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Electronic signature
software solutions,
it refers to any of several, not necessarily
cryptographic, mechanisms for identifying the originator of
an electronic message.
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Electronic
signature software solutions,
There are three common
reasons for applying a
digital signature to
communications:
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Authenticity,
Electronic signature software solutions.
Public-key cryptosystems allow anybody to
send a message using the public key. A signature allows the recipient
of a message to be confident that the sender is indeed who s/he claims
to be.
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Integrity,
Both parties will always wish to be confident that a message has not
been altered during transmission. The encryption makes it difficult
for a third party to read a message, but that third party may still be
able to alter it in a useful way.
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Non-repudiation,
In a cryptographic context,
the word repudiation refers to the act of denying association with a
message (ie claiming it was sent by a third party). The recipient of a
message may insist that the sender
attach a
signature in order to prevent any later repudiation, since the
recipient may show the message to a third party to prove its origin.
-Electronic signature software solutions.
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Electronic signature
software solutions
implementation
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Electronic signature software solutions schemes rely on
public-key cryptography. In public-key cryptography, each user has a
pair of keys: one public and one private. The public key is distributed
freely, but the private key is kept secret and confidential; another
requirement is that it should be infeasible to derive the private key
from the public key. A general
digital signature scheme consists of three algorithms:
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