hash-function

问题 I am doing a hacking challenge from Hack This Site in which I found a password hash and then cracked it by brute forcing possibilities. The format that my hash cracker (John the Ripper) used was something called "FreeBSD MD5". The password and hash are the following: PW: shadow HASH: $1$AAODv...$gXPqGkIO3Cu6dnclE/sok1 My question is, doesn't MD5 normally only have the charset 0123456789abcdef (hexadecimal)? Why is this hash suddenly including a bunch of other characters? Screenshot: 回答1: This

问题 I am doing a hacking challenge from Hack This Site in which I found a password hash and then cracked it by brute forcing possibilities. The format that my hash cracker (John the Ripper) used was something called "FreeBSD MD5". The password and hash are the following: PW: shadow HASH: $1$AAODv...$gXPqGkIO3Cu6dnclE/sok1 My question is, doesn't MD5 normally only have the charset 0123456789abcdef (hexadecimal)? Why is this hash suddenly including a bunch of other characters? Screenshot: 回答1: This

问题 I am doing a hacking challenge from Hack This Site in which I found a password hash and then cracked it by brute forcing possibilities. The format that my hash cracker (John the Ripper) used was something called "FreeBSD MD5". The password and hash are the following: PW: shadow HASH: $1$AAODv...$gXPqGkIO3Cu6dnclE/sok1 My question is, doesn't MD5 normally only have the charset 0123456789abcdef (hexadecimal)? Why is this hash suddenly including a bunch of other characters? Screenshot: 回答1: This

问题 I have two UUIDs. I want to hash them perfectly to produce a single unique value, but with a constraint that f(m,n) and f(n,m) must generate the same hash. UUIDs are 128-bit values the hash function should have no collisions - all possible input pairings must generate unique hash values f(m,n) and f(n,m) must generate the same hash - that is, ordering is not important I'm working in Go, so the resulting value must fit in a 256-bit int the hash does not need to be reversible Can anyone help?

问题 I want to have a dictionary that assigns a value to a set of integers. For example key is [1 2 3] and value will have certain value. The thing is that [3 2 1] needs to be treated the same in my case so hash needs to be equal, if I go with hash approach. The set will have 2 to 10 items. Sum of items is usually fixed so we cannot make hashcode according to sum, which is a first natural idea here. Not a homework task, actually facing this problem in my code. This set is basically IEnumerable<int

问题 I wanted to create a custom hash function for an unordered map. I found this question: C++ unordered_map fail when used with a vector as key and found that if you use a vector as a key in an unordered map, you need to create your own hash function. I experimented copying the hash function written as so: template <typename Container> struct container_hash { std::size_t operator()(Container const& c) const { return boost::hash_range(c.begin(), c.end()); } }; But when I try to create an

问题 I wanted to create a custom hash function for an unordered map. I found this question: C++ unordered_map fail when used with a vector as key and found that if you use a vector as a key in an unordered map, you need to create your own hash function. I experimented copying the hash function written as so: template <typename Container> struct container_hash { std::size_t operator()(Container const& c) const { return boost::hash_range(c.begin(), c.end()); } }; But when I try to create an

问题 I have a problem implementing minhashing. On paper and from reading I understand the concept, but my problem is the permutation "trick". Instead of permuting the matrix of sets and values the suggestion for implementation is: "pick k (e.g. 100) independent hash functions" and then the algorithm says: for each row r for each column c if c has 1 in row r for each hash function h_i do if h_i(r) is a smaller value than M (i, c) then M(i, c) := h_i(r) In different small examples and teaching book

问题 Referring to the original problem: Optimizing hand-evaluation algorithm for Poker-Monte-Carlo-Simulation I have a list of 5 to 7 cards and want to store their value in a hashtable, which should be an array of 32-bit-integers and directly accessed by the hashfunctions value as index. Regarding the large amount of possible combinations in a 52-card-deck, I don't want to waste too much memory. Numbers: 7-card-combinations: 133784560 6-card-combinations: 20358520 5-card-combinations: 2598960

问题 Description of problem: I'm in the process of working with a highly sensitive data-set that contains the people's phone number information as one of the columns. I need to apply (encryption/hash function on them) to convert them as some encoded values and do my analysis. It can be an one-way hash - i.e, after processing with the encrypted data we wont be converting them back to original phone numbers. Essentially, am looking for an anonymizer that takes phone numbers and converts them to some