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hash - Why does C# generate different EXEs for the same source-code?

Every time we recompile our C# application we end up with EXEs with different MD5 signatures. We are recompiling on the ... a way to fix this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hash - Python frozenset hashing algorithm / implementation

I'm currently trying to understand the mechanism behind the hash function defined for Python's built-in frozenset ... h = 590923713 return h See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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666 views

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hash - SHA2 password hashing in java

I'm trying to hash some passwords with SHA2. Where can I get a snippet of java code for make that? I have ... key (line 2) Thanks in advance See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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412 views

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hash - OpenCV: Fingerprint Image and Compare Against Database

I have a database of images. When I take a new picture, I want to compare it against the images in this ... a commercial solution. Best, Stefan See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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491 views

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hash - How can I SHA512 a string in C#?

I am trying to write a function to take a string and sha512 it like so? public string SHA512(string input) { ... } What should the magic be? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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582 views

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hash - HMAC-SHA1: How to do it properly in Java?

I'm hashing some values using HMAC-SHA1, using the following code in Java: public static String hmacSha1(String value ... out why. Any tips? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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405 views

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hash - how is hashCode() implemented in Java

How is hashCode() implemented? My assumption is that it uses the object memory location as the initial number (the seed ... to stay on topic :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

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hash - Excel formula-based function for SHA256 / SHA512 hashing without VBA or macros

It's the year 2017 and anybody who needs to use hashes should avoid 'broken' ones such as MD5, if ... excel-function-md5-hashing-without-vba/ See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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401 views

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hash - How can I represent sets in Perl?

I would like to represent a set in Perl. What I usually do is using a hash with some dummy value, e.g.: ... I use defined or exists? Thank you See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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417 views

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hash - Understanding sha-1 collision weakness

According to various sources, attacks looking for sha-1 collisions have been improved to 2^52 operations: http://www. ... don't worry about it". See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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409 views

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hash - What is the correct format for a blowfish salt using PHP's crypt?

I have read the information provided on the PHP Manual Entry for crypt(), but I find myself still ... three characters are so significant? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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582 views

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hash - SHA1 collision demo / example

This question is similar to this, but that one only references MD5 collision demos. Are there any actual SHA1 ... my hands on any examples. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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739 views

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hash - Hashing 2D, 3D and nD vectors

What are good hashing functions (fast, good distribution, few collisions) for hashing 2d and 3d vectors composed of ... not the best solution. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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677 views

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hash - Algorithm Complexity & Security: MD5 or SHA1?

Which is the best overall hashing algorithm in terms of complexity and security? md5 or sha1? From what I know ... md5. Am I missing anything? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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640 views

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hash - Hashing with SHA1 Algorithm in C#

I want to hash given byte[] array with using SHA1 Algorithm with the use of SHA1Managed. The byte[] hash will come ... new SHA1Managed()) { } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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620 views

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hash - How to "EXPIRE" the "HSET" child key in redis?

I need to expire all keys in redis hash, which are older than 1 month. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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408 views

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hash - MurmurHash - what is it?

I've been trying to get a high level understanding of what MurmurHash does. I've read a basic description ... to understand the risks/benefits. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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438 views

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hash - Python: why can I put mutable object in a dict or set?

Given the following example, class A(object): pass a = A() a.x = 1 Obviously a is mutable, and ... identify the object and avoid duplication? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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428 views

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hash - Why and how are Python functions hashable?

I recently tried the following commands in Python: >>> {lambda x: 1: 'a'} {<function __main__.<lambda>>: 'a ... what is the hash of a function? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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570 views

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hash - Best practice for hashing passwords - SHA256 or SHA512?

I am currently using SHA256 with a salt to hash my passwords. Is it better to continue using SHA256 or should I change to SHA512? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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799 views

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hash function - Maximum length for MD5 input/output

What is the maximum length of the string that can have md5 hashed? Or: If it has no limit, and if so ... max length of the md5 output value? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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535 views

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hash - Git is moving to new hashing algorithm SHA-256 but why git community settled on SHA?256

I just learned from this HN-post that git is moving to new hashing algorithm ( from SHA-1 to SHA-256 ) ... //crypto.stackexchange.com/q/26336 ) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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570 views

1 answer

hash - Java: A "prime" number or a "power of two" as HashMap size?

Many books and tutorials say that the size of a hash table must be a prime to evenly distribute the keys in all ... two" as the hash table size? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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529 views

1 answer

hash - Java: A "prime" number or a "power of two" as HashMap size?

Many books and tutorials say that the size of a hash table must be a prime to evenly distribute the keys in all ... two" as the hash table size? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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661 views

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hash - Multidimensional associative arrays in Bash

I'm trying to create a multidimensional associative array but need some help. I have reviewed the page suggested in ... the for loop? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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664 views

1 answer

hash - Why are 5381 and 33 so important in the djb2 algorithm?

The djb2 algorithm has a hash function for strings. unsigned long hash = 5381; int c; while (c = *str++) ... Why are 5381 and 33 so important? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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560 views

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hash - How does double arrow (=>) operator work in Perl?

I know about the hash use of the => operator, like this $ cat array.pl %ages = ('Martin' => 28, 'Sharon' ... more ways in which => can be used? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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601 views

1 answer

hash - Java calculate hex representation of a SHA-1 digest of a String

I'm storing the user password on the db as a sha1 hash. Unfortunately I'm getting strange answers. I'm storing the string ... --> ?V@D~fx????:?8 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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