Google’s TOS doesn’t eliminate a user’s Fourth Amendment rights, judge rules [pdf]

> Maybe there's some slight doubt in whether or not the image could be a hash collision, which depends on the hash method. It may be incredibly unlikely (near impossible?) for any hash collision depending on the specific hash strategy.

If it was a cryptographic hash (apparently not), this mathematical near-certainty is necessary but not sufficient. Like cryptography used for confidentiality or integrity, the math doesn't at all guarantee the outcome; the implementation is the most important factor.

Each entry in the illegal hash database, for example, relies on some person characterizing the original image as illegal - there is no mathematical formula for defining illegal images - and that characterization could be inaccurate. It also relies on the database's integrity, the user's application and its implementation, even the hash calculator. People on HN can imagine lots of things that could go wrong.

If I were a judge, I'd just want to know if someone witnessed CP or not. It might be unpleasant but we're talking about arresting someone for CP, which even sans conviction can be highly traumatic (including time in jail, waiting for bail or trial, as a ~child molestor) and destroy people's lives and reputations. Do you fancy appearing at a bail hearing about your CP charge, even if you are innocent? 'Kids, I have something to tell you ...'; 'Boss, I can't work for a couple weeks because ...'.

>please use the original title, unless it is misleading or linkbait; don't editorialize. (@dang)

On topic, I like this quote from the first page of the opinion:

>A “hash” or “hash value” is “(usually) a short string of characters generated from a much larger string of data (say, an electronic image) using an algorithm—and calculated in a way that makes it highly unlikely another set of data will produce the same value.” United States v. Ackerman, 831 F.3d 1292, 1294 (10th Cir. 2016) (Gorsuch, J.).

It's amusing to me that they use a supreme court case as a reference for what a hash is rather than eg. a textbook. It makes sense when you consider how the court system works but it is amusing nonetheless that the courts have their own body of CS literature.

Maybe someone could publish a "CS for Judges" book that teaches as much CS as possible using only court decisions. That could actually have a real use case when you think of it. (As other commenters pointed out, the hashing definition given here could use a bit more qualification, and should at least differentiate between neural hashes and traditional ones like MD5, especially as it relates to the likeliness that "another set of data will produce the same value." Perhaps that could be an author's note in my "CS for Judges" book.)

That rule has been around for quite a while, and looks worse for wear now

> Maybe someone could publish a "CS for Judges" book

At last, a form of civic participation which seems both helpful and exciting to me.

That said, I am worried that lot of necessary content may not be easy to introduce with hard precedent, and direct advice or dicta might somehow (?) not be permitted in a case since it's not adversarial... A new career as a professional expert witness--even on computer topics--sounds rather dreary.

> the individual suffering and social damage caused by the actions that he incentivizes

That's some convoluted way to say he deserves 25 years because he may (or may not) at some point in his life molest a kid.

Personally i think that the idea of convicting a man for his thoughts is borderline crazy.

User of child pornography need to be arrested, treated, flagged and receive psychological followup all along their lives, but sending them away for 25 years is lazy and dangerous because when he will get out he will be even worst than before and won't have much to loose.