NCMEC hosts the NGO hash sharing platform, which includes MD5 and SHA1 hash values, as well as pDNA signatures, of images and videos tagged as Child Sexual Abuse Material by NCMEC, Internet Watch Foundation and the Canadian Centre for Child Protection. These hashes and signatures are made available to ESPs and other industry partners for free, for their use in their voluntary initiatives to detect, report and remove CSAM files on their services and platforms. As part of our Survivor Services program, NCMEC provides an exploitative hash sharing list, which includes MD5 and SHA1 hash values, as well as pDNA signatures, of images and videos tagged as "exploitative" by NCMEC. These files, which not illegal under federal guidelines, depict, support, and/or promote the exploitation of victims that are seen in associated CSAM files. These hashes and signatures are made available to ESPs and other industry partners for use in their voluntary initiatives to detect, report and remove files in support of survivors' privacy and protection. NCMEC hosts the Industry Hash Sharing Platform, which includes MD5 and SHA1 hash values, as well as pDNA signatures, of images and videos tagged as Child Sexual Abuse Material, which is shared by industry themselves. These hashes and signatures are made available by ESP's to other ESPs and other industry partners for use in their voluntary initiatives to detect, report and remove CSAM files. NCMEC's Hash Sharing Platform is the infrastructure and technical system which hosts the NGO CSAM, Industry and NCMEC Exploitative hash lists. This technical system supports the file information, hashes and signatures, and file tags to allow for these robust sharing initiatives.
The National Center for Missing & Exploited Children (NCMEC)