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2. X.509 - Wikipedia

   en.wikipedia.org/wiki/X.509

   In cryptography, X.509 is an International Telecommunication Union (ITU) standard defining the format of public key certificates. [1] X.509 certificates are used in many Internet protocols, including TLS/SSL, which is the basis for HTTPS, [2] the secure protocol for browsing the web. They are also used in offline applications, like electronic ...

3. Security printing - Wikipedia

   en.wikipedia.org/wiki/Security_printing

   Security printing. Security printing is the field of the printing industry that deals with the printing of items such as banknotes, cheques, passports, tamper-evident labels, security tapes, product authentication, stock certificates, postage stamps, and identity cards. The main goal of security printing is to prevent forgery, tampering, or ...

4. Certificate signing request - Wikipedia

   en.wikipedia.org/wiki/Certificate_signing_request

   Certificate signing request. In public key infrastructure (PKI) systems, a certificate signing request (CSR or certification request) is a message sent from an applicant to a certificate authority of the public key infrastructure (PKI) in order to apply for a digital identity certificate. The CSR usually contains the public key for which the ...

5. PKCS 12 - Wikipedia

   en.wikipedia.org/wiki/PKCS_12

   Microsoft PFX file format. In cryptography, PKCS #12 defines an archive file format for storing many cryptography objects as a single file. It is commonly used to bundle a private key with its X.509 certificate or to bundle all the members of a chain of trust. A PKCS #12 file may be encrypted and signed. The internal storage containers, called ...

6. Banknotes of the United States dollar - Wikipedia

   en.wikipedia.org/wiki/Banknotes_of_the_United...

   They switched to small size in 1929 and are the only type of currency in circulation today in the United States. They were originally printed in denominations of $5, $10, $20, $50, $100, $500, $1,000, $5,000 and $10,000. The $500, $1,000, $5,000 and $10,000 denominations were last printed in 1945 and discontinued in 1969, making the $100 bill ...

7. Public key infrastructure - Wikipedia

   en.wikipedia.org/wiki/Public_key_infrastructure

   Public key infrastructure. A public key infrastructure (PKI) is a set of roles, policies, hardware, software and procedures needed to create, manage, distribute, use, store and revoke digital certificates and manage public-key encryption. The purpose of a PKI is to facilitate the secure electronic transfer of information for a range of network ...