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Gilles

20:13

Q: Patent on comparing two values which are put through a hash function to determine if the same

I came across this patent titled “Similarity-based access control of data in a data processing system” (priority date: 2007-03-15). Abstract: Similarity of data items is determined by analyzing corresponding segments of the data items. A function is applied to each segment of a data item...

this looks like a long-known authentication scheme, but it's too late in the day for me to parse a patent claim

A computer-implemented method, the method comprising:

(A) for a first data item comprising a first plurality of parts,
(a1) applying a first function to each part of said first plurality of parts to obtain a corresponding part value for each part of said first plurality of parts, wherein each part of said first plurality of parts comprises a corresponding sequence of bits, and wherein the part value for each particular part of said first plurality of parts is based, at least in part, on the corresponding bits in the particular part, and wherein two identical parts will have the same part v…

Thomas Pornin

It looks like hashing parts of files to determine equality on a file fraction basis. rsync has been doing this for a decade, and p2p protocols too.

Gilles

@ThomasPornin someone answered that. But the patent was filed in 1995, which is earlier than rsync

Rory Alsop

@LucasKauffman an earring and a flesh tunnel - yes :-)

Lucas Kauffman

@RoryAlsop a flesh tunnel :D?

cool

mr alsop you are OP as we say in LoL

Rory Alsop

@LucasKauffman OP? LOL?

Lucas Kauffman

20:24

League of Legends

Over Powered

Rory Alsop

heh

Lucas Kauffman

mmmm too old for games?

Rory Alsop

this sort of thing

Lucas Kauffman

I know those

friend of mine has a massive one

I always try to hang stuff on it

Rory Alsop

I don't know league of legends, but having a lot of fun playing Black Mesa right now

Lucas Kauffman

20:25

then he slaps me

Rory Alsop

heh

Lucas Kauffman

@RoryAlsop it's a tower defence

Rory Alsop

ahhh - in that case I approve whole-heartedly

Scott Pack

@RoryAlsop I'll give you a moment to think about what I thought of when reading that.

Rory Alsop

I am also messing with this this evening:

duelinganalogs.com/game/infectonator-2

adric

20:27

/me threw in a different kind of answer to the OTP question.

Rory Alsop

@ScottPack I did actually worry what google images would return when I did a search for an appropriate image

Scott Pack

TO THE GOOGLES!

Nothing interesting.

Lucas Kauffman

@RoryAlsop youtube.com/watch?v=afiNqahGICU&feature=relmfu

AviD

@RoryAlsop that's gross.

I thought you meant something more like this.

Rory Alsop

@AviD I ain't clicking that!

AviD

20:30

@RoryAlsop heh, apparently @ScottPack thought that too.

Scott Pack

@AviD That actually does bring up an interesting question with respect to kosher diet and oral stimulation.

Rory Alsop

Presented a pitch to a client today and had one of our Tel Aviv guys on the dial in to go into some of the more ... weaponised... aspects of cyber security :-)

AviD

hehe

anyone I know?

Lucas Kauffman

@RoryAlsop talking DoS or Drones?

Rory Alsop

@AviD Dunno - a chap called Gadi Evron

AviD

20:32

prolly stuxnet...

Rory Alsop

@LucasKauffman just some threat management stuff :-)

AviD

@RoryAlsop ah yeah, he's semi-well known in the "cyber" arena.

Lucas Kauffman

@RoryAlsop haha like going in at a client for project X and then scaring the living daylights out of them so they buy a security assessment? :P

AviD

then again, infosec reactions also make fun of "cyber" folks.

Rory Alsop

@LucasKauffman no, not this time. Trying to remember if any of the guys you know were involved in a previous piece where our 'physical security' guy didn't even have a picture in the proposal. He was a silhouette...

well - he did have guns

and stuff

Lucas Kauffman

20:36

lol what :P?

what type of physical security you guys get into?

AviD

@RoryAlsop he does a lot of guvmint consulting, too.

talks a lot at cyber confs...

Rory Alsop

@AviD seems like a good guy. If we win this piece I'll hopefully get to meet him in person rather than just over conf calls

AviD

@RoryAlsop you'd like him. He's as good a PHB as they come ;-)

Lucas Kauffman

@RoryAlsop maybe we can work together once in a distant feature :o

Rory Alsop

@LucasKauffman could happen :-)

@AviD ...why I oughta.... I'm a PHB these days :-(

AviD

20:50

@RoryAlsop hahaha

actually, I meant more of an Executive Consultant, rather than PHB.

you know the type...

Lucas Kauffman

@RoryAlsop how long have you been senior?

Scott Pack

@LucasKauffman Ever since he turned 65, so 10-15 years.

AviD

all his life

Lucas Kauffman

btw where is other Rory, did he get back from Belgium in one piece?

Rory Alsop

@ScottPack well played

@LucasKauffman erm...too many years. Maybe senior manager at EY for 4 or 5 years, then ran my own consultancies for a wee bit

@LucasKauffman haven't seen him - I blame the Belgian beers :-)

Scott Pack

20:55

@RoryAlsop Too much banana. I mean really. Who in their right mind puts banana in beer?

AviD

they put banana in their beer?

I think they misunderstood Ernie and Bert.

Lucas Kauffman

@RoryAlsop y u no become director/partner?

Rory Alsop

@LucasKauffman Scotland is small country - business case requires a certain amount of legwork

Lucas Kauffman

21:12

aaaw :(

Id love to see a partner with an eartunnel

wtf retards, my serverprovider just told me that 10% of my advertised speed is normal

Thomas Pornin

22:09

For whom it may interest: SHA-3 has been selected, and is the Keccak function.

Scott Pack

22:29

Is it yours?

Thomas Pornin

Nope. Mine was not included in round 3.

That's too bad because mine, at least, was substantially faster than SHA-256/512

Scott Pack

Too good for public release? It.figures.

Thomas Pornin

Well, all SHA-3 candidates have been published, and all received a fair bit of analysis, so they can be considered at least reasonable replacements for any function which is known to be slightly broken (e.g. SHA-1)