Top "Checksum" questions

A checksum or hash sum is a fixed-size datum computed from an arbitrary block of digital data for the purpose of detecting accidental errors that may have been introduced during its transmission or storage.

IP header checksum: 0x0000

I have a JAX-RS web service which is secured via TLS. Hence encryption is very important I decided to check …

networking header ip checksum traffic
CRC32 checksum in Python with hex input

I'm wanting to calculate the CRC32 checksum of a string of hex values in python. I found zlib.crc32(data) …

python string hex checksum crc32
How do I check if a string is a valid md5 or sha1 checksum string

I don't want to calculate a file's checksum, just to know if a given string is a valid checksum

java md5 sha1 checksum
Calculating FCS(CRC) for HDLC frame

I have the following frame: 7e 01 00 00 01 00 18 ef 00 00 00 b5 20 c1 05 10 02 71 2e 1a c2 05 10 01 71 00 6e 87 02 00 01 42 71 2e 1a 01 96 27 be 27 54 17 3d b9 93 ac 7e …

serial-port frame checksum crc
Can rsync verify contents before syncing

Can Rsync be configured to verify the contents of the file before they are being synced. I have heard about …

linux file checksum rsync
C Programming TCP Checksum

I have been having trouble doing the checksum for TCP for several days now. I have looked at many sources …

c tcp checksum raw-sockets
How reliable is the adler32 checksum?

I wonder how reliable the adler32 checksum is, compared to e.g. md5 checksums? It was told on wikipedia that …

md5 checksum data-consistency adler32
To check if two image files are same..Checksum or Hash?

I am doing some image processing code where in I download some images(as BufferedImage) from URLs and pass it …

java image-processing hash checksum integrity
Best way to generate order numbers for an online store?

Every order in my online store has a user-facing order number. I'm wondering the best way to generate them. Criteria …

ruby e-commerce checksum
Very slow to generate MD5 for large file using Java

I am using Java to generate the MD5 hash for some files. I need to generate one MD5 for several …

java performance file md5 checksum