File:Public key making.svg
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[edit] Summary
Public-key cryptography / asymmetric cryptography, creating a key pair.
A big random number is use to create a key pair. When the keys have been made the big random number is thrown away. Without knowledge of the random number it should be "impossible" to create the private key from the public key. (In many algorithms it is also "impossible" to create the public key from the private key once the random number has been thrown away.) The public key can be freely published to the world.
Note that most key making functions internally need more than one random number. To handle this the "big random number" usually is fed as a seed to a cryptographically secure random number generator that then produces many pseudo random numbers for the key making function.
Original illustration by David Göthberg, Sweden.
Released by David as public domain.
[edit] Licensing
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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.
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[edit] Other versions
See Category:Cryptography diagrams for several related diagrams. (That category is on Wikimedia Commons.)
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:26, 19 May 2007 | | 426 × 384 (14 KB) | Davidgothberg | One more try, now using "Arial, Bold, 24" instead of "Arial Black, 22". |
| 02:22, 19 May 2007 |  | 426 × 384 (13 KB) | Davidgothberg | Trying with new font like Geni suggested. Now with the new terminology too. | |
| 01:44, 19 May 2007 |  | 409 × 384 (15 KB) | Geni | again | |
| 01:41, 19 May 2007 |  | 409 × 384 (14 KB) | Geni | attempt to fix 2 all this still PD | |
| 01:36, 19 May 2007 |  | 409 × 384 (13 KB) | Geni | trying to fix | |
| 01:08, 19 May 2007 |  | 409 × 384 (13 KB) | Davidgothberg | Reverted to earlier revision | |
| 01:06, 19 May 2007 |  | 426 × 384 (10 KB) | Davidgothberg | Argh! Previous image did not render right on Wikipedia. Trying new version saved in slightly different way... | |
| 01:02, 19 May 2007 |  | 426 × 384 (13 KB) | Davidgothberg | Slight change of terminology. User Birkett pointed it out and the Google test confirms it. "Key making function" -> "Key generation function" | |
| 18:43, 21 August 2006 |  | 409 × 384 (13 KB) | Davidgothberg | Slightly improved image. (Damn, this non-wysiwyg!) | |
| 18:39, 21 August 2006 |  | 409 × 384 (13 KB) | Davidgothberg | Slightly improved image. | |
| 18:35, 21 August 2006 |  | 409 × 384 (13 KB) | Davidgothberg | Slightly improved image. | |
| 13:22, 9 August 2006 |  | 409 × 384 (9 KB) | Davidgothberg | Slightly improved image. Will still have damaged arrows but I will fix that when I come home from my vacation. | |
| 07:54, 7 August 2006 |  | 415 × 320 (10 KB) | Davidgothberg | Last image was damaged, I hope this fixes it. | |
| 07:31, 7 August 2006 |  | 415 × 320 (14 KB) | Davidgothberg | Public-key cryptography / asymmetric cryptography, creating a key pair. A big random number is used to create a key pair. When the keys have been made the big random number is thrown away. Without knowledge of the random number it should be "impossible" |
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