Bcrypt Step by Step

Bcrypt Step by Step

Bcrypt is a key derivation function, which can be thought of as a slow hash function. Its purpose is to slowly convert a piece of input data to a fixed-size, deterministic, and unpredictable output. A common use-case is to convert a password into an n-bit cryptographic key, which can then be used for safe authentication. … Read more

Shamir’s Secret Sharing Step-By-Step

Shamir's Secret Sharing Step By Step Library

Adi Shamir’s Secret Sharing is a cryptographic algorithm that allows distinct parties to jointly share ownership of a single secret by holding shares. The original secret can only be reconstructed by using a minimum number of shares, which allows different parties to cooperate without the need to fully trust one another. Example Problem To illustrate, … Read more

(Very) Basic Intro to PGP (GPG)

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PGP, or its open-source alternative, GPG, is a program used to encrypt data such that only an authorized party can decrypt it. In this introduction, we will cover its use-cases and a high-level overview of the algorithms involved. Both programs (and others) adhere to the OpenPGP protocol. Because it is an implementation agnostic protocol, people … Read more

AES-256 Cipher – Python Cryptography Examples

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Need to encrypt some text with a password or private key in Python? AES-256 is a solid symmetric cipher that is commonly used to encrypt data for oneself. In other words, the same person who is encrypting the data is typically decrypting it as well (think password manager). Dependencies For this tutorial, we will be … Read more

Will Banning Cryptography Keep the Country Safe?

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Politicians in the United States have been claiming recently that end-to-end encryption is certainly too dangerous to permit. This movement is serious. Congress even introduced a bill that would remove the protections that we currently have that allow us to legally encrypt information. Lindsey Graham is one such proponent of this restrictive legislation: Senator Lindsey … Read more

Why is Exclusive Or (XOR) Important in Cryptography?

Why is Exclusive Or (XOR) Important in Cryptography

If you are getting into cryptography, or just trying to understand the fundamentals, you may have noticed that the exclusive-or (XOR) operation is used quite often, especially in ciphers. XOR is a simple bitwise operation that allows cryptographers to create strong encryption systems, and consequently is a fundamental building block of practically all modern ciphers. … Read more

(Very) Basic Intro to The AES-256 Cipher

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AES stands for “Advanced Encryption Standard” and is a specification that has selected the Rijndael cipher as its symmetric key ciphering algorithm. AES encrypts a message with a private key and no one except the key holder can decrypt the message. This is useful for many reasons, but a good example is a laptop that … Read more

Stop with the Obfuscation: Encoding and Encryption are Not the Same

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This is a topic that has been talked about quite a bit, but I think it’s an important one to reiterate to our users. Encoding is not Encryption! Encryption is a specific subset of encoding where the encoded messages can only be accessed by authorized parties (the ones holding the decryption keys). Encoding is simply … Read more

Dual Encryption

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Qvault’s dual encryption allows users to require that two keys are needed to unlock their vault. A password, and a key card. You have probably heard of two factor authentication. According to Authy: 2FA is an extra layer of security used to make sure that people trying to gain access to an online account are who they … Read more