TLS for Email: What Is It and How Can I Tell if an Email Has It? - PowerPoint PPT Presentation

About This Presentation
Title:

TLS for Email: What Is It and How Can I Tell if an Email Has It?

Description:

Transport Layer Security (TLS) is an encryption protocol used to protect email messages between sender and recipient, preventing eavesdroppers from reading your messages. – PowerPoint PPT presentation

Number of Views:16
Slides: 8
Provided by: rawatnimisha
Category:

less

Transcript and Presenter's Notes

Title: TLS for Email: What Is It and How Can I Tell if an Email Has It?


1
TLS for Email What Is It and How Can I Tell if
an Email Has It?
  • Transport Layer Security (TLS) is an encryption
    protocol used to protect email messages between
    sender and recipient, preventing eavesdroppers
    from reading your messages.
  • In this article, you will learn about Transport
    Layer Security (TLS), how it works, why you need
    it, and how to ensure your emails are correctly
    encrypted.

2
What Is TLS?
  • TLS is a common internet security protocol that
    is used to enable secure internet conversations
    that provide both privacy and data protection.
    TLS was created by the Internet Engineering Task
    Force (IETF), and its first version was released
    in 1999.TLS evolved from the Secure Sockets
    Layer, or SSL, encryption mechanism. Because the
    two protocols are so closely connected, you may
    hear people use the terms SSL and TLS
    interchangeably to describe secure internet
    interactions.
  • Secure connections are typically established
    using ports 587, 2525, and 465. These ports may
    differ depending on whether you use IMAP or POP3
    to access your server's emails. Your system
    administrator may also configure mail servers and
    other apps to use certain ports for encryption.

3
What Is STARTTLS?
  • The protocol instruction STARTTLS is used to
    notify an email server that the client intends to
    upgrade the connection from an unsecured to a
    secure one. 
  • STARTTLS can secure an unsafe connection using
    the TLS protocol. When you enable this option on
    your mail server, a secure connection is created
    before any emails are transmitted.

4
Role of TLS in Protecting Email exchanges
  • TLS contributes to the security of email
    exchanges by establishing a secure and encrypted
    connection between two sites. TLS employs
    asymmetric encryption to ensure that email
    conversations remain private and unaltered while
    in transit. Encrypting emails guarantees that the
    contents of the message cannot be read or
    modified while being delivered, and it also
    serves as a tool for authentication between the
    sender and the receiver.
  • Emails sent using SMTP without encryption are
    vulnerable to man-in-the-middle attacks or
    wiretaps. These attacks have the ability to
    quietly copy your emails and read their contents,
    as well as modify the contents of the message
    while en route. This not only jeopardizes the
    email's integrity but also exposes important
    information to attackers looking to conduct even
    more complex assaults against it.
  • A TLS handshake is a set of processes that are
    used to create secure connections. This handshake
    necessitates the participation of two people in
    order to establish a secure connection. The
    handshake procedure begins when a message is
    transmitted via TLS.

5
  • The client and server will indicate the version
    of TLS they will use for the session during the
    initial step of the handshake.
  • The client and server will choose the encryption
    suite to employ.
  • The server's identity will be verified using the
    server's TLS certificate.
  • Once the handshake is complete, session keys will
    be produced and used to encrypt the email
    communications.

6
Steps to Check TLS Implementation
  • Today about 90 of emails, both sent and
    received, are encrypted. But how can you know
    that for sure?
  • Server admins should be able to confirm that
    their email server is employing encryption by
    checking their certificate store and ensuring
    that their certificate is both appropriately
    installed and up-to-date.
  • If you're only checking an email, you may
    inspect the message's headers to see if it was
    transmitted using encryption. In Gmail, open the
    email in question and click on the tiny arrow
    next to your name beneath the sender's address.
  • In Microsoft Outlook, you can do this by opening
    the email you wish to verify and then navigating
    to File gt Properties. This will display the
    email header information, including any TLS
    information if it exists.

7
Is TLS Enough?
  • The simple answer is NO. TLS cannot protect
    emails against phishing attempts that use
    lookalike domains, malicious attachments that
    contain viruses, email links that redirect to
    phishing sites, social engineered emails that
    trick recipients into sharing sensitive
    information, and servers sending spoof emails
    from domains they do not control. 
  • So what else do you need? Us. 
  • Yes, you read that right. We, at EmailAuth,
    provide Email security solutions including DMARC
    checker, DKIM checker, SPF checker, and other
    email authentication services. DMARC for your
    emails ensures that your emails are sent from
    verified domains that cannot be spoofed or
    phished. Get DMARC here today!
Write a Comment
User Comments (0)
About PowerShow.com