coverage
 Blackberry
 System, software, hardware, and service.
 Global Technologies Group, Inc. (GTGI)
 Software and hardware.
 Hewlett-Packard Company
 System, software, hardware, and service.
 Intellect Security Ltd.
 Software

11. How prevalent is it?
 According to InformationWeek Research:
 Of 500 sites surveyed, two-thirds report using
encryption to protect company data.
 Of 500 companies surveyed, 43% use encryption on
both stored and transmitted data. More than three out
of five companies encrypt due to the threat of
outsiders intercepting sensitive data.
Continued…

12.  Of 28% of sites surveyed, government regulation
requires encryption of stored and transmitted data.
 For 38% of companies, the complexity of the
technology is an obstacle.
 Some businesses aren’t able to use the technology
because of the lack of skilled IT personnel and budget
limitations.

13. Want more???
 More on what encryption is…
 http://cplus.about.com/od/introductiontoprogramming/p/encryption.htm
 http://www.pcworld.com/article/id,15230/article.html
 http://www.encyclopedia.com/doc/1G1-144388099.html
 http://www.informationweek.com/news/showArticle.jhtml?articleID=650
7540
 http://security.homeoffice.gov.uk/ripa/encryption/types-of-encryption/
 http://www.itworld.com/nl/unix_sec/01242002/
 http://www.pcmag.com/encyclopedia_term/0,2542,t=encryption+algorit
hm&i=42595,00.asp
 More on vendors and more detailed products…
 http://securitypark.bitpipe.com/olist/Data-Encryption.html

14. Questions???