RSA algorithem

Course Title:
Communications and
Network Security
Course Code: ICE450
Course Instructor:
Mohammad Rafsun Islam
Lecturer, ECE Dept. ,EWU
2

Presented by
1.Jannatun Nayeem
ID:2015-2-50-013
2.MD. Jahirul Islam Rabbi
ID:2015-2-50-010
3.Taslima Yasmin Tarin
ID: 2015-2-50-022
3

Presentation Topic:
Security Algorithm(RSA)
4

What is RSA ?
Cryptosystem for public-
key encryption
Securing data
Convert information
5

Inventor of RSA :
It named after Rivest-Shamir-
Adleman
6

Background
1977: Public-key encryption is
developed
1982: Found RSA Data Security
1994: RSA code is published on
Internet
 1999: Parent adopts the RSA name
7

Distinction between DES
and RSA Algorithm’s
9

Social Impact
Secure Socket Layer (SSL)
• A public-key protocol
• Security layered
• Server authentication, message
integrity, client authentication
• Uses RSA public-key
cryptosystem
10

Authentication/Digital
signatures
• Pretty Good Privacy (PGP)
• Developed by Phil Zimmerman
• Provides encryption and
authentication
• Uses RSA for key transport
11

 Electronic money
• Electronic cash or digital
cash
• Transactions(debit or credit)
• Identity of the customer
• Blind signature schemes
12

 Anonymous remailers
• Carried out header
information
• Impossible to retrace
• The process
13

Practical Applications of the
RSAAlgorithm
 SSH (Secure Shell)
 SET protocol (Secure Electronic Transaction)
 Googles G Suite
 Digital data, info & telephone security
applications.

Advantages of RSA
 Fast encryption & verification
 Easier to implement than ECC
 Understand
 Widely deployed
 Safe and secure
 Hard to crack for factorization
 Easy to share the public key.

Disadvantages of RSA
 Slow key generation
 Slow decryption, tricky to
implement securely
 Two-part key is vulnerable to GCD
attack
 Slow for large data encrypted
 Verify the reliability of public
keys.
 Middlemen temper with the public
key system.

Conclusion
 DES is much faster than RSA. In software, DES is
generally at least 100 times as fast as RSA. coming
years, as there are growing commercial markets, but
DES will get faster as well.

RSA algorithem

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