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Why is hashing all database inputs not considered encryption of the database and what values does hashing database entries from server to client?
Wiki User
∙ 10y ago
Nowadays, simply hashing the database does not provide enough encryption as hackers can run brute forcing software and/or dictionary attacks against them, also using hash decrypters.
With today's sophisticated GPUs, millions of hashes can be cracked a second with programs like John the Ripper and Hashcat. Salting the passwords and information is safer, but still not foolproof by a long way.
Wiki User
∙ 10y ago
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What are the difference between static and dynamic hashing in DBMS?
Search operation in static hashing is time consuming, but in dynamic hashing it is not.
What are the advantages and disadvantages of direct file organization?
Three ways to organize a file for direct access: 1- The key is a unique address - Ex: 9-digit SSN as key requires 1 billion table entries • space tradeoff - Ex: 4 digit employee number requires 1000 table entries • not suitable for dynamic environments 2- The key converts to a unique address - Similar to finding records in contiguous locations: - Ex: flight number + day of year combination in an airline reservation system • Think about the effects of concatenation order on the efficiency. 3- The key converts to a probable address (Hashing) - Key space is larger than the address space (in contrast the previous two) - Multiple key values are mapped to a single address value: Hash(key) fi probable address Home address: the initial probable address for locating a record in a table
What does MD5 encryption mean?
You are probably referring to the MD5 Message-Digest Algorithm which is a widely used cryptographic hash function that produces 128-bit (16-byte) hash values. A hash function is an algorithm that takes a block of data and creates a string of data (hash) of fixed length. By running the algorithm on a received block of data, a user should be able to detect whether the data has been altered because a given block of data should always yield the same hash unless it has been altered. Ideally a hash function will allow easy computation of the hash value for any given message but make it hard to start with the hash value and come up with a message that will yield that hash value. It should also be so difficult to modify a message without changing the hash that the time and effort necessary to do it exceeds the value of doing it and extremely difficult or impractical to find two different messages with the same hash. Note that by its nature the MD5 hash is not supposed to allow you to recover the message that was processed. Usually when we use the word "encryption" we are talking about a process where a message is converted to something called "cyphertext" which is unreadable unless you have the right algorithm and key to decrypt it and convert it back to the original message. In this respect it is more accurate to refer to "MD5 hashing" rather than MD5 encryption. See the attached link for more details on the MD5 hash.
What are the available encryptions in PHP?
PHP has built-in one way hashing using the md5 function. Additional encryption capabilities are available using the Mcrypt extension.
How do you store passwords?
Passwords should be stored using strong encryption techniques, such as hashing algorithms like SHA-256. It's essential to never store passwords in plain text. Additionally, incorporating salt (random data) into the encryption process adds an extra layer of security by making it harder for attackers to crack the passwords. Regularly updating encryption methods and storing passwords securely in a separate database can help protect user information.
What are different types of hashing techniques are there in DBMS?
there are 2 types of hashing techniques 1- Static hashing 2-Dynamic hashing
What is the meaning of the acronym SHA1?
Secure hashing algorithm refers to a 2 layer encryption device. This a very rare term and would not be commonly know to anyone not in the computer programming field.
What is Hash file organization in DBMS?
Hashing is the most common form of purely random access to a file or database. It is also used to access columns that do not have an index as an optimisation technique. Hash functions calculate the address of the page in which the record is to be stored based on one or more fields in the record. The records in a hash file appear randomly distributed across the available space. It requires some hashing algorithm and the technique. Hashing Algorithm converts a primary key value into a record address. The most popular form of hashing is division hashing with chained overflow.
Explain the distinction between closed an open hashing discus the relative merits of each technique in database application?
Closed hashing involves storing all key-value pairs directly in the hash table, while open hashing involves using separate data structures (such as linked lists) to handle collisions. Closed hashing typically has better memory management and faster access times for non-colliding keys, while open hashing can handle a larger number of collisions without needing to resize the hash table. In database applications, closed hashing may be preferred for smaller datasets with minimal collisions, while open hashing may be more suitable for handling large volumes of data with frequent collisions.
What are the difference between static and dynamic hashing in DBMS?
Search operation in static hashing is time consuming, but in dynamic hashing it is not.
Difference between Internal hashing n external hashing?
Internal hashing mainly used for internal file, it is particularly an array of records. External hashing used for file disk
What is mean by PasswordUtils?
PasswordUtils is a fast, simple and lightweight utility class containing series of methods for creating, comparing, hashing, and random generating secure passwords to be stored on database or used for other purposes. It uses Java's latest built-in hashing algorithms and is independent of any other libraries.
Which is better encryption algorithm among DES Blowfish and MD5?
MD5 isn't a encryption algorithm, it's a hashing algorithm. Encryption will 'hide' the meaning of the encrypted text, while MD5 will 'add up' all the text to come up with a number. This number can be compared to another time this file was 'added up', to provide a simple kind of check to see if the text has been changed or if it is the same.
Explain the distinction between closed an open hashing Discuss the relative merits of each technique in database application?
A hash table is where data storage for a key-value pair is done by generating an index using a hash function. Open Hashing (aka Separate chaining) is simpler to implement, and more efficient for large records or sparse tables. Closed Hashing (aka Open Addressing) is more complex but can be more efficient, especially for small data records.
What is Homomorphic Hashing?
Homomorphic Hashing is a algorithm technique used for verifying data.
