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a computer system with a dedicated function within a larger mechanical or electrical system, often with real-time computing constraints.
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Questions related to the teaching and learning of cryptography.
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short-lived, like (for example) an ephemeral key, which is a key that only exists within the lifetime of a communication session.
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Something of mixed origin. In cryptography, typically a cipher system containing both public key and secret key component ciphers, where the public key system is used only to transport the key for the…
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the study of letters or groups of letters contained in a ciphertext in an attempt to partially reveal the message.
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the most important hardware component of a computer system, since it contains the circuitry necessary to interpret and execute instructions.
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Public-Key Cryptography Standard, number 8, describes the Private-Key Information Syntax Standard which is used to carry (encrypted or unencrypted) private certificate keypairs. See [RFC 5208](http://…
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Remote data checking protocols allow a client that has stored data at an untrusted server to efficiently verify that the server possesses the original data without retrieving it.
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Key rotation refers to a schedule or process for changing the key material.
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RFC 1320 — the MD4 message-digest algorithm — is a cryptographic hash function with a digest length is 128 bits, developed by Ronald Rivest in 1990.
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The Miyaguchi-Preneel scheme, based on a one-way compression function, was proposed around 1989 by Preneel, and independently by Miyaguchi.Ohta, and Iwata.
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so unimportant, that it isn't worth considering. For example, if a flaw in a cryptographic algorithm is considered to be negligible, it is insignificant to both the …
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Let $\Omega$ be a set of entities. An *access structure* $\mathcal{A}$ is a collection of nonempty subsets of the power set $P(\mathcal{A})$. This structure is called *monotone*, if $A\in\mathcal{A}$ …
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a 64-bit block cipher developed by the U.S. National Security Agency (NSA).
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Secure/Multipurpose Internet Mail Extensions, or short S-MIME, is a standard for public key encryption and signing of MIME data.
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A family of lightweight symmetric block-ciphers designed for good performance in constrained software devices with block sizes ranging from 32 to 128 bits and key sizes ranging from 64 to 256 bits.
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Encryption of data represented in XML according to the W3C Specification.
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a technology that allows telephone calls to be made over computer networks like the Internet.
a VPN tunneling protocol that allows the tunneling of PPP or L2TP traffic over an SSL connection.
A family of tweakable symmetric block-cipher algorithms with 256, 512 and 1024 bit block and key sizes.
the process of breaking a stream of text up into words, phrases, symbols, or other meaningful elements called tokens.
Traitor tracing describes an ability of specific cryptographic schemes that helps trace the source of leaks.
a useful primitive that allows a client to hide its data access patterns from an untrusted server in storage outsourcing applications.
a variation of the McEliece Cryptosystem and is equivalent to McEliece from a security point of view, but encryption using Niederreiter is about ten times faster than …
a Password Based Key Derivation Function, which can be used to derive key data or derive a "password hash" from a salt and password.
RFC 1319 — The MD2 Message-Digest Algorithm is a cryptographic hash function which is no longer considered secure.
a 128-bit block cipher with variable key size of between 128 and 448 bits. It has a heterogeneous structure: several rounds of a cryptographic core are “jacketed” by un-keyed mixing rounds, to…
a 128-bit block cipher, formerly an AES candidate, that makes heavy use of data-dependent rotations.
a variant of RSA, meant to increase the RSA public modulus size while keeping computation cost moderate.
SHA-3 Competition (2007-2012) was a competition initiated by NIST as a call for a new cryptographic hash algorithm for standardization purposes.