Encryption
is simply the encoding of messages so that they cannot
be read by anyone who does not know how to decode
them.
How does Encryption work?
Encryption algorithms are based on the concept of
complex mathematics that work only in one direction
generally based on the difficulty of factoring very
large numbers (which are the product of large primes)
called keys that are used for encryption. For example,
anyone can multiply two large prime numbers to obtain
a result, but it is very difficult for someone else
to get back the two primes. This is to say that mathematicians
have yet to figure out a method for retrieving the
math effectively. In this way, cryptography has been
a secure method of ensuring data confidentiality over
computer networks.
How secure is Encryption?
A file that is encrypted with a strong encryption
algorithm, for example as used in the Cypherix
range of products (448 bit symmetrical algorithm),
would be statistically impregnable against brute force
attacks. It would take 1032 years for the
all the fastest computer in existence to break into
the file! To put this in perspective, the age of the
universe is approximately 1018 years.
Why Encrypt?
Every business possesses certain vital information-
a unique formula, specialised customer database, financial
data etc. The organisation would be quite disabled
if such data fell into the wrong hands.
Till a few years ago, protecting
such information was relatively easy. All one required
was a strong safe with a single key, and a trusted
employee to handle it. However, there is no privacy
of any kind in a PC. Encryption is the only way to
protect your privacy. Currently, save strong encryption,
there are no methods available to perform this absolutely
necessary and critical function.
Local methods such as passwords
within most programs (Word, Excel, Access etc.) can
be broken by mere novices without any computing knowledge,
given the plethora of password breaking programs available
on the Internet.