How does password salt help against a rainbow table attack?
I’m having some trouble understanding the purpose of a salt to a password. It’s my understanding that the primary use is to hamper … Read more
hash
Why does Python’s hash of infinity have the digits of π?
The hash of infinity in Python has digits matching pi: >>> inf = float(‘inf’) >>> hash(inf) 314159 >>> int(math.pi*1e5) 314159 Is that just … Read more
Is a Python dictionary an example of a hash table?
One of the basic data structures in Python is the dictionary, which allows one to record “keys” for looking up “values” of any … Read more
Is it safe to ignore the possibility of SHA collisions in practice?
Let’s say we have a billion unique images, one megabyte each. We calculate the SHA-256 hash for the contents of each file. The … Read more
How do I search within an array of hashes by hash values in ruby?
I have an array of hashes, @fathers. a_father = { “father” => “Bob”, “age” => 40 } @fathers << a_father a_father = { … Read more
Is it possible to decrypt MD5 hashes?
Someone told me that he has seen software systems that: retrieve MD5 encrypted passwords from other systems; decrypt the encrypted passwords and store … Read more
What is Hash and Range Primary Key?
I am not able to understand what Range / primary key is here in the docs on Working with Tables and Data in … Read more
Why is Git not considered a “block chain”?
Git’s internal data structure is a tree of data objects, wherein each objects only points to its predecessor. Each data block is hashed. … Read more
Where do you store your salt strings?
I’ve always used a proper per-entry salt string when hashing passwords for database storage. For my needs, storing the salt in the DB … Read more
What data type to use for hashed password field and what length?
I’m not sure how password hashing works (will be implementing it later), but need to create database schema now. I’m thinking of limiting … Read more