| author | Santosh V Patil <santosh.v.patil@nokia.com> |
| Fri, 13 Nov 2009 15:59:20 +0530 | |
| branch | RCL_1 |
| changeset 22 | 1440dc310db1 |
| parent 0 | 2c201484c85f |
| child 8 | 35751d3474b7 |
| permissions | -rw-r--r-- |
|
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
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/** |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
2 |
@page Security_signatures Digital signatures |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
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A digital signature is used to verify that a message (or data) actually came from the sender (the one who signed the |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
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message) and that it has not been tampered with. |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
7 |
A signature is formed by producing a fixed-length digest (@ref hash) of the message using a hash algorithm, which is then |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
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encrypted using the sender's private key. This signature and the message are then sent to the recipient. |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
9 |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
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The receiver can then verify the signature as follows: a @ref hash is produced of the sender's message (using the hashing |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
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algorithm sent with the signature); also, using the sender's public key, their signature is decrypted into a @ref hash. |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
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These two hashes are compared: if they are the same, it is more or less certain that the public key used for the |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
13 |
@ref decryption corresponds to the private key used to create the signature, thus data integrity is validated. |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
15 |
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2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
diff
changeset
|
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*/ |