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   <div class="section" id="introduction">
 <h1>Introduction</h1>
 <p>Arm’s Platform Security Architecture (PSA) is a holistic set of threat models,
 security analyses, hardware and firmware architecture specifications, an
 open source firmware reference implementation, and an independent evaluation
 and certification scheme. PSA provides a recipe, based on
 industry best practice, that allows security to be consistently designed in, at
 both a hardware and firmware level.</p>
 <p>The PSA Cryptographic API (Crypto API) described in this document is an
 important PSA component that provides an interface to cryptographic operations
 on resource-constrained devices. The interface is user-friendly, while still
 providing access to the low-level primitives used in modern cryptography. It
 does not require that the user has access to the key material. Instead, it uses
 opaque key identifiers.</p>
 <p>This document is part of the PSA family of specifications. It defines an
 interface for cryptographic services, including cryptography primitives and a
 key storage functionality.</p>
 <p>This document includes:</p>
 <ul class="simple">
 <li>A <a class="reference internal" href="goals.html#design-goals"><span class="std std-ref">rationale</span></a> for the design.</li>
 <li>A <a class="reference internal" href="functionality.html#functionality-overview"><span class="std std-ref">high-level overview of the functionality</span></a>
 provided by the interface.</li>
 <li>A <a class="reference internal" href="sample-arch.html#architectures"><span class="std std-ref">description of typical architectures</span></a> of
 implementations for this specification.</li>
 <li>General considerations <a class="reference internal" href="implementation.html#implementation-considerations"><span class="std std-ref">for implementers</span></a>
 of this specification and <a class="reference internal" href="usage.html#usage-considerations"><span class="std std-ref">for applications</span></a> that
 use the interface defined in this specification.</li>
 <li>A <a class="reference internal" href="../api/library/index.html#api-reference"><span class="std std-ref">detailed definition</span></a> of the API.</li>
 </ul>
 <p>Companion documents will define <em>profiles</em> for this specification. A profile is
 a minimum mandatory subset of the interface that a compliant implementation must
 provide.</p>
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	<div class="section" id="introduction">
	<h1>Introduction</h1>
	<p>Arm’s Platform Security Architecture (PSA) is a holistic set of threat models,
	security analyses, hardware and firmware architecture specifications, an
	open source firmware reference implementation, and an independent evaluation
	and certification scheme. PSA provides a recipe, based on
	industry best practice, that allows security to be consistently designed in, at
	both a hardware and firmware level.</p>
	<p>The PSA Cryptographic API (Crypto API) described in this document is an
	important PSA component that provides an interface to cryptographic operations
	on resource-constrained devices. The interface is user-friendly, while still
	providing access to the low-level primitives used in modern cryptography. It
	does not require that the user has access to the key material. Instead, it uses
	opaque key identifiers.</p>
	<p>This document is part of the PSA family of specifications. It defines an
	interface for cryptographic services, including cryptography primitives and a
	key storage functionality.</p>
	<p>This document includes:</p>
	<ul class="simple">
	<li>A <a class="reference internal" href="goals.html#design-goals"><span class="std std-ref">rationale</span></a> for the design.</li>
	<li>A <a class="reference internal" href="functionality.html#functionality-overview"><span class="std std-ref">high-level overview of the functionality</span></a>
	provided by the interface.</li>
	<li>A <a class="reference internal" href="sample-arch.html#architectures"><span class="std std-ref">description of typical architectures</span></a> of
	implementations for this specification.</li>
	<li>General considerations <a class="reference internal" href="implementation.html#implementation-considerations"><span class="std std-ref">for implementers</span></a>
	of this specification and <a class="reference internal" href="usage.html#usage-considerations"><span class="std std-ref">for applications</span></a> that
	use the interface defined in this specification.</li>
	<li>A <a class="reference internal" href="../api/library/index.html#api-reference"><span class="std std-ref">detailed definition</span></a> of the API.</li>
	</ul>
	<p>Companion documents will define <em>profiles</em> for this specification. A profile is
	a minimum mandatory subset of the interface that a compliant implementation must
	provide.</p>
	</div>


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	<li>Previous: <a href="../index.html" title="previous chapter">PSA Cryptography API 1.0</a></li>
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