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This is a process which makes it pos­sible to check a cryp­to­graphic key without having to match the whole key. This can for instance be used to check the authen­ticity of a cer­tifi­cate upon which a TLS/SSL con­nec­tion is based. A fin­ger­print is usu­ally dis­played as a hexa­dec­imal char­acter string con­sisting of the let­ters A-F and the num­bers 0-9.

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