File:Public key shared secret.svg

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Summary

DescriptionPublic key shared secret.svg	Public-key cryptography / asymmetric cryptography, shared secret agreement. Alice combines her own private key with Bob's public key to create a shared secret. Likewise Bob combines his own private key with Alice's public key and gets the same shared secret. This secret is now only known by Alice and Bob. The shared secret can be used as a symmetric key for encrypted communication between Alice and Bob and for many other purposes such as MACing and to create multiple message keys etc. Diffie–Hellman key exchange is a method of this type. Original illustration by David Göthberg, Sweden. Released by David as public ___domain.
Date	7 August 2006
Source	Own work
Author	Davidgothberg
Other versions	This image is part in a series of images showing the four basic public-key cryptography operations: Creating a key pair, encrypting, signing, and creating a shared secret. Note that no single cryptosystem can do all three operations: For instance RSA can do encryption and signing, while Diffie–Hellman can create shared secrets. Public key making.svg Public key encryption.svg Public key signing.svg Public key shared secret.svg Public key shared secret-ar.svg See Category:Cryptography diagrams for several related diagrams.
SVG development InfoField	The source code of this SVG is invalid due to 84 errors. This W3C-invalid diagram was created with Inkscape …important. This diagram is translated using SVG `switch` elements: all translations are stored in the same file.

Licensing

I, the copyright holder of this work, release this work into the public ___domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

File history

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	Date/Time	Dimensions	User	Comment
current	17:55, 25 July 2025	581 × 650 (35 KB)	Pietz	just uploaded the previous image again because inkscape mixed up the languages
	17:11, 25 July 2025	512 × 573 (12 KB)	Pietz	Smoother color pallette instead of "paint brush colors" :-)
	19:33, 1 December 2024	581 × 650 (35 KB)	GKNishimoto	File uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for pt-br.
	15:19, 7 July 2017	581 × 650 (28 KB)	Winstonlee	enable chinese language
	21:02, 21 August 2006	581 × 650 (24 KB)	Davidgothberg	Improved image.
	08:39, 7 August 2006	581 × 650 (21 KB)	Davidgothberg	Public-key cryptography / asymmetric cryptography, shared secret agreement. Alice combines her own secret key with Bob's public key to create a shared secret. Likewise Bob combines his own secret key with Alice's public key and gets the same shared secre