synchronous key encryption
<algorithm, cryptography> Data encryption using two interlocking keys
where enything encoded using one key may be decoded using the other key. This
means if someone makes one of the two keys publicly available (as in public-key
encryption) and keeps the other private, then anyone may send them a message or
data that only they can decode, giving privacy, and furthermore, the sender may
also encrypt that same message additionally with their own private key, making
it impossible to read without decoding first with *their* _public_ key by the
receiver, this gives authenticity.
It is a very powerful system. One cannot determine one key from the other, nor
can they crack the encryption by computing all combinations, because, depending
on the size of the keys (sometimes as large as 1024 bytes, though having grown
from smaller versions in popular implementations of the software which does
this), the amount of computing power required to crack the code is unavailable,
even supercomputers would take more than a hundred years to crack it.
PGP is a publicly availble software implementation written by Phil Zimmermann.
(1994-10-10)
Nearby terms:
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synchronous key encryption » Synchronous Optical
NETwork » syncronous » synflood
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