#inasec

[ifelten]

Stregbredpande (Thymelicus lineola)

Essex/European Skipper (Thymelicus lineola)

[inasecrequeza]

Cryptography or cryptology  is the practice and study of techniques for secure communication in the presence of third parties called adversaries.[2]More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages;various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiationare central to modern cryptography. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, and electrical engineering. Applications of cryptography include military communications, electronic commerce, ATM cards, and computer passwords.

Cryptography prior to the modern age was effectively synonymous with encryption, the conversion of information from a readable state to apparent nonsense. The originator of an encrypted message (Alice) shared the decoding technique needed to recover the original information only with intended recipients (Bob), thereby precluding unwanted persons (Eve) from doing the same. The cryptography literature often uses Alice ("A") for the sender, Bob ("B") for the intended recipient, and Eve ("eavesdropper") for the adversary.[5] Since the development of rotor cipher machines in World War I and the advent of computers in World War II, the methods used to carry out cryptology have become increasingly complex and its application more widespread.

Modern cryptography is heavily based on mathematical theory and computer science practice; cryptographic algorithms are designed around computational hardness assumptions, making such algorithms hard to break in practice by any adversary. It is theoretically possible to break such a system, but it is infeasible to do so by any known practical means. These schemes are therefore termed computationally secure; theoretical advances, e.g., improvements in integer factorization algorithms, and faster computing technology require these solutions to be continually adapted. There exist information-theoretically secure schemes that provably cannot be broken even with unlimited computing power—an example is the one-time pad—but these schemes are more difficult to implement than the best theoretically breakable but computationally secure mechanisms.

The growth of cryptographic technology has raised a number of legal issues in the information age. Cryptography's potential for use as a tool for espionage and sedition has led many governments to classify it as a weapon and to limit or even prohibit its use and export.In some jurisdictions where the use of cryptography is legal, laws permit investigators to compel the disclosure of encryption keys for documents relevant to an investigation. Cryptography also plays a major role in digital rights management and copyright infringement of digital media.

Until modern times, cryptography referred almost exclusively to encryption, which is the process of converting ordinary information (called plaintext) into unintelligible text (called ciphertext).[ Decryption is the reverse, in other words, moving from the unintelligible ciphertext back to plaintext. A cipher (or cypher) is a pair of algorithms that create the encryption and the reversing decryption. The detailed operation of a cipher is controlled both by the algorithm and in each instance by a "key". The key is a secret (ideally known only to the communicants), usually a short string of characters, which is needed to decrypt the ciphertext. Formally, a "cryptosystem" is the ordered list of elements of finite possible plaintexts, finite possible cyphertexts, finite possible keys, and the encryption and decryption algorithms which correspond to each key. Keys are important both formally and in actual practice, as ciphers without variable keys can be trivially broken with only the knowledge of the cipher used and are therefore useless (or even counter-productive) for most purposes. Historically, ciphers were often used directly for encryption or decryption without additional procedures such as authentication or integrity checks. There are two kinds of cryptosystems: symmetric and asymmetric. In symmetric systems the same key (the secret key) is used to encrypt and decrypt a message. Data manipulation in symmetric systems is faster than asymmetric systems as they generally use shorter key lengths. Asymmetric systems use a public key to encrypt a message and a private key to decrypt it. Use of asymmetric systems enhances the security of communication.Examples of asymmetric systems include RSA (Rivest-Shamir-Adleman), and ECC (Elliptic Curve Cryptography). Symmetric models include the commonly used AES (Advanced Encryption Standard) which replaced the older DES (Data Encryption Standard).

In colloquial use, the term "code" is often used to mean any method of encryption or concealment of meaning. However, in cryptography, code has a more specific meaning. It means the replacement of a unit of plaintext (i.e., a meaningful word or phrase) with a code word (for example, "wallaby" replaces "attack at dawn").

Cryptanalysis is the term used for the study of methods for obtaining the meaning of encrypted information without access to the key normally required to do so; i.e., it is the study of how to crack encryption algorithms or their implementations.

Some use the terms cryptography and cryptology interchangeably in English, while others (including US military practice generally) use cryptography to refer specifically to the use and practice of cryptographic techniques and cryptology to refer to the combined study of cryptography and cryptanalysis. English is more flexible than several other languages in which cryptology (done by cryptologists) is always used in the second sense above. RFC 2828 advises that steganography is sometimes included in cryptology.

The study of characteristics of languages that have some application in cryptography or cryptology (e.g. frequency data, letter combinations, universal patterns, etc.) is called cryptolinguistics.

[mrrain30-blog]

Types of virus

I learned the different types of virus like trojan worm spyware malware now that i know the different kind of virus I can now protect myself from viruses and help others from virus. 

[inasecdelasalle]

Malicious Software

There are many ways on how you can harm a computer, the common are making viruses there are many kinds of virus in computer like worms, worms happen in network like by sending a file to your email or computer which this malicious software can do so much damage to our computer especially if you are working in company or organization it can affect your job. So what if we know all this malicious software or how can someone harm your computer? Know this things can avoid getting this things preventing the attacks from your computer and if someone experience it and they don’t know how they will deal to this things because they aren’t knowledgeable about this things then we can help them. We can apply this in many way especially if we work on organization or company this things happen commonly we can prevent this things that will affect the organization or company.

[mrrain30-blog]

Hacker

The things I learned in inasec is the 7 type of hackers  script Kiddie, White Hat, Black Hat, Gray Hat, Green Hat, Red Hat ,Blue Hat.Now that I learned all types of hackers  I have a idea what they do and what they are after so I can defend and protect my device from a attack.

[inasecdelasalle]

Code of Ethics

I’ve learned that in Information Assurance and Security the Code of Ethics was it is guide of principles that designed for professionals to conduct their business or work ethically this code of ethics can also distinguish the ethical values of a company or organization. So what? the code of ethics guide us this will reflect the professionalism of a person without this code we can’t distinguish the values of a company and organization so with this code we can describe the values of a company or organization also the us. Know the code of ethics we need to apply to our self so that when we encounter things will help us in decision making and to avoid the not ethical doings in our field.

[thekingmilo]

Almost time for a NEW 💧! HENNY SEASON ALMOST OVER! SPRING FOR MY HAMS I GOT SUMN FOR YOU! PEACE PEACE ✌🏽 💎💤 @brontenow : 📽💰📽💰 #vscocam #raindrop #newmusic #inasec #litty #nomoretime #tripleZ #napsquad

[alejandrojauregui]

Instant frame #inasec