Surveillance of Digital Communications
Wednesday, April 29th, 2009 by Darren Sri-Jayantha“In executing the Office of the President, Barack Obama is the bomb.”
This is not necessarily my opinion, but I write it to demonstrate something (the above sentence is inspired by a reddit.com comment I saw, but I cannot find it now). There is a good chance that an email message or other transmission over the packet-switched communications network we call the internet containing some variation of the above sentence, after being filtered using something called deep packet inspection (where a message is dissected and parts of its contents examined by a computer), could be flagged and sent to, say, the NSA for a real human being to have a second look at it. Although this scenario may not be what would happen today, the technological capability for this is now a reality, and there is a good deal of debate about how to approach wiretapping and surveillance of digital communications and infrastructure. Traditional law regarding surveillance in telephone and postal communications is not well-suited for application here.
In our readings for this week, Orin S. Kerr provided a general framework of network surveillance law within a discussion of the USA Patriot Act; Charles Savage reported on wireless eavesdropping abroad; and K. A. Taipale argues that FISA is inadequate and that it should be permissible to programmatically select suspects. Taipale writes that “FISA did not anticipate” the internet or “advanced technical methods for intelligence gathering.” He rightly notes that applying FISA strictly now would mean that “no automated monitoring of any kind could occur” in the vast majority of cases.
Taipale suggests that the law should be modified to use computationally-enable analysis techniques to communications previously prohibited by the law. He suggests content filtering and artificial intelligence techniques to “identify potential threats,” and he suggests traffic analysis to “identify organizations or groups and the key people in them.”
While these capabilities are attractive, their implementation would raise a host of issues regarding legal privacy protections (even where the Fourth Amendment protection against unreasonable search and seizure does not apply) and limited government. Practically speaking, having a judge or congressional committee sign off on every “internet wiretap” on affecting American citizens would be a tremendous challenge because of the technical savvy likely required to understand a (hypothetical) proposed set of criteria. From a more general policy perspective, having the technical infrastructure and institutional procedures to touch, examine, and data mine any and all digital communications made by any American is itself a huge concern; the potential for abuse, either by rogue individuals, by small groups within the institution, or by the institutions themselves, is only exacerbated by giving an institution more capabilities, no matter the built-in protections.
Digital eavesdropping capability is an important tool for intelligence gathering and law enforcement, but should be implemented with caution and foresight. As I see it now, a suitable capability would be, at least when an American is the subject, as specific as possible (e.g., target only one email address) and as simple as possible–a judge should be able to understand and approve or disapprove of its use on a case-by-case basis.