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  2. Key size - Wikipedia

    en.wikipedia.org/wiki/Key_size

    In cryptography, key size or key length refers to the number of bits in a key used by a cryptographic algorithm (such as a cipher).. Key length defines the upper-bound on an algorithm's security (i.e. a logarithmic measure of the fastest known attack against an algorithm), because the security of all algorithms can be violated by brute-force attacks.

  3. Key (cryptography) - Wikipedia

    en.wikipedia.org/wiki/Key_(cryptography)

    Key size is the number of bits in the key defined by the algorithm. This size defines the upper bound of the cryptographic algorithm's security. [7] The larger the key size, the longer it will take before the key is compromised by a brute force attack.

  4. Key stretching - Wikipedia

    en.wikipedia.org/wiki/Key_stretching

    Key stretching also improves security in some real-world applications where the key length has been constrained, by mimicking a longer key length from the perspective of a brute-force attacker. [1] There are several ways to perform key stretching. One way is to apply a cryptographic hash function or a block cipher repeatedly in a loop.

  5. Public-key cryptography - Wikipedia

    en.wikipedia.org/wiki/Public-key_cryptography

    Public-key cryptography, or asymmetric cryptography, is the field of cryptographic systems that use pairs of related keys. ... or too short a key length, the chief ...

  6. RSA (cryptosystem) - Wikipedia

    en.wikipedia.org/wiki/RSA_(cryptosystem)

    Its length, usually expressed in bits, is the key length. ... Strong random number generation is important throughout every phase of public-key cryptography. For ...

  7. Triple DES - Wikipedia

    en.wikipedia.org/wiki/Triple_DES

    In cryptography, Triple DES (3DES or TDES), officially the Triple Data Encryption Algorithm (TDEA or Triple DEA), is a symmetric-key block cipher, which applies the DES cipher algorithm three times to each data block. The 56-bit key of the Data Encryption Standard (DES) is no longer considered adequate in the face of modern cryptanalytic ...

  8. Elliptic-curve cryptography - Wikipedia

    en.wikipedia.org/wiki/Elliptic-curve_cryptography

    The size of the elliptic curve, measured by the total number of discrete integer pairs satisfying the curve equation, determines the difficulty of the problem. The primary benefit promised by elliptic curve cryptography over alternatives such as RSA is a smaller key size, reducing storage and transmission requirements. [1]

  9. Elliptic Curve Digital Signature Algorithm - Wikipedia

    en.wikipedia.org/wiki/Elliptic_Curve_Digital...

    As with elliptic-curve cryptography in general, the bit size of the private key believed to be needed for ECDSA is about twice the size of the security level, in bits. [1] For example, at a security level of 80 bits—meaning an attacker requires a maximum of about 2 80 {\displaystyle 2^{80}} operations to find the private key—the size of an ...