Entries Tagged "security policies"

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The NSA is Commandeering the Internet

It turns out that the NSA’s domestic and world-wide surveillance apparatus is even more extensive than we thought. Bluntly: The government has commandeered the Internet. Most of the largest Internet companies provide information to the NSA, betraying their users. Some, as we’ve learned, fight and lose. Others cooperate, either out of patriotism or because they believe it’s easier that way.

I have one message to the executives of those companies: fight.

Do you remember those old spy movies, when the higher ups in government decide that the mission is more important than the spy’s life? It’s going to be the same way with you. You might think that your friendly relationship with the government means that they’re going to protect you, but they won’t. The NSA doesn’t care about you or your customers, and will burn you the moment it’s convenient to do so.

We’re already starting to see that. Google, Yahoo, Microsoft and others are pleading with the government to allow them to explain details of what information they provided in response to National Security Letters and other government demands. They’ve lost the trust of their customers, and explaining what they do—and don’t do—is how to get it back. The government has refused; they don’t care.

It will be the same with you. There are lots more high-tech companies who have cooperated with the government. Most of those company names are somewhere in the thousands of documents that Edward Snowden took with him, and sooner or later they’ll be released to the public. The NSA probably told you that your cooperation would forever remain secret, but they’re sloppy. They’ll put your company name on presentations delivered to thousands of people: government employees, contractors, probably even foreign nationals. If Snowden doesn’t have a copy, the next whistleblower will.

This is why you have to fight. When it becomes public that the NSA has been hoovering up all of your users’ communications and personal files, what’s going to save you in the eyes of those users is whether or not you fought. Fighting will cost you money in the short term, but capitulating will cost you more in the long term.

Already companies are taking their data and communications out of the US.

The extreme case of fighting is shutting down entirely. The secure e-mail service Lavabit did that last week, abruptly. Ladar Levison, that site’s owner, wrote on his homepage: “I have been forced to make a difficult decision: to become complicit in crimes against the American people or walk away from nearly ten years of hard work by shutting down Lavabit. After significant soul searching, I have decided to suspend operations. I wish that I could legally share with you the events that led to my decision.”

The same day, Silent Circle followed suit, shutting down their e-mail service in advance of any government strong-arm tactics: “We see the writing the wall, and we have decided that it is best for us to shut down Silent Mail now. We have not received subpoenas, warrants, security letters, or anything else by any government, and this is why we are acting now.” I realize that this is extreme. Both of those companies can do it because they’re small. Google or Facebook couldn’t possibly shut themselves off rather than cooperate with the government. They’re too large; they’re public. They have to do what’s economically rational, not what’s moral.

But they can fight. You, an executive in one of those companies, can fight. You’ll probably lose, but you need to take the stand. And you might win. It’s time we called the government’s actions what they really are: commandeering. Commandeering is a practice we’re used to in wartime, where commercial ships are taken for military use, or production lines are converted to military production. But now it’s happening in peacetime. Vast swaths of the Internet are being commandeered to support this surveillance state.

If this is happening to your company, do what you can to isolate the actions. Do you have employees with security clearances who can’t tell you what they’re doing? Cut off all automatic lines of communication with them, and make sure that only specific, required, authorized acts are being taken on behalf of government. Only then can you look your customers and the public in the face and say that you don’t know what is going on—that your company has been commandeered.

Journalism professor Jeff Jarvis recently wrote in the Guardian: “Technology companies: now is the moment when you must answer for us, your users, whether you are collaborators in the US government’s efforts to ‘collect it all—our every move on the internet—or whether you, too, are victims of its overreach.”

So while I’m sure it’s cool to have a secret White House meeting with President Obama—I’m talking to you, Google, Apple, AT&T, and whoever else was in the room—resist. Attend the meeting, but fight the secrecy. Whose side are you on?

The NSA isn’t going to remain above the law forever. Already public opinion is changing, against the government and their corporate collaborators. If you want to keep your users’ trust, demonstrate that you were on their side.

This essay originally appeared on TheAtlantic.com.

Slashdot thread. And a good interview with Lavabit’s founder.

Posted on August 15, 2013 at 6:10 AMView Comments

NSA Increasing Security by Firing 90% of Its Sysadmins

General Keith Alexander thinks he can improve security by automating sysadmin duties such that 90% of them can be fired:

Using technology to automate much of the work now done by employees and contractors would make the NSA’s networks “more defensible and more secure,” as well as faster, he said at the conference, in which he did not mention Snowden by name.

Does anyone know a sysadmin anywhere who believes it’s possible to automate 90% of his job? Or who thinks any such automation will actually improve security?

He’s stuck. Computerized systems require trusted people to administer them. And any agency with all that computing power is going to need thousands of sysadmins. Some of them are going to be whistleblowers.

Leaking secret information is the civil disobedience of our age. Alexander has to get used to it.

Posted on August 12, 2013 at 2:33 PMView Comments

NSA Implements Two-Man Control for Sysadmins

In an effort to lock the barn door after the horse has escaped, the NSA is implementing two-man control for sysadmins:

NSA chief Keith Alexander said his agency had implemented a “two-man rule,” under which any system administrator like Snowden could only access or move key information with another administrator present. With some 15,000 sites to fix, Alexander said, it would take time to spread across the whole agency.

[…]

Alexander said that server rooms where such data is stored are now locked and require a two-man team to access them—safeguards that he said would be implemented at the Pentagon and intelligence agencies after a pilot at the NSA.

This kind of thing has happened before. After USN Chief Warrant Officer John Walker sold encryption keys to the Soviets, the Navy implemented two-man control for key material.

It’s an effective, if expensive, security measure—and an easy one for the NSA to implement while it figures out what it really has to do to secure information from IT insiders.

Posted on July 24, 2013 at 6:18 AMView Comments

NSA Secrecy and Personal Privacy

In an excellent essay about privacy and secrecy, law professor Daniel Solove makes an important point. There are two types of NSA secrecy being discussed. It’s easy to confuse them, but they’re very different.

Of course, if the government is trying to gather data about a particular suspect, keeping the specifics of surveillance efforts secret will decrease the likelihood of that suspect altering his or her behavior.

But secrecy at the level of an individual suspect is different from keeping the very existence of massive surveillance programs secret. The public must know about the general outlines of surveillance activities in order to evaluate whether the government is achieving the appropriate balance between privacy and security. What kind of information is gathered? How is it used? How securely is it kept? What kind of oversight is there? Are these activities even legal? These questions can’t be answered, and the government can’t be held accountable, if surveillance programs are completely classified.

This distinction is also becoming important as Snowden keeps talking. There are a lot of articles about Edward Snowden cooperating with the Chinese government. I have no idea if this is true—Snowden denies it—or if it’s part of an American smear campaign designed to change the debate from the NSA surveillance programs to the whistleblower’s actions. (It worked against Assange.) In anticipation of the inevitable questions, I want to change a previous assessment statement: I consider Snowden a hero for whistleblowing on the existence and details of the NSA surveillance programs, but not for revealing specific operational secrets to the Chinese government. Charles Pierce wishes Snowden would stop talking. I agree; the more this story is about him the less it is about the NSA. Stop giving interviews and let the documents do the talking.

Back to Daniel Solove, this excellent 2011 essay on the value of privacy is making the rounds again. And it should.

Many commentators had been using the metaphor of George Orwell’s 1984 to describe the problems created by the collection and use of personal data. I contended that the Orwell metaphor, which focuses on the harms of surveillance (such as inhibition and social control) might be apt to describe law enforcement’s monitoring of citizens. But much of the data gathered in computer databases is not particularly sensitive, such as one’s race, birth date, gender, address, or marital status. Many people do not care about concealing the hotels they stay at, the cars they own or rent, or the kind of beverages they drink. People often do not take many steps to keep such information secret. Frequently, though not always, people’s activities would not be inhibited if others knew this information.

I suggested a different metaphor to capture the problems: Franz Kafka’s The Trial, which depicts a bureaucracy with inscrutable purposes that uses people’s information to make important decisions about them, yet denies the people the ability to participate in how their information is used. The problems captured by the Kafka metaphor are of a different sort than the problems caused by surveillance. They often do not result in inhibition or chilling. Instead, they are problems of information processing—the storage, use, or analysis of data—rather than information collection. They affect the power relationships between people and the institutions of the modern state. They not only frustrate the individual by creating a sense of helplessness and powerlessness, but they also affect social structure by altering the kind of relationships people have with the institutions that make important decisions about their lives.

The whole essay is worth reading, as is—I hope—my essay on the value of privacy from 2006.

I have come to believe that the solution to all of this is regulation. And it’s not going to be the regulation of data collection; it’s going to be the regulation of data use.

EDITED TO ADD (6/18): A good rebutttal to the “nothing to hide” argument.

Posted on June 18, 2013 at 11:02 AMView Comments

Complexity and Security

I have written about complexity and security for over a decade now (for example, this from 1999). Here’s the results of a survey that confirms this:

Results showed that more than half of the survey respondents from mid-sized (identified as 50-2500 employees) and enterprise organizations (identified as 2500+ employees) stated that complex policies ultimately led to a security breach, system outage or both.

Usual caveats for this sort of thing apply. The survey is only among 127 people—I can’t find data on what percentage replied. The numbers are skewed because only those that chose to reply were counted. And the results are based on self-reported replies: no way to verify them.

But still.

Posted on January 29, 2013 at 6:32 AMView Comments

Using Agent-Based Simulations to Evaluate Security Systems

Kay Hamacher and Stefan Katzenbeisser, “Public Security: Simulations Need to Replace Conventional Wisdom,” New Security Paradigms Workshop, 2011.

Abstract: Is more always better? Is conventional wisdom always the right guideline in the development of security policies that have large opportunity costs? Is the evaluation of security measures after their introduction the best way? In the past, these questions were frequently left unasked before the introduction of many public security measures. In this paper we put forward the new paradigm that agent-based simulations are an effective and most likely the only sustainable way for the evaluation of public security measures in a complex environment. As a case-study we provide a critical assessment of the power of Telecommunications Data Retention (TDR), which was introduced in most European countries, despite its huge impact on privacy. Up to now it is unknown whether TDR has any benefits in the identification of terrorist dark nets in the period before an attack. The results of our agent-based simulations suggest, contrary to conventional wisdom, that the current practice of acquiring more data may not necessarily yield higher identification rates.

Both the methodology and the conclusions are interesting.

Posted on September 26, 2012 at 7:11 AMView Comments

Laissez-Faire Access Control

Recently I wrote about the difficulty of making role-based access control work, and how reasearch at Dartmouth showed that it was better to let people take the access control they need to do their jobs, and audit the results. This interesting paper, “Laissez-Faire File Sharing,” tries to formalize the sort of access control.

Abstract: When organizations deploy file systems with access control mechanisms that prevent users from reliably sharing files with others, these users will inevitably find alternative means to share. Alas, these alternatives rarely provide the same level of confidentiality, integrity, or auditability provided by the prescribed file systems. Thus, the imposition of restrictive mechanisms and policies by system designers and administrators may actually reduce the system’s security.

We observe that the failure modes of file systems that enforce centrally-imposed access control policies are similar to the failure modes of centrally-planned economies: individuals either learn to circumvent these restrictions as matters of necessity or desert the system entirely, subverting the goals behind the central policy.

We formalize requirements for laissez-faire sharing, which parallel the requirements of free market economies, to better address the file sharing needs of information workers. Because individuals are less likely to feel compelled to circumvent systems that meet these laissez-faire requirements, such systems have the potential to increase both productivity and security.

Think of Wikipedia as the ultimate example of this. Everybody has access to everything, but there are audit mechanisms in place to prevent abuse.

Posted on November 9, 2009 at 6:59 AMView Comments

Zero-Tolerance Policies

Recent stories have documented the ridiculous effects of zero-tolerance weapons policies in a Delaware school district: a first-grader expelled for taking a camping utensil to school, a 13-year-old expelled after another student dropped a pocketknife in his lap, and a seventh-grader expelled for cutting paper with a utility knife for a class project. Where’s the common sense? the editorials cry.

These so-called zero-tolerance policies are actually zero-discretion policies. They’re policies that must be followed, no situational discretion allowed. We encounter them whenever we go through airport security: no liquids, gels or aerosols. Some workplaces have them for sexual harassment incidents; in some sports a banned substance found in a urine sample means suspension, even if it’s for a real medical condition. Judges have zero discretion when faced with mandatory sentencing laws: three strikes for drug offences and you go to jail, mandatory sentencing for statutory rape (underage sex), etc. A national restaurant chain won’t serve hamburgers rare, even if you offer to sign a waiver. Whenever you hear "that’s the rule, and I can’t do anything about it"—and they’re not lying to get rid of you—you’re butting against a zero discretion policy.

These policies enrage us because they are blind to circumstance. Editorial after editorial denounced the suspensions of elementary school children for offenses that anyone with any common sense would agree were accidental and harmless. The Internet is filled with essays demonstrating how the TSA’s rules are nonsensical and sometimes don’t even improve security. I’ve written some of them. What we want is for those involved in the situations to have discretion.

However, problems with discretion were the reason behind these mandatory policies in the first place. Discretion is often applied inconsistently. One school principal might deal with knives in the classroom one way, and another principal another way. Your drug sentence could depend considerably on how sympathetic your judge is, or on whether she’s having a bad day.

Even worse, discretion can lead to discrimination. Schools had weapons bans before zero-tolerance policies, but teachers and administrators enforced the rules disproportionally against African-American students. Criminal sentences varied by race, too. The benefit of zero-discretion rules and laws is that they ensure that everyone is treated equally.

Zero-discretion rules also protect against lawsuits. If the rules are applied consistently, no parent, air traveler or defendant can claim he was unfairly discriminated against.

So that’s the choice. Either we want the rules enforced fairly across the board, which means limiting the discretion of the enforcers at the scene at the time, or we want a more nuanced response to whatever the situation is, which means we give those involved in the situation more discretion.

Of course, there’s more to it than that. The problem with the zero-tolerance weapons rules isn’t that they’re rigid, it’s that they’re poorly written.

What constitutes a weapon? Is it any knife, no matter how small? Should the penalties be the same for a first grader and a high school student? Does intent matter? When an aspirin carried for menstrual cramps becomes “drug possession,” you know there’s a badly written rule in effect.

It’s the same with airport security and criminal sentencing. Broad and simple rules may be simpler to follow—and require less thinking on the part of those enforcing them—but they’re almost always far less nuanced than our complex society requires. Unfortunately, the more complex the rules are, the more they’re open to interpretation and the more discretion the interpreters have.

The solution is to combine the two, rules and discretion, with procedures to make sure they’re not abused. Provide rules, but don’t make them so rigid that there’s no room for interpretation. Give the people in the situation—the teachers, the airport security agents, the policemen, the judges—discretion to apply the rules to the situation. But—and this is the important part—allow people to appeal the results if they feel they were treated unfairly. And regularly audit the results to ensure there is no discrimination or favoritism. It’s the combination of the four that work: rules plus discretion plus appeal plus audit.

All systems need some form of redress, whether it be open and public like a courtroom or closed and secret like the TSA. Giving discretion to those at the scene just makes for a more efficient appeals process, since the first level of appeal can be handled on the spot.

Zachary, the Delaware first grader suspended for bringing a combination fork, spoon and knife camping utensil to eat his lunch with, had his punishment unanimously overturned by the school board. This was the right decision; but what about all the other students whose parents weren’t as forceful or media-savvy enough to turn their child’s plight into a national story? Common sense in applying rules is important, but so is equal access to that common sense.

This essay originally appeared on the Minnesota Public Radio website.

EDITED TO ADD (11/11): Another example:

A former soldier who handed a discarded shotgun in to police faces at least five years imprisonment for “doing his duty.”

Posted on November 3, 2009 at 11:17 AMView Comments

The Bizarre Consequences of "Zero Tolerance" Weapons Policies at Schools

Good article:

Zachary’s offense? [He’s six years old.] Taking a camping utensil that can serve as a knife, fork and spoon to school. He was so excited about recently joining the Cub Scouts that he wanted to use it at lunch. School officials concluded that he had violated their zero-tolerance policy on weapons, and Zachary was suspended and now faces 45 days in the district’s reform school.

[…]

“Something has to change,” said Dodi Herbert, whose 13-year old son, Kyle, was suspended in May and ordered to attend the Christina district’s reform school for 45 days after another student dropped a pocket knife in his lap.

[…]

The Christina school district attracted similar controversy in 2007 when it expelled a seventh-grade girl who had used a utility knife to cut windows out of a paper house for a class project.

The problem, of course, is that the global rule trumps any situational common sense, any discretion. But in granting discretion those in overall charge must trust people below them who have more detailed situational knowledge. It’s CYA security—the same thing you see at airports. Those involved in the situation can’t be blamed for making a bad decision as long as they follow the rules, no matter how stupid they are and how little they apply to the situation.

Posted on October 15, 2009 at 7:34 AMView Comments

Second SHB Workshop Liveblogging (5)

David Livingstone Smith moderated the fourth session, about (more or less) methodology.

Angela Sasse, University College London (suggested reading: The Compliance Budget: Managing Security Behaviour in Organisations; Human Vulnerabilities in Security Systems), has been working on usable security for over a dozen years. As part of a project called “Trust Economics,” she looked at whether people comply with security policies and why they either do or do not. She found that there is a limit to the amount of effort people will make to comply—this is less actual cost and more perceived cost. Strict and simple policies will be complied with more than permissive but complex policies. Compliance detection, and reward or punishment, also affect compliance. People justify noncompliance by “frequently made excuses.”

Bashar Nuseibeh, Open University (suggested reading: A Multi-Pronged Empirical Approach to Mobile Privacy Investigation; Security Requirements Engineering: A Framework for Representation and Analysis), talked about mobile phone security; specifically, Facebook privacy on mobile phones. He did something clever in his experiments. Because he wasn’t able to interview people at the moment they did something—he worked with mobile users—he asked them to provide a “memory phrase” that allowed him to effectively conduct detailed interviews at a later time. This worked very well, and resulted in all sorts of information about why people made privacy decisions at that earlier time.

James Pita, University of Southern California (suggested reading: Deployed ARMOR Protection: The Application of a Game Theoretic Model for Security at the Los Angeles International Airport), studies security personnel who have to guard a physical location. In his analysis, there are limited resources—guards, cameras, etc.—and a set of locations that need to be guarded. An example would be the Los Angeles airport, where a finite number of K-9 units need to guard eight terminals. His model uses a Stackelberg game to minimize predictability (otherwise, the adversary will learn it and exploit it) while maximizing security. There are complications—observational uncertainty and bounded rationally on the part of the attackers—which he tried to capture in his model.

Markus Jakobsson, Palo Alto Research Center (suggested reading: Male, late with your credit card payment, and like to speed? You will be phished!; Social Phishing; Love and Authentication; Quantifying the Security of Preference-Based Authentication), pointed out that auto insurers ask people if they smoke in order to get a feeling for whether they engage in high-risk behaviors. In his experiment, he selected 100 people who were the victim of online fraud and 100 people who were not. He then asked them to complete a survey about different physical risks such as mountain climbing and parachute jumping, financial risks such as buying stocks and real estate, and Internet risks such as visiting porn sites and using public wi-fi networks. He found significant correlation between different risks, but I didn’t see an overall pattern emerge. And in the discussion phase, several people had questions about the data. More analysis, and probably more data, is required. To be fair, he was still in the middle of his analysis.

Rachel Greenstadt, Drexel University (suggested reading: Practical Attacks Against Authorship Recognition Techniques (pre-print); Reinterpreting the Disclosure Debate for Web Infections), discussed ways in which humans and machines can collaborate in making security decisions. These decisions are hard for several reasons: because they are context dependent, require specialized knowledge, are dynamic, and require complex risk analysis. And humans and machines are good at different sorts of tasks. Machine-style authentication: This guy I’m standing next to knows Jake’s private key, so he must be Jake. Human-style authentication: This guy I’m standing next to looks like Jake and sounds like Jake, so he must be Jake. The trick is to design systems that get the best of these two authentication styles and not the worst. She described two experiments examining two decisions: should I log into this website (the phishing problem), and should I publish this anonymous essay or will my linguistic style betray me?

Mike Roe, Microsoft, talked about crime in online games, particularly in Second Life and Metaplace. There are four classes of people on online games: explorers, socializers, achievers, and griefers. Griefers try to annoy socializers in social worlds like Second Life, or annoy achievers in competitive worlds like World of Warcraft. Crime is not necessarily economic; criminals trying to steal money is much less of a problem in these games than people just trying to be annoying. In the question session, Dave Clark said that griefers are a constant, but economic fraud grows over time. I responded that the two types of attackers are different people, with different personality profiles. I also pointed out that there is another kind of attacker: achievers who use illegal mechanisms to assist themselves.

In the discussion, Peter Neumann pointed out that safety is an emergent property, and requires security, reliability, and survivability. Others weren’t so sure.

Adam Shostack’s liveblogging is here. Ross Anderson’s liveblogging is in his blog post’s comments. Matt Blaze’s audio is here.

Conference dinner tonight at Legal Seafoods. And four more sessions tomorrow.

Posted on June 11, 2009 at 4:50 PMView Comments

Sidebar photo of Bruce Schneier by Joe MacInnis.