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Backporting is the action of taking a certain software modification ( patch) and applying it to an older version of the software than it was initially created for. Example:Software v2.0 has a security vulnerability that is fixed by changing the text 'is_insecure' to 'is_secure'. The same security hole exists in Software v1.0 but there the text is called 'is_notsecure'. By taking the modification that fixes Software v2.0 and changing it so that it applies to Software v1.0 one has effectively backported the fix.