Encryption and decryption
Data that can be read and understood without any special measures
is called plaintext or cleartext.
The method of disguising plaintext in such a way as to hide its substance
is called encryption.
Encrypting plaintext results in unreadable
gibberish called ciphertext.
You use encryption to ensure that information is hidden from anyone for whom it is not intended,
even those who can see the encrypted data.
The process of reverting ciphertext to its original plaintext is called decryption.
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Public key cryptography
Public key cryptography is an asymmetric scheme that uses a pair of keys for encryption:
a public key, which encrypts data, and a corresponding private, or secret key for decryption.
You publish your public key to the worldwhile keeping your private key secret.
Anyone with a copy of your public key can then encrypt information that only you can read.
Even people you have never met.
It is computationally infeasible to deduce the private key
from the public key.
Anyone who has a public key can encrypt information but cannot decrypt it.
Only the person who has the corresponding private key can decrypt the information.
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My PGP public key
Type Bits/KeyID Date User ID
pub 1024/BCE7E45D 1997/09/02 Stas A. Fomin
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: 2.6.3i
mQCNAzQMEYUAAAEEAN34//+YWBKklRFv+Bwc27kdv2QEhKpgTqeLNnXK+pGHENnG
Ka1Z+VbSlw4JpGZBgfGxd7Fz2y6n4TKDwStBMFtPqnxOx6zey59ZTaq7mH1NvEg4
5xnrtHuM4AbKayQaJloMSbIi6GQ/hGtCgTDChmW7QkUNB6gPXsih2iO85+RdAAUR
tB5TdGFzIEEuIEZvbWluIDxzdGFzQHNlcnZlci5ydT6JAJUDBRA0DBGFyKHaI7zn
5F0BAUAPBADHgh1+dFr8MRSbyF7SAkeAAp+aJ2PTjvQy8Eu8v+H5EAEOhz7HLOaP
mYO6CKse0q/V7vLt+3KUXByT0MkIQUIpbWntsZ0GF7WhGKe3SGn3yWFd2GPC1kUN
pJkM7q41H3VnSoKaL4bKJMsqiqX1Hoo+RZt609qvnLmyUxfi+NC78g==
=RRHy
-----END PGP PUBLIC KEY BLOCK-----
What is PGP?
PGP is the name of a program originally
written by Phil Zimmermann in 1991.
Later versions have been developed and distributed by MIT,
ViaCrypt, PGP Inc., and now Network Associates Inc. (NAI).
Over the past few years, PGP has got thousands of adherent supporters
all over the globe and has become a
de-facto standard (RFC 2440: Open PGP Message Format)
for encryption of email on the Internet.
How You can get it?
Here
you can download the latest freeware PGP version for your platform,
whether you want the international or the US variant.
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