In cryptography, a weak key is a key, which, used with a specific cipher, makes the cipher behave in some undesirable way. Weak keys usually represent a very small fraction of the overall keyspace, which usually means that, a cipher key made by random number generation is very unlikely to give rise to a security problem. Nevertheless, it is considered desirable for a cipher to have no weak keys. A cipher with no weak keys is said to have a flat, or linear, key space.
In cryptography, a weakkey is a key, which, used with a specific cipher, makes the cipher behave in some undesirable way. Weakkeys usually represent...
The very simple key schedule makes IDEA subject to a class of weakkeys; some keys containing a large number of 0 bits produce weak encryption. These...
weak RSA key pairs that allowed private keys to be inferred from public keys. As a result, all systems depending upon the privacy of such weakkeys are...
relational database, a weak entity is an entity that cannot be uniquely identified by its attributes alone; therefore, it must use a foreign key in conjunction...
In cryptography, key stretching techniques are used to make a possibly weakkey, typically a password or passphrase, more secure against a brute-force...
to TDES cipher. DES also has four so-called weakkeys. Encryption (E) and decryption (D) under a weakkey have the same effect (see involution): E K (...
different key and block sizes. For AES, NIST selected three members of the Rijndael family, each with a block size of 128 bits, but three different key lengths:...
companies, were affected by the Infineon weakkey vulnerability, leaving their private keys deducible to attackers. Key partners of Gemalto include Wipro, Prodapt...
above, such that n=2k-1, where k is the block size. They also found large weakkey classes for the Challenge variant, and for many other moduli. David M'Raïhi;...
the same plaintext is encrypted multiple times independently with the same key. Block ciphers may be capable of operating on more than one block size, but...
the cipher key called a round key. A key schedule is an algorithm that calculates all the round keys from the key. Some ciphers have simple key schedules...
Standard. Wagner et al. (1999) found a number of weakkey classes for FROG. Other problems included very slow key setup and relatively slow encryption. FROG...
applications that use RC4 simply concatenate key and nonce; RC4's weakkey schedule then gives rise to related-key attacks, like the Fluhrer, Mantin and Shamir...
a "public key" to encrypt a message and a related "private key" to decrypt it. The advantage of asymmetric systems is that the public key can be freely...
attempt to prevent use of any of these remaining weakkeys, but researchers continue to find weakkey implementations. In December 2010, a group calling...
key. When one round key has been deemed a potential round key considerably more often than any other key, it is assumed to be the correct round key....
and electronic commerce. Cryptographer Encryption/decryption Cryptographic key Cipher Ciphertext Plaintext Code Tabula recta Alice and Bob Commitment schemes...
the key. While the number of '1' bits alone is not nearly enough information to make finding the key easy, repeated executions with the same key and different...
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...
CCM must be carefully chosen to never be used more than once for a given key. This is because CCM is a derivation of counter (CTR) mode and the latter...
results for XTEA. The paper presents two attacks, one without and with a weakkey assumption, which corresponds to 264.98 bytes of data and 2126.44 operations...
even involve algorithm at all, for example, if the key is generated from a password, guessing a weak password is easy and does not depend on the strength...
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