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HMAC-SHA1 generation. In cryptography, an HMAC (sometimes expanded as either keyed-hash message authentication code or hash-based message authentication code) is a specific type of message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key.
HMAC-based one-time password (HOTP) is a one-time password (OTP) algorithm based on HMAC. It is a cornerstone of the Initiative for Open Authentication (OATH). HOTP was published as an informational IETF RFC 4226 in December 2005, documenting the algorithm along with a Java implementation. Since then, the algorithm has been adopted by many ...
The iPhone 7 and iPhone 7 Plus [a] are smartphones that were developed and marketed by Apple Inc. They are the tenth generation of the iPhone.They were announced on September 7, 2016, at the Bill Graham Civic Auditorium in San Francisco by Apple CEO Tim Cook, and were released on September 16, 2016, succeeding the iPhone 6, iPhone 6 Plus, iPhone 6S and iPhone 6S Plus as the flagship devices in ...
The simplest such pairwise independent hash function is defined by the random key, key = (a, b), and the MAC tag for a message m is computed as tag = (am + b) mod p, where p is prime. More generally, k -independent hashing functions provide a secure message authentication code as long as the key is used less than k times for k -ways independent ...
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The rear cameras on the 7 and 7 Plus both have an f / 1.8 aperture, as compared to f / 2.2 on the iPhones 6 and 6 Plus, though the 7 Plus' tele camera has f / 2.8 and is not optically stabilized. [26] [64] It also has a brighter quad-LED True Tone flash The 2017 iPhone 8 camera features a larger sensor and a newer color filter.
The digital key specification for cars is maintained by the Car Connectivity Consortium. [6] As of 2023, most implementations of the technology follow the Digital Key 2.0 standard. The first automobile to follow the Digital Key 3.0 standard was the BMW iX. [7] Manufacturers can set limits on how many devices a key can be shared with.
HKDF-Extract takes "input key material" (IKM) such as a shared secret generated using Diffie-Hellman, and an optional salt, and generates a cryptographic key called the PRK ("pseudorandom key"). This acts as a "randomness extractor", taking a potentially non-uniform value of high min-entropy and generating a value indistinguishable from a ...