![]() To encrypt a message with the user’s public key ( n, a ) (n, a) ( n, a ), we first convert the message into a number m m m (using some agreed-upon scheme), and then compute the encrypted message c c c as c = m a m o d n c = m^a \bmod n c = m a mod n. This means that when we multiply a a a and b b b together, the result is congruent to 1 1 1 modulo n n n. The user’s private key would be the pair ( n, b ) (n, b) ( n, b ), where b b b is the modular multiplicative inverse of a modulo n n n. The user’s public key would then be the pair ( n, a ) (n, a) ( n, a ), where aa is any integer not divisible by p p p or q q q. ![]() We might choose two large prime numbers, p p p and q q q, and then compute the product n = p q n = pq n = pq. For example, suppose we want to generate a public-key cryptography system for a user with the initials “ABC”. One way to generate these keys is to use prime numbers and Fermat’s Little Theorem. In a public-key cryptography system, each user has a pair of keys: a public key, which is widely known and can be used by anyone to encrypt a message intended for that user, and a private key, which is known only to the user and is used to decrypt messages that have been encrypted with the corresponding public key. One of the most common applications is in the generation of so-called “public-key” cryptography systems, which are used to securely transmit messages over the internet and other networks. You should definitely flag this as “not an answer”.Fermat’s Little Theorem is used in cryptography in several ways. This is a non-answer - kind of link-only, but that's not the sole problem: the question is a specific debugging problem, and the answer doesn't say anything whatsoever about said debugging problem. Whole content: Hi I did a porting of event bus of guava google's project to. The workflow for canned not-an-answer flags has very recently changed, so this situation will not happen again under the same process. You can't do anything about disputed flag: that means a user with 10000 reputation saw it in the (now-defunct) 10k flag queue and cast an “invalid flag” flag. This is a textbook example of a non-answer which should be deleted. Whole content: This is a great post about centering horizontally and vertically: Twitter Bootstrap - how to center elements horizontally or vertically Maybe the answer was deleted because someone else cast an appropriate flag. ![]() If you had flagged the answer as “low quality and fully redundant with Escaping a String for Use in a preg_ Regular Expression”, that would have told the moderator what to look for and given a proper reason for deletion. If you flagged this answer as “link-only”, it's to be expected that your flag was declined moderators only see the flagged post unless they go looking for more, and a “link-only” flag doesn't tell them to look for more. There is another reason to delete this answer: it's redundant with another answer which also mentions preg_quote with more advice. (or actually, “ preg_quote() from the standard library”) which is a poor answer (it doesn't explain how to use preg_quote), but an answer nonetheless. am I doing the right thing questioning this on meta (I have only made one other meta post before)?Įscaping a String for Use in a preg_ Regular Expression This should be converted to a comment in my opinion, but then I'm just following what I read from the posts at the top of this question - am I interpreting this incorrectly?įinally this answer was also, imho, more worth being a comment - the flag was declined, then the answer was deleted.īasically, am I interpreting the meaning of a "link-only answer" wrong? Perhaps I shouldn't be flagging those answers above. This answer I flagged a while back was disputed. This one had no evidence to support not being a valid answer, then was deleted afterwards by a moderator. It originally contained a single word which linked to the php manual. ![]() Am I doing something wrong with my flagging? Edit: and after flagging this answer twice and posting on here, it has now been deleted. It is the definition of a link-only answer. With the above in mind, I have flagged several answers as "link-only" answers and, recently, a lot of my flags have been declined - a few of which were then deleted by a mod afterwards (hence, myself thinking the flag was actually a correct one). According to this post, we should be flagging link-only answers because an answer should actually contain an answer.
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