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docs/censorship/techniques.md

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+# Building Blocks
+
+Censorship is the suppression of speech, public communication, or other information.
+This may be done on the basis that such material is considered objectionable, harmful, sensitive, or “inconvenient”.
+Regardless of the reasons for censorship, the technical measures taken to implement it often look the same.
+*jasima.app* provides a toolkit for circumventing censorship of Internet resources.
+The circumvention methods available will often use collateral freedom, fingerprint resistance, probe resistance, or
+combinations of these and more, to counter the measures put in place by the censor.
+
+## Collateral Freedom
+
+Collateral freedom is an anti-censorship strategy that attempts to make it economically prohibitive for censors to block an Internet resource.
+The way in which a censor restricts access to resources will require knowing which content to block and which to allow.
+It’s incredibly difficult to achieve accuracy with filtering as the Internet is comprised of untagged free-form content that must be categorised at speed.
+This results in either over-blocking or under-blocking, and neither of these are desirable properties for the censor.
+
+This can be exploited by circumvention systems by deploying solutions at places that are “too big to block”, like cloud providers.
+Either encryption or constantly rotating identifiers are then used to prevent censors from identifying requests for censored information that is hosted among other content.
+This forces censors to either allow access to the censored information or take down entire services.
+
+:::info[Todo]
+Difference between unique and global endpoints.
+:::
+
+## Fingerprint Resistance
+
+Fingerprint Resistance, also known as Traffic Obfuscation, is an anti-censorship strategy that attempts to make it difficult to identify the destination, parties, and content of Internet traffic.
+This is more commonly used for general censorship circumvention solutions rather than means of accessing specific resources.
+There is a long tail of types of traffic on the Internet, including critical infrastructure communications like industrial control systems, point-of-sale systems and security systems.
+This can be exploited by circumvention systems by making their traffic look like one of these unclassified systems.
+Not being able to accurately identify the traffic means that the cost of blocking access is unknown, and so it is more difficult for a censor to justify the block.
+
+## Probe Resistance
+
+:::info[Todo]
+Write text.
+:::