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A certificate of authenticity (COA) is a seal or small sticker on a proprietary computer program, t-shirt, jersey, or any other memorabilia or art work, especially in the world of computers and sports. It is commonly a seal on paper authenticating a specific art work which and is made to demonstrate that the item is authentic.
Signed sports memorabilia is usually accompanied by a certificate of authenticity. These external records have their own problems of forgery and perjury and are also vulnerable to being separated from the artifact and lost. In computer science, a user can be given access to secure systems based on user credentials that imply authenticity. [6]
To guard against unwittingly buying a forged work of art, sellers and buyers use a certificate of authenticity as documentary proof that an artwork is the genuine creation of the artist identified as the author of the work — yet there is much business in counterfeit certificates of authenticity, which determines the monetary value of a work ...
These days everything comes with a certificate of authenticity: Twilight Zone DVDs, Electrolux vacuum cleaners (I've had one and trust me: You want a fake one), collectible plates worth $1, dildos ...
Documentation examination involves scrutinizing the authenticity and accuracy of supporting paperwork, including certificates of authenticity, exhibition, and gallery records, as well as correspondence. Art authentication is a complex and multifaceted process, often accompanied by challenges and controversies. Some of the key issues include ...
Alice signs a message—"Hello Bob!"—by appending a signature computed from the message and her private key. Bob receives both the message and signature. He uses Alice's public key to verify the authenticity of the signed message. A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A ...
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