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{div:style=
Div
Wiki Markup
style
float:right;margin-left:1em;margin-bottom:1ex;width:30%
}{
Panel
:
title
=
SHA-1
is
not
an
encryption
algorithm
}

Encryption

implies

the

ability

to

decrypt

(i.e.,

 encryption

 encryption by

definition

is

reversible)

but

[SHA-1|https://en.wikipedia.org/wiki/

SHA-1

]

and

[

SHA-256

|https://en.wikipedia.org/wiki/SHA-2]

are

_

one-way

hash

functions

_

.

A

hash

function

by

definition

is

*

not

*

reversible.

So

neither

SHA-1

nor

SHA-256

are

encryption

algorithms.

{panel}{div}

SHA-1 and X.509 Certificates

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