@martingreybeard.bsky.social
It's not just a formality, but quite a few of those names have gone on to become Astronomer Royal too...
December 9, 2025 at 2:41 PM
It's not just a formality, but quite a few of those names have gone on to become Astronomer Royal too...
Being able to tell if a woman is interested in me. ("Mastering" is probably stretching a point here. )
December 8, 2025 at 9:16 PM
Being able to tell if a woman is interested in me. ("Mastering" is probably stretching a point here. )
Given how awful the British Empire was, it never cases to amaze me how popular we at these days.
November 30, 2025 at 8:27 PM
Given how awful the British Empire was, it never cases to amaze me how popular we at these days.
23% ??? What about all the oceans? They were ours too.
November 30, 2025 at 8:24 PM
23% ??? What about all the oceans? They were ours too.
"Cryptography is the study of how to turn a given problem into a key management problem" (I can't remember where I read that: from you is a very likely answer).
November 22, 2025 at 1:04 PM
"Cryptography is the study of how to turn a given problem into a key management problem" (I can't remember where I read that: from you is a very likely answer).
There's an awful lot of hand- waving above, but it should give you some sense of what is going on.
November 12, 2025 at 7:24 PM
There's an awful lot of hand- waving above, but it should give you some sense of what is going on.
A quantum computer can reduce the effective length of a ppk key to something like the logarithm of its length. So a 4096 bit RSA key ends up with effectively 20 bit length. That's about a million guesses to get the right answer, which isn't many.
November 12, 2025 at 7:22 PM
A quantum computer can reduce the effective length of a ppk key to something like the logarithm of its length. So a 4096 bit RSA key ends up with effectively 20 bit length. That's about a million guesses to get the right answer, which isn't many.
It turns out that quantum computers can be used to efficiently search for values with a given property (e.g. a number which is a factor of this number). That makes current ppk algorithms (RSA, EC) vulnerable.
November 12, 2025 at 7:07 PM
It turns out that quantum computers can be used to efficiently search for values with a given property (e.g. a number which is a factor of this number). That makes current ppk algorithms (RSA, EC) vulnerable.
Ppk algorithms all depend on an operation that is easy to do one way (e.g. multiply two large primes) and hard to do the other way (e.g. given the product, find the two original primes). Symmetric algorithms don't have this sort of structure.
November 12, 2025 at 7:04 PM
Ppk algorithms all depend on an operation that is easy to do one way (e.g. multiply two large primes) and hard to do the other way (e.g. given the product, find the two original primes). Symmetric algorithms don't have this sort of structure.
I'm sorry. I don't see a problem here? (I don't count the need to pour some in to a glass before you enjoy it as a _problem_.)
November 7, 2025 at 8:48 PM
I'm sorry. I don't see a problem here? (I don't count the need to pour some in to a glass before you enjoy it as a _problem_.)
I always wear socks with shorts, (and of I'm wearing shorts, I am wearing sandals or walking boots too). I am very disappointed to hear that at least half of this is fashionable.
October 31, 2025 at 9:27 PM
I always wear socks with shorts, (and of I'm wearing shorts, I am wearing sandals or walking boots too). I am very disappointed to hear that at least half of this is fashionable.
All of them?
October 29, 2025 at 4:12 PM
All of them?
I know many Greens find the following heresy, but I found Natalie more inspiring than Caroline Lucas when she came (as leader) and talked to Cambridge Greens
October 27, 2025 at 5:17 PM
I know many Greens find the following heresy, but I found Natalie more inspiring than Caroline Lucas when she came (as leader) and talked to Cambridge Greens
You have no idea how happy it makes me to see a German get articles wrong!
October 10, 2025 at 3:16 PM
You have no idea how happy it makes me to see a German get articles wrong!
I'm not sure we do. She's a hardcore nutjob.
September 29, 2025 at 10:11 AM
I'm not sure we do. She's a hardcore nutjob.
Wot, like you? (And me. )
September 27, 2025 at 4:07 PM
Wot, like you? (And me. )
(Obviously Talis knows this, but not all her readers may. )
September 15, 2025 at 7:56 AM
(Obviously Talis knows this, but not all her readers may. )
Being a candidate is not the same as trying to get elected. There are many council seats where one party will win whoever they stand; but being a Green candidate in such a seat still gives voters the chance to make a positive choice (and increase the buzz around the GP).
September 15, 2025 at 7:55 AM
Being a candidate is not the same as trying to get elected. There are many council seats where one party will win whoever they stand; but being a Green candidate in such a seat still gives voters the chance to make a positive choice (and increase the buzz around the GP).
You visit X?
August 6, 2025 at 8:06 AM
You visit X?
Too late, I only need one copy
August 4, 2025 at 2:21 PM
Too late, I only need one copy
I do hope nobody is using an INTEGER*2 to identify satellites...
July 30, 2025 at 8:07 AM
I do hope nobody is using an INTEGER*2 to identify satellites...
The collision resistance of both SHA1 and MD5 has been broken but not (yet) pre-image resistance.
July 17, 2025 at 7:57 PM
The collision resistance of both SHA1 and MD5 has been broken but not (yet) pre-image resistance.
No. That is pre-image resistance, which is a stronger condition. (If you have an efficient algorithm to break pre-image resistance, you can use it to break collision resistance - pick an arbitrary M1, calculate the hash, and then use your algorithm to calculate M2.)
July 17, 2025 at 7:55 PM
No. That is pre-image resistance, which is a stronger condition. (If you have an efficient algorithm to break pre-image resistance, you can use it to break collision resistance - pick an arbitrary M1, calculate the hash, and then use your algorithm to calculate M2.)
Where is this?
July 17, 2025 at 5:23 AM
Where is this?