Is there any other option besides checking the sha-1 checksum if the uploaded image is the exact copy from msdna ? Or is the sha-1 enough to 100% say its the same?
Even if 1 bit is changed, the hash will change, so you can 110% rely on the hash That's the whole point of hashes
You can create a different data set with the same sha1. Professor Wang did just that and found a different data stream with an identical finger print that matches the SHA-1 hash of the original data stream. But you cannot alter an existing data set without to change its functionality and/or file size. If file size and functionality is the same then you can be 100% sure.
what would you say about Windows 7 Ultimate x86/x64 ISO Download from bjorn96 (C6620AE85D42FCA40C202B68C0E7124BC0EDA7C2*pl_windows_7_ultimate_with_sp1_x64_dvd_u_677341.iso) and pl_windows_xp_professional_with_service_pack_3_x86_cd_vl_x14-74003.iso or pl_windows_xp_professional_with_service_pack_3_x86_cd_x14-80476.iso from SmartVersion patch's conversions Windows XP EN2XX from LostED i checked the hashes and they match so I assume its safe to download them? and could you explain me what [h=2]SmartVersion patch's conversions Windows XP EN2XX means?[/h]
Maybe LostED can add his comments on that. Same hash and same file size=same content. There are two pro licenses VolumeLicense and retail. Also there are w7 ultimate SP1 ISOs with media refresh (Windows ISO's include the KB2534111 update) and without.