The first part of the amendment would put back in a bit of the USA Freedom Act that got stripped out at the last minute, stopping what has been referred to as „backdoor searches“ of American‘s data that was collected under Section 702 of the FISA Amendments Act. This is content, not metadata, and the NSA has very wide leverage to search through it once it‘s been collected. (…)

The second part of the amendment is expected to also block a different kind of backdoor: blocking the US government from mandating that any technology include backdoors for law enforcement (beyond what‘s currently required under the wiretapping CALEA statute). In other words, no more having the NSA go around and tell RSA to use compromised encryption.