Email Encryption - PowerPoint PPT Presentation

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Email Encryption

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Title: Email Encryption


1
Email Encryption
2
Contents
  • Definition
  • What does Email Encryption mean?
  • Email Encryption What to Encrypt
  • What Email Encryption Does
  • What Is PGP?
  • How PGP works?
  • The Best Free Ways to Send Encrypted Email and
    Secure Messages

3
Definition
  • Email encryption involves encrypting, or
    disguising, the content of email messages in
    order to protect potentially sensitive
    information from being read by anyone other than
    intended recipients. Email encryption often
    includes authentication.

4
What does Email Encryption mean?
  • Email encryption refers to an encryption and
    authentication mechanism of an email message to
    prevent the contents from being read by an
    unauthorized recipient. Email encryption
    methodology largely depends on public key
    cryptography wherein users publish a public key
    that can be used by others to encrypt messages.
    All this while keeping a secret private key to
    decrypt messages or to sign and digitally encrypt
    messages they send

5
Email Encryption What to Encrypt
  • three primary things you should encrypt
  • The connection from your email provider
  • Your actual email messages
  • Your stored, cached, or archived email messages

6
1. The connection from your email provider
  • Encrypting the connection prevents unauthorized
    users on the network from intercepting and
    capturing your login credentials and any email
    messages you send or receive as they leave your
    email providers server and travel from server to
    server around the Internet.

7
How to Encrypt Email Connections
  • To secure the connection between your email
    provider and your computer or other device, you
    need to set up Secure Socket Layer (SSL) and
    Transport Layer Security (TLS) encryption-

8
2. Your actual email messages
  • Encrypting email messages before theyre sent
    means that even if a hacker or anyone other than
    the intended recipient should intercept your
    email messages, theyre unreadable, and
    essentially useless.

9
3. Your stored, cached, or archived email
messages
  • Finally, if you store backed-up email messages in
    an email client, such as Microsoft Outlook,
    hackers may gain access despite password
    protection of your accounts and even your device.
    Email encryption ensures that even if access is
    obtained, the content of your email messages is
    unreadable.

10
What Email Encryption Does
  • Email encryption relies on a Public Key
    Infrastructure or PKI
  • in most cases, a combination of a private key
    (known only by you) and a public key (known only
    to those you choose to distribute it to or even
    made publicly available).
  • Those sending emails that they want to encrypt
    would use the public key, while the intended
    recipient would use the private key to decrypt
    those messages into a readable format.
  • In the PKI model, anyone can use a public key to
    encrypt email, but each encrypted message can
    only be decrypted by a unique private key.

11
Some Interesting!!
12
What Is PGP?
  • PGP stands for Pretty Good Privacy, and its
    most often used for sending encrypted messages
    between two people. PGP works by encrypting a
    message using a public key thats tied to a
    specific user when that user receives the
    message, they use a private key thats known only
    to them to decrypt it.

13
How PGP works
  • PGP combines some of the best features of both
    conventional and public key cryptography
  • When a user encrypts plaintext with PGP, PGP
    first compresses the plaintext. Data compression
    saves modem transmission time and disk space and,
    more importantly, strengthens cryptographic
    security.
  • Pretty Good Privacy uses a variation of
    the public key system. In this system, each user
    has an encryption key that is publicly known and
    a private key that is known only to that user.
  • You encrypt a message you send to someone else
    using their public key. When they receive it,
    they decrypt it using their private key.
  • Since encrypting an entire message can be
    time-consuming, PGP uses a faster
    encryption algorithm to encrypt the message and
    then uses the public key to encrypt the shorter
    key that was used to encrypt the entire message.
    Both the encrypted message and the short key are
    sent to the receiver who first uses the
    receiver's private key to decrypt the short key
    and then uses that key to decrypt the message.

14
(No Transcript)
15
The Best Free Ways to Send Encrypted Email and
Secure Messages
  • Infoencrypt
  • SafeGmail
  • RMail
  • Sendinc
  • Hushmail
  • Lockbin
  • iSafeguard
  • Sbwave Enkryptor
  • Safe-mail.net

16
Reference
  • http//www.howtogeek.com/135638/the-best-free-ways
    -to-send-encrypted-email-and-secure-messages/
  • http//www.pcworld.com/article/254338/how_to_encry
    pt_your_email.html

17
Thanks!!!
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