Recognize different from the hash and encryption systems


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in this tutorial we will see the different hashing and encryption systems. Introduction To understand the difference between hash algorithms (MD5, SHA1 ..) and encryption algorithms (also called "encryption"), we must understand this: hash algorithms such as MD5 or SHA-1 are irreversible, so it is theoretically impossible perform a reversing operation (is to use the algorithm in the opposite direction, to spend a ciphertext in plain text). As for the encryption algorithms are readable with key (s) / or keyless (depending on the algorithm). The MD5 Hash algorithms: has 32 characters based on the sequence (or default) as hexadecimal [a- zA-Z0-9]. SHA1 :. same sequence but the 40 character MD5 basic cryptographic algorithms 64: is not without a specific length limit in the effect that the decimal system (base 10), binary (base 2), octal (base 8) or hexadecimal (base 16) can reach a very long length (depending on the chain originally requested). It is based on a standard of 63 characters, such as [A-Za-Z0-9 + /] and an additional character (stuffing), to meet the "=". ON: has 13 characters and uses. many characters (letters, slashes,) Despite the large number of characters used in this algorithm, some channels may be comprised of letters and numbers. Morse: consisting only of "." and "-" Each character is converted into a sequence of "." and "-". ROT13: this is a Caesar worksheet variant is a very simple algorithm to encrypt text. As its name suggests, is a change of 13 characters each letter of the text to encrypt. The advantage of ROT13, is the fact that the displacement is 13: As the alphabet comprises 26 letters of the same "algorithm" is used for both encrypting and decrypting. It is still used in messaging software, or in a forum, we want to hide an answer to a question posed. ROT47: this is a variant of ROT13 to encrypt the letters, numbers and other special characters. ROT47 is based on the ASCII code, which assigns each a number symbol. It uses numbers in the range 33-126, like an exclamation point ( "!") And the symbol tilde ( "~"). Then, according to the same principle as the ROT13, which rotates 47 letters. The use of more than ROT13 symbols will allow more efficient interference. For other algorithms, such as atom-128, megan35 the operation is similar to the base64, except for some features that are not always present (for example, "+" in the atom-128 that was added but uses similar Base64 encoding ) Decrypt,? break, Guess Base64, walrus and other figures without keys are easily reversible using adapted tools, for example through this website. oF: it is a symmetric key encryption with the possible attack methods are cryptanalysis differential, the attack-T (Tickling attack), linear cryptanalysis, the exchange of space-time. MD5, SHA-1 hash algorithms are, in other words, to obtain a mark of a character string (file is considered as a string), so it is usually impossible to obtain an identical footprint for two different channels (possible given the maximum character length). Knowing this, to find the source string of printing, there are several techniques here are the three most commonly used: 1. The "rainbow tables" A data structure to retrieve a password of your brand. Benefit: Saves time when using a password known and therefore this Cons table: Efficacy of tables significantly decreases when the hash function is combined with salt, salt ( "salt") is a concatenated string with the password before encryption. This salting operation makes it almost impossible to find through a rainbow chain table. 2. The brute force attack (brute-force) Allows from a pseudo-generation tool, test all possibilities reusing the algorithm used to find the same footprint. Advantages: Ensuring a result, possibility of using brute-force distributed by synchronizing multiple machines to perform the delegated task manner. Cons: power memory time commitment, EDF will thank you, in fact, this technique can work for days or even years to find the right chain. 3. "Cloud Attackers" These sites offer a service algorithmic cracks your fingerprints, using Rainbow Tables is the brute force, they arrange for you to find the chain behind your footprint. Advantages: Energy saving, time and therefore money, more commitment memory. Cons:. results not guaranteed, possible quotas Some are paid as they guarantee you a result, others are open to the public without registration or payment here is a non-exhaustive list: .uk If in a situation, you can not distinguish an encryption algorithm, you can try using a tool dedicated to this, nommeCodeDetective it, it is available as open source on Github platform, I suggest you take a look at the sources of its use is very simple: python <the result of something key> 'Now I give you a link that will allow you to identify hash on a website based on (links to those who do not know hashtag. py python: tutorial) website: identification hash http: / /
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