The meaning of MD5 and PGP appearing when Apache was downloaded

The meaning of PGP and MD5 when downloading

These two files are just checksums, used to ensure that the Apache files you downloaded are correct and usually not available, If you do not rest assured that you can use the relevant tools to calculate the Apache.msi file MD5 and the MD5 file comparison, the same means that the downloaded file is correct (not in the download process error), PGP is the digital signature of Apache, to ensure that the file is not stolen by a third party beam exchange.

PGP (Pretty good Privacy) is signed and it is guaranteed to be the official version of the download.

MD5 (Message digest algorithm 5) signature, which guarantees that the downloaded file is not corrupted.