Update 4_5_0_final.adoc
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= Signature SPI
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The Signature SPI makes it possible to plug-in additional signature algorithms. Not only does it enable
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additional signatures, but it also enables changing how signatures are generated. For example this would allow
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using an HSM device to sign tokens.
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The Signature SPI makes it possible to plug-in additional signature algorithms. This enables additional signatures and also enables changing how signatures are generated. For example, using this allows using an HSM device to sign tokens.
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Thanks to https://github.com/tnorimat[tnorimat] for contributing a signficant part of this work.
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@ -13,10 +11,10 @@ Alongside the Signature SPI there is now also support for additional signature a
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Keycloak now has support for RS256, RS384, RS512, ES256, ES384, ES512, HS256, HS384 and HS512.
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Elliptic Curve Digital Signature Algorithm (ES256/384/512) are very interesting as they provide similar
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security properties as RSA signatures, but uses significantly less CPU.
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security properties as RSA signatures, but use significantly less CPU.
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HMAC (HS256/384/512) are also very useful when you do not want your application to verify the signature itself.
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Since these are symmetric signatures only Keycloak is able to verify the signature, which requires the
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application to use the token introspection endpoint to verify tokens.
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Thanks to https://github.com/tnorimat[tnorimat] for contributing a signficant part of this work.
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Thanks to https://github.com/tnorimat[tnorimat] for contributing a signficant part of this work.
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