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<concept id="GUID-2861F3D9-875E-5AB3-9600-B328F042CC38" xml:lang="en"><title>MakeKeys

Overview</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>The <xref href="GUID-557BF1DA-B6E8-521B-89F0-15C84E3BCB1A.dita">MakeKeys</xref> tool

is a PC-side command-line tool that enables Symbian application developers

to create a private key-public key pair and generate certificate requests. </p>

<section><title>Purpose</title><p>The MakeKeys tool can be used to create

a private key-public key (in form of a self-signed certificate) pair. The

private key can then be used by the <xref href="GUID-B20EE8A3-D7B2-5872-AF43-001A88C1A46E.dita">SignSIS</xref> tool

to digitally sign an installation file. The self-signed certificate can be

used by the MakeKeys tool to create a certificate request file, which can

then be submitted to a Certification Authority (CA) for signing. </p><note>The

MakeKeys tool cannot generate Certification Authority (CA) certificates.</note> </section>

<section><title>Key concepts and terms</title> <dl>

<dlentry>

<dt>Key</dt>

<dd><p>A key is a constant value applied using a cryptographic algorithm to

encrypt text or to decrypt encrypted text. </p> <p>Keys are classified as

symmetric and asymmetric based on the type of algorithm applied. If the same

key is used for both encryption and decryption, it is symmetric. If different

keys are used for encryption and decryption, they are asymmetric. Asymmetric

keys exist in the form of a private key-public key pair, where the public

key is used for encryption and the private key is used for decryption. For

more information, see <xref href="GUID-FB2CAA46-8EBB-5F76-847C-F3B953C9D31C.dita">Public

Key Cryptography</xref>. </p> </dd>

</dlentry>

</dl> <dl>

<dlentry>

<dt>Certification Authority</dt>

<dd><p>Certification Authority (CAs) is a trusted third party that provides

root certificates to users (End Entities). For details, see <xref href="GUID-911E9F7E-D0AD-55EC-A3F4-1D427F803780.dita">Certificates</xref>. </p> </dd>

</dlentry>

</dl> <dl>

<dlentry>

<dt>Digital signature</dt>

<dd><p>A digital signature is used to verify that a message (or data) actually

came from the sender (the one who signed the message) and that it has not

been tampered with. For details, see <xref href="GUID-5C58F7D1-D672-5B6D-AD48-863EC68F7446.dita">Digital

Signatures</xref>. </p> </dd>

</dlentry>

</dl> </section>

</conbody><related-links>

<link href="GUID-D45A4AE9-4169-4466-B02B-629B15C3E9AA.dita"><linktext>MakeKeys

Tutorials</linktext></link>

<link href="GUID-557BF1DA-B6E8-521B-89F0-15C84E3BCB1A.dita"><linktext>MakeKeys

Reference</linktext></link>