Public-key cryptography

An unpredictable (typically large and random) number is used to begin generation of an acceptable pair of keys suitable for use by an asymmetric key algorithm. In an asymmetric key encryption scheme, anyone can encrypt messages using the public key, but only the holder of the paired private key can decrypt. Security depends on the secrecy of the private key. In the Diffie–Hellman key exchange scheme, each party generates a public/private key pair and distributes the public key. Public-key cryptography, also known as asymmetric cryptography, is a class of cryptographic algorithms which requires two separate keys, one of which is secret (or private) and one of which is public. Public-key algorithms are based on mathematical problems which currently admit no efficient solution that are inherent in certain integer factorization, discrete logarithm, and elliptic curve relationships. Message authentication involves processing a message with a private key to produce a digital signature. Related: Technology

VeraCrypt - Home Extended Validation Certificate Certificate for HTTPS websites and software An Extended Validation Certificate (EV) is a certificate conforming to X.509 that proves the legal entity of the owner and is signed by a certificate authority key that can issue EV certificates. EV certificates can be used in the same manner as any other X.509 certificates, including securing web communications with HTTPS and signing software and documents. Unlike domain-validated certificates and organization-validation certificates, EV certificates can be issued only by a subset of certificate authorities (CAs) and require verification of the requesting entity's legal identity before certificate issuance. As of February 2021, all major web browsers (Google Chrome, Mozilla Firefox, Microsoft Edge and Apple Safari) have menus which show the EV status of the certificate and the verified legal identity of EV certificates. Introduction by CA/Browser Forum [edit] Creation of special UI indicators in browsers Removal of special UI indicators

Certificate Authority Enabling Communications, Anywhere, Anytime: Arduino Yun as a possible Mesh Extender Platform Regular readers of this blog will know that we have been looking at a variety of hardware options for the Serval Mesh Extender. The Serval Mesh Extender is a device that combines ad-hoc WiFi meshing with long-range license-free UHF packet radio to allow the easy formation of mesh networks spanning useful distances. Typically the UHF packet radio has a range about ten times greater than WiFi. This means that in ordinary suburban and urban areas we get a range of a block or two, and in open rural areas the range can be in the kilometres. We run our award winning Serval Mesh software over the top, providing an easy to use communications system that lets you use your cell phone without cellular coverage, for example, during a disaster, or when you and your friends are near one another outside of the range of your native network. For example, if you are at an international gathering and don't want to pay $4 a minute for the privilege of calling someone a few hundred metres away.

Certificate Transparency System of public logs of digital certificates Certificate Transparency (CT) is an Internet security standard for monitoring and auditing the issuance of digital certificates.[1] When an internet user interacts with a website, a trusted third party is needed to assure the user that the website is legitimate and that the website's encryption key is valid. This third party, called a certificate authority (CA), will issue a certificate for the website that the user can validate. The security of encrypted internet traffic (HTTPS) depends on the trust that certificates are only given out by the certificate authority and that the certificate authority has not been compromised. Certificate Transparency makes public all issued certificates, giving website owners and auditors the ability to detect and expose inappropriately issued certificates. The certificate transparency system consists of a system of append-only certificate logs. Finally, a CA may decide to log the final certificate as well.

Secret Key Cryptography DHT Protocol | twister Loren Kohnfelder From Wikipedia, the free encyclopedia Computer scientist Loren Kohnfelder is a computer scientist working in public key cryptography. Kohnfelder invented what is today called public key infrastructure (PKI) in his May 1978 MIT S.B.