Entries Tagged "redaction"

Page 1 of 3

Redacting Documents with a Black Sharpie Doesn’t Work

We have learned this lesson again:

As part of the FTC v. Microsoft hearing, Sony supplied a document from PlayStation chief Jim Ryan that includes redacted details on the margins Sony shares with publishers, its Call of Duty revenues, and even the cost of developing some of its games.

It looks like someone redacted the documents with a black Sharpie ­ but when you scan them in, it’s easy to see some of the redactions. Oops.

I don’t particularly care about the redacted information, but it’s there in the article.

Posted on June 29, 2023 at 10:37 AM • View Comments

Reverse-Engineering the Redactions in the Ghislaine Maxwell Deposition

Slate magazine was able to cleverly read the Ghislaine Maxwell deposition and reverse-engineer many of the redacted names.

We’ve long known that redacting is hard in the modern age, but most of the failures to date have been a result of not realizing that covering digital text with a black bar doesn’t always remove the text from the underlying digital file. As far as I know, this reverse-engineering technique is new.

EDITED TO ADD: A similar technique was used in 1991 to recover the Dead Sea Scrolls.

Posted on October 27, 2020 at 6:34 AM • View Comments

WikiLeaks Releases CIA Hacking Tools

WikiLeaks just released a cache of 8,761 classified CIA documents from 2012 to 2016, including details of its offensive Internet operations.

I have not read through any of them yet. If you see something interesting, tell us in the comments.

EDITED TO ADD: There’s a lot in here. Many of the hacking tools are redacted, with the tar files and zip archives replaced with messages like:

::: THIS ARCHIVE FILE IS STILL BEING EXAMINED BY WIKILEAKS. :::

::: IT MAY BE RELEASED IN THE NEAR FUTURE. WHAT FOLLOWS IS :::
::: AN AUTOMATICALLY GENERATED LIST OF ITS CONTENTS: :::

Hopefully we’ll get them eventually. The documents say that the CIA—and other intelligence services—can bypass Signal, WhatsApp and Telegram. It seems to be by hacking the end-user devices and grabbing the traffic before and after encryption, not by breaking the encryption.

New York Times article.

EDITED TO ADD: Some details from The Guardian:

According to the documents:

  • CIA hackers targeted smartphones and computers.
  • The Center for Cyber Intelligence is based at the CIA headquarters in Virginia but it has a second covert base in the US consulate in Frankfurt which covers Europe, the Middle East and Africa.
  • A programme called Weeping Angel describes how to attack a Samsung F8000 TV set so that it appears to be off but can still be used for monitoring.

I just noticed this from the WikiLeaks page:

Recently, the CIA lost control of the majority of its hacking arsenal including malware, viruses, trojans, weaponized “zero day” exploits, malware remote control systems and associated documentation. This extraordinary collection, which amounts to more than several hundred million lines of code, gives its possessor the entire hacking capacity of the CIA. The archive appears to have been circulated among former U.S. government hackers and contractors in an unauthorized manner, one of whom has provided WikiLeaks with portions of the archive.

So it sounds like this cache of documents wasn’t taken from the CIA and given to WikiLeaks for publication, but has been passed around the community for a while—and incidentally some part of the cache was passed to WikiLeaks. So there are more documents out there, and others may release them in unredacted form.

Wired article. Slashdot thread. Two articles from the Washington Post.

EDITED TO ADD: This document talks about Comodo version 5.X and version 6.X. Version 6 was released in Feb 2013. Version 7 was released in Apr 2014. This gives us a time window of that page, and the cache in general. (WikiLeaks says that the documents cover 2013 to 2016.)

If these tools are a few years out of date, it’s similar to the NSA tools released by the “Shadow Brokers.” Most of us thought the Shadow Brokers were the Russians, specifically releasing older NSA tools that had diminished value as secrets. Could this be the Russians as well?

EDITED TO ADD: Nicholas Weaver comments.

EDITED TO ADD (3/8): These documents are interesting:

The CIA’s hand crafted hacking techniques pose a problem for the agency. Each technique it has created forms a “fingerprint” that can be used by forensic investigators to attribute multiple different attacks to the same entity.

This is analogous to finding the same distinctive knife wound on multiple separate murder victims. The unique wounding style creates suspicion that a single murderer is responsible. As soon one murder in the set is solved then the other murders also find likely attribution.

The CIA’s Remote Devices Branch‘s UMBRAGE group collects and maintains a substantial library of attack techniques ‘stolen’ from malware produced in other states including the Russian Federation.

With UMBRAGE and related projects the CIA cannot only increase its total number of attack types but also misdirect attribution by leaving behind the “fingerprints” of the groups that the attack techniques were stolen from.

UMBRAGE components cover keyloggers, password collection, webcam capture, data destruction, persistence, privilege escalation, stealth, anti-virus (PSP) avoidance and survey techniques.

This is being spun in the press as the CIA is pretending to be Russia. I’m not convinced that the documents support these allegations. Can someone else look at the documents. I don’t like my conclusion that WikiLeaks is using this document dump as a way to push their own bias.

Posted on March 7, 2017 at 9:08 AM • View Comments

Merry Christmas from the NSA

On Christmas Eve, the NSA released a bunch of audit reports on illegal spying using EO 12333 from 2001 to 2013.

Bloomberg article.

The heavily-redacted reports include examples of data on Americans being e-mailed to unauthorized recipients, stored in unsecured computers and retained after it was supposed to be destroyed, according to the documents. They were posted on the NSA’s website at around 1:30 p.m. on Christmas Eve.

In a 2012 case, for example, an NSA analyst “searched her spouse’s personal telephone directory without his knowledge to obtain names and telephone numbers for targeting,” according to one report. The analyst “has been advised to cease her activities,” it said.

The documents were released in response to an ACLU lawsuit.

Another article.

EDITED TO ADD (12/27): Remember Edward Snowden’s comment that he could eavesdrop on anybody? “I, sitting at my desk, certainly had the authorities to wiretap anyone, from you, or your accountant, to a federal judge, to even the President if I had a personal email.” Lots of people have accused him of lying. Here’s former NSA General Counsel Stewart Baker: “All that makes Snowden’s claim about being able to wiretap anyone extremely unlikely—and certainly not demonstrated by the latest disclosures, despite Glenn Greenwald’s claims to the contrary.”

These documents demonstrate that Snowden is probably correct. In these documents, NSA agents target all sorts of random Americans.

Posted on December 26, 2014 at 6:29 AM • View Comments

The NSA's Cryptolog

The NSA has published declassified versions of its Cryptolog newsletter. All the issues from Aug 1974 through Summer 1997 are on the web, although there are some pretty heavy redactions in places. (Here’s a link to the documents on a non-government site, in case they disappear.)

I haven’t even begun to go through these yet. If you find anything good, please post it in comments.

Posted on March 26, 2013 at 2:15 PM • View Comments

How the FBI Intercepts Cell Phone Data

Good article on “Stingrays,” which the FBI uses to monitor cell phone data. Basically, they trick the phone into joining a fake network. And, since cell phones inherently trust the network—as opposed to computers which inherently do not trust the Internet—it’s easy to track people and collect data. There are lots of questions about whether or not it is illegal for the FBI to do this without a warrant. We know that the FBI has been doing this for almost twenty years, and that they know that they’re on shaky legal ground.

The latest release, amounting to some 300 selectively redacted pages, not only suggests that sophisticated cellphone spy gear has been widely deployed since the mid-’90s. It reveals that the FBI conducted training sessions on cell tracking techniques in 2007 and around the same time was operating an internal “secret” website with the purpose of sharing information and interactive media about “effective tools” for surveillance. There are also some previously classified emails between FBI agents that show the feds joking about using the spy gear. “Are you smart enough to turn the knobs by yourself?” one agent asks a colleague.

Of course, if a policeman actually has your phone, he can suck pretty much everything out of it—again, without a warrant.

Using a single “data extraction session” they were able to pull:

  • call activity
  • phone book directory information
  • stored voicemails and text messages
  • photos and videos
  • apps
  • eight different passwords
  • 659 geolocation points, including 227 cell towers and 403 WiFi networks with which the cell phone had previously connected.

Posted on March 7, 2013 at 1:39 PM • View Comments

State Department Redacts Wikileaks Cables

The ACLU filed a FOIA request for a bunch of cables that Wikileaks had already released complete versions of. This is what happened:

The agency released redacted versions of 11 and withheld the other 12 in full.

The five excerpts below show the government’s selective and self-serving decisions to withhold information. Because the leaked versions of these cables have already been widely distributed, the redacted releases provide unique insight into the government’s selective decisions to hide information from the American public.

Click on the link to see what was redacted.

EDITED TO ADD (3/2): Commentary:

The Freedom of Information Act provides exceptions for a number of classes of information, but the State Department’s declassification decisions appear to be based not on the criteria specified in the statute, but rather on whether the documents embarrass the US or portray the US in a negative light.

Posted on March 1, 2012 at 1:32 PM • View Comments

1 2 3

Sidebar photo of Bruce Schneier by Joe MacInnis.