Organization use e-mails as major tools for communication. While delivering emails, we
expect they reach to recipients in unaltered form. But before reaching the destination,
attackers may intercept and read emails and message. This may lead to data leakage. The
consequence of data leakage may be huge loss of assets and reputation of organization. To
protect organization from those incidents, organization search different ways to protect their
emails. There are many methods organizations use to protect and label their confidential e-
mails (Kaur, 1).
Methods used to protect Confidential emails
Email protection by Gateway- Here, gateway computer plays a vital role in
controlling emails that flows from one network to another network. E-mails that are
ready to send outside of the network, first passes through gateway computer. If
nothing malicious is found, email is given permission to leave (Kaur, 1).
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Block an email- Blocking an email means stopping an email from going. To allow
outgoing mails to pass, scanning and matching keywords processes must be done.
After scanning, administrator matches two keywords of outgoing mails and stored
database to detect malicious activities. If something malicious is found, administrator
has right to block emails (Kaur, 1).
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Use of symmetric and asymmetric cryptographic algorithms- Cryptography is a
technique that allows only sender and recipient to view the content. Symmetric
cryptographic algorithm is followed by encryption of information. That encrypted
information is transmitted through a computer network so that unauthorized person
cannot view or read the content of information during interception of packets. On the
other hand, asymmetric cryptographic ensures authentication of users in the system
using PKI infrastructure and electronic certificates, public and private keys, RSA
