A value generated by applying some sort of mathematical function to a file. If even a single bit of the file changes, the checksum this function generates should be completely different. Checksums are used to verify the integrity of a file when it is being exchanged over insecure networks.
A number that is calculated based on the values of a block of data. Checksums are used in communication to ensure that the correct data was received.
Blocks created during tape backup for error recovery.
A special calculation applied to a piece of information. If the information is transmitted and the calculation achieves the same result, then the transmission was successful.
(IEEE) A sum obtained by adding the digits in a numeral, or group of numerals [a file], usually without regard to meaning, position, or significance. See: check summation.
The sum of a group of data items associated with the group for checking purposes.
A method of providing information for error detection, usually calculated by summing a set of values. The checksum is usually appended to the end of the data that it is calculated from, so that data and checksum can be compared.
Used in error detection, a checksum is a computation done on a message and transmitted with the message to ensure the integrity of the message. A parity bit is one example of a checksum. A message digest is another example.
This is a single byte sum of all the bytes in a record (either disk I/O or cassette I/O). For cassette I/O, this includes addition of the two marker characters, computed with end-around carry.
Method of verification used by the computer to ensure that transmitted data are free of errors. The computer sending the information sends a checksum on the unit of data sent; the receiving computer verifies the checksum against the data received to see if it arrives at the same figure. If so, the data have transmitted properly.
A calculated value that is used to test data integrity. Errors can occur when data is transmitted or when it is written to disk. One means of detecting such errors is the use of a checksum. A value is calculated for a given chunk of data by sequentially combining all the bytes of data with a series of arithmetic or logical operations. After the data is transmitted or stored, a new checksum is calculated and compared with the original one. If the checksums match, the transmission or storage was probably error free. If they do not match, an error occurred.
A mathematical calculation applied to the contents of a packet before and after it is sent. If the "before" calculation does not match the "after" calculation, there were errors in the transmission.
An integer value computed from a sequence of octets in a packet and compared for verification. A checksum detects errors that can result when a packet is in transit.
Method for checking the integrity of transmitted data. A checksum is an integer value computed from a sequence of octets taken through a series of arithmetic operations. The value is recomputed at the receiving end and compared for verification.
This is a value that is calculated from a group of data, and often passed along with the data when it is transferred. The receiver of the data will compare it to the checksum, and if it doesn't match, they know the data was corrupted in transit. Checksums are used in all types of data communication, such as reading data from hard drives, CDs, floppies, modem communications, and networking.
A method for checking the integrity of transmitted data. A checksum is an integer value computed from a sequence of octets by treating them as integers and computing the sum. The value is recomputed at the receiving end and compared for verification.
A calculated value based on the contents of a packet's header and data informa- tion. A checksum is used to verify that the packet contents have not been corrupted by memory or data bus errors within routers on the internet.
a digit representing the sum of the digits in an instance of digital data; used to check whether errors have occurred in transmission or storage
a computed value that depends on the contents of a block of data and is transmitted or stored along with the data in order to detect corruption of the data upon recall
a count of bits done for comparison purposes
a count of the number of bits in a transmission unit that ensures integrity is maintained
a count of the number of bits in a transmission unit that is included with the unit so that the receiver can check to see whether the same number of bits arrived
a device used to establish the integrity of data
a form of a very simple measure for protecting the integrity of data from both hackers (read as crackers) and data transmission error over network i
a form of redundancy check, a very simple measure for protecting the integrity of data by detecting errors in data that is sent through space (telecommunications)
a function that is calculated over an input to determine if that input has been corrupted
a mathematical function that will change if even one byte of the file changes
a method frequently used to determine if data has been changed, and involves summing all of the bits in a file
a number calculated from the contents of a file
a number calculated from the contents of the file that will change if the file is changed
a number calculated on data that is designed to detect changes to the data
a number generated by adding up all the data in the file you want to check
a number that allows the receiving TCP to detect error s in the packets
a number that is computed from the contents of a data block
a short extra piece of data kept in addition to the file itself which is the sum (or some other simple function) of all values in the file that is used to detect unintended changes to a program (e
a simple error-detection scheme in which each transmitted message that results in a numerical value based on the value of the bytes in a message
a small number or code made from a larger number or message
a standard mathematical calculation applied against the entire message before the message is encrypted
a string of letters and numbers that's a function of the content of a message (before the message is sent, of course)
a summary calculation by the modem of the data being sent
a unique number, usually created by totaling all of the values in a particular column in the data
a value computed by adding together all the numbers in the input data
a value that is created by adding the read bytes into a sum
a value used to determine if a block of data has changed
a very basic form of error checking
a very simplistic hash function
Special data word stored in the last ROM location. It is derived from the addition of all other data words in the ROM, and is used for error-checking purposes.
Numeric value used to verify the integrity of a block of data. The value is computed using a checksum procedure. A crypto checksum incorporates secret information in the checksum procedure so that it can't be reproduced by third parties that don't know the secret information.
A simple method of checking errors in data. Can also be used as a binary "signature" to identify programs.
a count of the number of bits in a transmission unit (such as an attachment). It is included with the unit so that the receiver can check that the same number of bits arrived and tell whether the complete transmission was received (also known as hashing).
A value which is the result of adding specific binary values. A checksum is often used to verify the integrity of a sequence of binary numbers.
Is a very simple measure for protecting the integrity of data by adding up the basic components of a message or file and storing the resulting value. Once the data has been received this value can be checked to make sure the data hasnâ€(tm)t been altered. It can also be used to identify known data quickly.
An computerized value at the end of a block of data corresponding to the sum of all information in the block. It is used to detect errors and data corruption.
A method for detecting transmission errors in packets. TCP, IP and UDP checksums are a simple 16 bit ones-complement sum of the packet header and/or data. No error correction is attempted, corrupted packets are silently discarded.
A value that is computed by a function that is dependent on the contents of a data object and is stored or transmitted together with the object, for the purpose of detecting changes in the data.
An algorithm-based method of determining the integrity and authenticity of a digital data object. Used to check whether errors or alterations have occurred during the transmission or storage of a data object.
An error-detecting code based on a summation operation performed on the bits to be checked. A much better authentication method is called the cyclic redundancy check.
A count of the number of bits in a message. If the count matches a checksum on a remote server that tracks spam checksums, the message may be spam. trimMail Inbox consults a variety of these servers, and adds their input to the message's score.
A number of bits that is transmitted with data so that the receiving device can verify the accuracy of the data that it received. If the number of bits that arrives is the same that is sent, the transmission is believed to be complete.
A number produced by an algorithm designed to establish whether errors have been introduced into a data stream.
A short piece of data that is added to a message so that the receiver can check to see if the message was distorted during transmission. Alternatively, to generate the checksum. The Oracle Security Server uses the MD5 algorithm to generate a hash value that is used as a checksum.
Value of addition of all the bytes in the data.
An alphanumeric error detection method used in many bar code symbologies for information security.
A Value which depends on the content of a digital object, intended to be used to verify its integrity
A form of checking data integrity for any defined block of data. This is often used by manufacturers to prevent editing of mobile phone firmware. Example would be the above text which has an MD5 Checksum of: 89E0A688069790AB6CFF50D01D86E630.
Two bytes are reserved for a cyclic redundancy check in l2bin Model File s, but the checksum is currently set to the constant 0.
A block check character that is formed by taking the sum of the binary data transmitted.
A calculated value used to test data for the presence of errors that can occur when data is transmitted or when it is written to disk.
An integer value given to each sequence file created with Wisconsin Package editors or programs. Programs check this value each time a sequence file is used as input. It is a check against the corruption of the sequence data. For more information, see Chapter 2, Using Sequences.
This is the sum of a group of data items that is used for error checking. Received information packets must have the same number of bits present during the initial transmission.
An identifying number calculated from file characteristics. The slightest change in a file changes its checksum.
programming: A simple kind of error-checking that adds up the bits in a piece of information, divides by some number, and checks the remainder.
A one byte entity for error detection, which is computed by transmitter and appended to the Message, and is computed by the receiver and compared to the sent checksum for basic error detection. Only one checksum is used per SDM or MDM message.
(also called Hash) A count of the number of bits in a transmission unit so that the recipient can make sure the correct number of bits arrived and that the message is intact. See SHA-1, Cryptography.
A computed value which is dependent upon the contents of a packet. This value is sent along with the packet when it is transmitted. The receiving system computes a new checksum based upon the received data and compares this value with the one sent with the packet. If the two values are the same, the receiver has a high degree of confidence that the data was received correctly.
Entry at the end of a block of data corresponding to the binary sum of all information in the block. Used in error checking procedures.
An encoded number calculated from the other information supplied with a PAK. The checksum string always begins with the number 1, which is the only number in the string. The other 16 characters are always alphabetic characters from A through P.
A value calculated by applying a specific algorithm to a file or datagram. The algorithm is design so that even a single bit change in the source file/ data causes a completely different check sum value. Check sums are of fixed length (32 bits for CRC32, 128 bits for MD5, etc.) regardless of the size of the file or datagram they are applied to. See CRC.
The checksum of the file. If the value is blank, the checksum attribute is removed. If no value is specified, the command computes a value, according to the format given in the sum command. The value is the output of the sum -r command, including spaces.
An alphanumeric error detection method used in many barcode symbologies for information integrity.
The sum of a group of data items used for error checking. If the checksum received equals the one sent, all is well. Otherwise, the receiving equipment requests the data be sent again.
A value that accompanies data transferred from one place to another and helps to ensure that the data was transferred correctly.
A checksum is a special byte that the computer uses after talking to something to make sure it understood what was said correctly.
A code added to the contents of a block of data stored on an RFID microchip that can be checked before and after data is transmitted from the tag to the reader to determine whether the data has been corrupted or lost. The cyclic redundancy check is one form of checksum.
A numerical check value calculated from a larger set of data. A checksum is most often used when sending a packet of data over a network or other communications channel. One checksum formula is a simple addition, with overflow ignored, wherein the bytes of the packet are added together into a variable of a fixed size/width (say, 16 bits) as they are sent. The checksum is typically sent at the end of the packet and used at the receiving end to confirm the integrity of the preceding data. See also Internet checksum. [ more
Used in error detection, a checksum is a computation done on the message and transmitted with the message; similar to using parity bits.