CoSign by ARX is a digital signature solution developed and marketed by ARX (Algorithmic Research).

CoSign enables users to streamline their workflows and develop paperless processes by digitally signing files and documents.[1] Digital signatures, which are based on Public Key Infrastructure (PKI) technology, provide high levels of security and universal acceptance. They are the result of a cryptographic operation that creates a ‘fingerprint’ unique to both the signer and the content, so that they cannot be copied, forged or tampered with. This process provides proof of signer identity, data integrity and the non-repudiation of signed documents, all of which can be verified without the need for proprietary verification software.[2]

CoSign has versions both on-premises and in the cloud. It can be used on any device to sign documents in Word, Excel, PDF and other file types. CoSign digital signatures can be integrated directly into a large range of document/content management and workflow automation systems, including SharePoint,[3] OpenText,[4] Oracle,[5] Alfresco,[6] Nintex and K2.

Industries of focus include life science (particularly research and clinical trials[7][8]), engineering and federal/local governments[9], although Cosign is used to replace pen and paper signatures in other industries as well. Cosign is used in North America, Africa[10], and Europe (particularly Italy, where it is used by the Ministry of Defence, RAI, Senate, Court of Accounts, State Police and Bank of Italy[11]). It is also used by the European Court of Human Rights to digitize and streamline their application process.[12]

CoSign complies with ESIGN, UETA, FDA 21 CFR Part 11, SOX, HIPAA, and USDA regulations, as well as with the EU’s newly enacted Electronic Identification and Trust Services regulation for Electronic Transactions in the Internal Market (eIDAS). CoSign is also validated for security standards such as NIST FIPS 140-2 level 3,[13] FIPS 186 and ETSI TS 101 733. In 2013, Cosign was called “the strongest digital signature solution” in the Forrester Wave: E-Signatures, Q2 2013 report[14]). In August 2014, CoSign became the first remote / server-side digital signature solution to receive Common Criteria EAL4+[15] certification, thus becoming compliant with the eIDAS regulations.[16]

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