Email Security

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Email Encryption
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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

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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.

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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

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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

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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.

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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-

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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.

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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.

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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.

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Some Interesting!!
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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.

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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.

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The Best Free Ways to Send Encrypted Email and
Secure Messages

• Infoencrypt
• SafeGmail
• RMail
• Sendinc
• Hushmail
• Lockbin
• iSafeguard
• Sbwave Enkryptor
• Safe-mail.net

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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

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Thanks!!!