Transport Layer Security (TLS) is a protocol that ensures privacy and security between communicating applications and users on the internet. It ensures that no third party can eavesdrop or tamper with messages by encrypting data and verifying the identities of communicating devices. The TLS handshake process involves a client connecting to a server, specifying security parameters, and the server selecting an encryption method and cryptographic keys to use. TLS provides benefits like encryption, flexibility in algorithms, interoperability between systems, and ease of deployment for applications.

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 !!!