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  2. Padding (cryptography) - Wikipedia

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

    For example, a message of 23 bits that is padded with 9 bits in order to fill a 32-bit block: ... | 1011 1001 1101 0100 0010 0111 0000 0000 | This padding is the first step of a two-step padding scheme used in many hash functions including MD5 and SHA. In this context, it is specified by RFC1321 step 3.1.

  3. Data structure alignment - Wikipedia

    en.wikipedia.org/wiki/Data_structure_alignment

    A memory address a is said to be n-byte aligned when a is a multiple of n (where n is a power of 2). In this context, a byte is the smallest unit of memory access, i.e. each memory address specifies a different byte.

  4. struct (C programming language) - Wikipedia

    en.wikipedia.org/wiki/Struct_(C_programming...

    In the C programming language, struct is the keyword used to define a composite, a.k.a. record, data type – a named set of values that occupy a block of memory. It allows for the different values to be accessed via a single identifier, often a pointer. A struct can contain other data types so is used for mixed-data-type records.

  5. Data structure - Wikipedia

    en.wikipedia.org/wiki/Data_structure

    A data structure known as a hash table.. In computer science, a data structure is a data organization and storage format that is usually chosen for efficient access to data. [1] [2] [3] More precisely, a data structure is a collection of data values, the relationships among them, and the functions or operations that can be applied to the data, [4] i.e., it is an algebraic structure about data.

  6. Block cipher mode of operation - Wikipedia

    en.wikipedia.org/wiki/Block_cipher_mode_of_operation

    In the specification of the CFB mode below, each plaintext segment (Pj) and ciphertext segment (Cj) consists of s bits. The value of s is sometimes incorporated into the name of the mode, e.g., the 1-bit CFB mode, the 8-bit CFB mode, the 64-bit CFB mode, or the 128-bit CFB mode. These modes will truncate the output of the underlying block cipher.

  7. Ascon (cipher) - Wikipedia

    en.wikipedia.org/wiki/Ascon_(cipher)

    The data in both A and P is padded with a single bit with the value of 1 and a number of zeros to the nearest multiple of r bits. As an exception, if A is an empty string, there is no padding at all. As an exception, if A is an empty string, there is no padding at all.

  8. IPv6 packet - Wikipedia

    en.wikipedia.org/wiki/IPv6_packet

    An optional feature of IPv6, the jumbo payload option in a Hop-By-Hop Options extension header, [8] allows the exchange of packets with payloads of up to one octet less than 4 GB (2 32 − 1 = 4 294 967 295 octets), by making use of a 32-bit length field. Packets with such payloads are called jumbograms.

  9. List of Java bytecode instructions - Wikipedia

    en.wikipedia.org/wiki/List_of_Java_bytecode...

    load the int value 3 onto the stack iconst_4 07 0000 0111 → 4 load the int value 4 onto the stack iconst_5 08 0000 1000 → 5 load the int value 5 onto the stack idiv 6c 0110 1100 value1, value2 → result divide two integers if_acmpeq a5 1010 0101 2: branchbyte1, branchbyte2 value1, value2 →