153: Cryptography - Revision history

Waldir at 10:17, 7 August 2023

2023-08-07T10:17:07Z

Jacky720: rv

2022-05-04T21:28:54Z

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Ex Kay Cee Dee at 21:27, 4 May 2022

2022-05-04T21:27:42Z

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Jacky720: rv

2022-05-04T20:58:04Z

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Ex Kay Cee Dee at 20:57, 4 May 2022

2022-05-04T20:57:15Z

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Davidy22: Reverted edits by X. K. C. D. (talk) to last revision by 172.70.130.153

2022-05-04T01:58:31Z

Reverted edits by X. K. C. D. (talk) to last revision by 172.70.130.153

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X. K. C. D. at 00:59, 4 May 2022

2022-05-04T00:59:47Z

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172.70.130.153: /* Explanation */

2022-03-05T17:33:57Z

‎Explanation

Alcazar84 at 15:59, 10 June 2020

2020-06-10T15:59:30Z

Kynde: /* Explanation */

2019-12-06T08:17:39Z

‎Explanation

@@ Line 45: / Line 45: @@
 [[Category:Comics featuring Randall Munroe]]
 [[Category:Comics featuring Cueball]]
-[[Category:Public speaking]]
 [[Category:Banned from conferences]]
 [[Category:Cryptography]]

@@ Line 8: / Line 8: @@
 ==Explanation==
-This comic refers to the study of {{w|cryptography}}. We can note the presence of the {{w|International Association for Cryptologic Research|International Association for Cryptologic Research (IACR)}} logo in the lectern, an association that organizes the most important conferences in the cryptology field.
+This comic refers to the study of {{w|cryptography}}. We can note the presence of the {{w|International Association for Cryptologic Research|International Association for Cryptologic Research (IACR)}} logo in the lectern ([[1661|podium?]]), an association that organizes the most important conferences in the cryptology field.
 [[Randall]], drawn as [[Cueball]] behind the lectern at the podium, is describing a proposed crypto system in which a computer program turns a very large number, called the "{{w|key (cryptography)|key}}," and a message into an encrypted form that can only be read by using the same key, based on the model of a {{w|Feistel cipher}}. Part of any Feistel cipher is the "round function," which determines how the key is applied to the original message; this is applied multiple times with a variety of tricks and techniques to ensure that the process can eventually be reversed. One common component of round functions is the {{w|S-box}}, a simple table that converts input bytes into output bytes, preferably in a way that doesn't correspond to any mathematical rules.

@@ Line 10: / Line 10: @@
 This comic refers to the study of {{w|cryptography}}. We can note the presence of the {{w|International Association for Cryptologic Research|International Association for Cryptologic Research (IACR)}} logo in the lectern, an association that organizes the most important conferences in the cryptology field.
-[[Randall]] drawn as [[Cueball]], behind the lectern at the podium, is describing a proposed crypto system in which a computer program turns a very large number, called the "{{w|key (cryptography)|key}}," and a message into an encrypted form that can only be read by using the same key, based on the model of a {{w|Feistel cipher}}. Part of any Feistel cipher is the "round function," which determines how the key is applied to the original message; this is applied multiple times with a variety of tricks and techniques to ensure that the process can eventually be reversed. One common component of round functions is the {{w|S-box}}, a simple table that converts input bytes into output bytes, preferably in a way that doesn't correspond to any mathematical rules.
+[[Randall]], drawn as [[Cueball]] behind the lectern at the podium, is describing a proposed crypto system in which a computer program turns a very large number, called the "{{w|key (cryptography)|key}}," and a message into an encrypted form that can only be read by using the same key, based on the model of a {{w|Feistel cipher}}. Part of any Feistel cipher is the "round function," which determines how the key is applied to the original message; this is applied multiple times with a variety of tricks and techniques to ensure that the process can eventually be reversed. One common component of round functions is the {{w|S-box}}, a simple table that converts input bytes into output bytes, preferably in a way that doesn't correspond to any mathematical rules.
 Here, the S-box would be implemented by doing the following (with the computer operation actually shown in the diagrams indicated in parentheses):
@@ Line 22: / Line 22: @@
 The {{w|Key space (cryptography)|keyspace}} for a cryptographic algorithm is the number of possible keys the algorithm can possibly accept. For example, {{w|Advanced Encryption Standard|AES-256}} has a keyspace of 2<sup>256</sup> (roughly 1.1579209e+77) possible keys, simply because the algorithm specifies that each key is 256 bits wide. The title text is referring to "searching a keyspace," which is to say, simply trying every key until you find one that works. (For reference, a computer would require roughly the energy of a billion billion supernovas to even count to 2<sup>256</sup>, let alone actually try each one.) The precise wording, "If you got a big keyspace, let me search it" is, of course, another reference to the same song: "If you got a big **** let me search ya" (The word "penis" is censored by the trumpeting of an elephant).
-This was the first comic where Randall was banned from conferences. Since then he has been [[:Category:Banned from conferences|banned from multiple conferences]] for similar pranks, especially in [[541: TED Talk]] there is a whole list of conferences from which he has been banned. This has sometimes resulted in him being invited to those conferences, see more here on this [[541:_TED_Talk#PyCon response|PyCon response]] to Randall claiming he was banned from their conference.
+This was the first comic where Randall was banned from conferences. Since then, he has been [[:Category:Banned from conferences|banned from multiple conferences]] for similar pranks; especially in [[541: TED Talk]], there is a whole list of conferences from which he has been banned. This has sometimes resulted in him being invited to those conferences - see more here on this [[541:_TED_Talk#PyCon response|PyCon response]] to Randall claiming he was banned from their conference.
 ==Transcript==

@@ Line 8: / Line 8: @@
 ==Explanation==
-This comic refers to the study of {{w|cryptography}}. We can note the presence of the {{w|International Association for Cryptologic Research|International Association for Cryptologic Research (IACR)}} logo in the lectern, an association that organizes the most important conferences in the cryptology field. [[Cueball]], behind the lectern at the podium, is describing a proposed crypto system in which a computer program turns a very large number, called the "{{w|key (cryptography)|key}}," and a message into an encrypted form that can only be read by using the same key, based on the model of a {{w|Feistel cipher}}. Part of any Feistel cipher is the "round function," which determines how the key is applied to the original message; this is applied multiple times with a variety of tricks and techniques to ensure that the process can eventually be reversed. One common component of round functions is the {{w|S-box}}, a simple table that converts input bytes into output bytes, preferably in a way that doesn't correspond to any mathematical rules.
+This comic refers to the study of {{w|cryptography}}. We can note the presence of the {{w|International Association for Cryptologic Research|International Association for Cryptologic Research (IACR)}} logo in the lectern, an association that organizes the most important conferences in the cryptology field.
 Here, the S-box would be implemented by doing the following (with the computer operation actually shown in the diagrams indicated in parentheses):
@@ Line 20: / Line 22: @@
 The {{w|Key space (cryptography)|keyspace}} for a cryptographic algorithm is the number of possible keys the algorithm can possibly accept. For example, {{w|Advanced Encryption Standard|AES-256}} has a keyspace of 2<sup>256</sup> (roughly 1.1579209e+77) possible keys, simply because the algorithm specifies that each key is 256 bits wide. The title text is referring to "searching a keyspace," which is to say, simply trying every key until you find one that works. (For reference, a computer would require roughly the energy of a billion billion supernovas to even count to 2<sup>256</sup>, let alone actually try each one.) The precise wording, "If you got a big keyspace, let me search it" is, of course, another reference to the same song: "If you got a big **** let me search ya" (The word "penis" is censored by the trumpeting of an elephant).
-This was the first comic where Cueball/Randall was banned from conferences. Since then he has been banned from multiple types of conferences for similar pranks, especially in [[541: TED Talk]] there is a whole list of conferences from which he has been banned. This has sometimes resulted in him being invited to those conferences, see more here on this [[541:_TED_Talk#PyCon response|PyCon response]] to Randall claiming he was banned from their conference.
+This was the first comic where Randall was banned from conferences. Since then he has been [[:Category:Banned from conferences|banned from multiple conferences]] for similar pranks, especially in [[541: TED Talk]] there is a whole list of conferences from which he has been banned. This has sometimes resulted in him being invited to those conferences, see more here on this [[541:_TED_Talk#PyCon response|PyCon response]] to Randall claiming he was banned from their conference.
 ==Transcript==