TRANSPORT LAYER AND ITS SECURITY

1. TRANSPORT LAYER
SECURITY
B. SOUNDARYA M.SC (CS),
NADAR SARAWATHI
COLLEGE OF ARTS AND
SCIENCE, THENI.

2. WHAT IS TRANSPORT
LAYER SECURIY?
TLS is the successor to the
secure sockets layer.
Transport layer security is a
protocol that ensure privacy
between communicating
application and their users
on the internet.

3. WHY DO WE NEED IT?
TLS ensure that no
third party may eaves
drop or tamper with any
message.

4. BENEFITS OF TLS
Encryption
Algorithm flexibility
Inter operability
Ease of deployment

5. WORKING OF TRANSPORT
LAYER SECURITY
The client connect to server using
tcp, the client can be anything .
The client sends a number of
specifications ,
1) Version of ssl, tls.
2) Which cipher suites, compression
method it wants to use.

6. The server checks what the
highest ssl, tls variation it
that is supported by them
both, picks a cipher suits
form one of the clients
options and optionally picks a
compression methods.

7. HOW TO DETECT SECURE
CONNECTIONS
Chrome can display the version.
Click on the padlock icon a popup
appears, which contains some
details , including the protocol
version .
Example:
The connection uses tls 1.0”
verified on version 21.01180.82

8. EXAMPLES
The site identity is verified and is
secure.
Maharashtra.gov.in users
#ssl
# The certificate has been
verified by thawte ssl ca
# The key exchanging
mechanism.

9. TLS RECORD PROTOCOL
 Dividing outgoing messages into
manageable blocks, and
reassembling income messages.
 Compressing outgoing blocks and
decompressing income blocks.
 Applying a message authentication
code to outgoing message and
verifying incoming messages using
the Mac.

10.  Encrypting outgoing messages and
decrypting income messages.
 When the record protocol and
handshake protocols are completed,
the outgoing encrypted data is
passed down to the Transmission
control protocol layer for transport.

11. THANK
YOU !!!