Public & Private Key Encryption (Asymmetric Encryption)<\/span><\/b><\/p>\n Public & Private key encryption (sometimes called asymmetric encryption) involves generating two keys, a public key and a private key. Both keys are mathematically linked using very large prime numbers. Both keys work as a pair.<\/span><\/p>\n In the example above, Bob wishes to send Alice an encrypted message.\u00a0 Alice sends Bob her public key which he uses to encrypt the message.\u00a0 He then sends the encrypted message to Alice who uses her private key to decrypt the message.<\/span><\/p>\n If Alice wished to reply, then she could encrypt the message with her private key and send it to Bob who can decrypt it with her public key<\/span>.<\/span><\/p>\n Secure Socket Layer (SSL)<\/span><\/b>\u00a0is a popular encryption system for secure websites.\u00a0 It operates by:\u00a0<\/span><\/p>\n <\/p>\n The purpose of a digital signature is to authenticate the identity of the sender and ensure that the content has not been modified en route.\u00a0\u00a0<\/span><\/p>\n Digital signature are very difficult to forge and can automatically include a date and time.\u00a0 Digital signatures can be used as legal evidence that the message came from the person sending it and it has not been modified.<\/span><\/p>\n A digital signature is created by:<\/span><\/p>\n The hash total is th<\/span>en recalculated on the message and if it is the same as the total in the digital signature then the recipient can be sure that the message is from the identified sender and has not been modified in any way during transmission.<\/span><\/p>\n Hoax digital signatures can be created using a fake private key claiming to be that of a trusted individual.\u00a0 To get around this, a digital certificate verifies that a sender\u2019s public key is formally registered to that particular sender.<\/span><\/p>\n Digital certificates are issued by certificate authorities such as Verisign or Symantec.\u00a0 This certificate allows the holder to use the Public Key Infrastructure (PKI).<\/span><\/p>\n The digital certificate contains\u00a0<\/span><\/p>\n Applying for a Digital Certificate<\/span><\/b><\/p>\n In order to obtain a digital certificate:<\/span><\/p>\n The certificate authority signs the certificate with its own private key in order to ensure the authenticity, integrity and non-repudiation of the digital certificate. Finally, the certificate authority sends back the certificate to the applicant, which can be used to establish secure communication.<\/span><\/span>\u00a0<\/span><\/p>\n Using a Digital Certificate<\/span><\/b><\/p>\n Using the previous process, User B has applied for and being granted a digital certificate.\u00a0 User A wishes to communicate securely with User B:<\/span><\/p>\n Encryption With so much information being transmitted electronically, it is essential that the information be transferred safely and securely.\u00a0 One of the methods of doing this is to use encryption.\u00a0 Public & Private Key Encryption (Asymmetric Encryption) Public & Private key encryption (sometimes called asymmetric encryption) involves generating two keys, a public key and a […]<\/p>\n","protected":false},"author":79984,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-123","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/glowblogs\/phshighercomputingscience\/wp-json\/wp\/v2\/pages\/123","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/glowblogs\/phshighercomputingscience\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/glowblogs\/phshighercomputingscience\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/glowblogs\/phshighercomputingscience\/wp-json\/wp\/v2\/users\/79984"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/glowblogs\/phshighercomputingscience\/wp-json\/wp\/v2\/comments?post=123"}],"version-history":[{"count":4,"href":"https:\/\/blogs.glowscotland.org.uk\/glowblogs\/phshighercomputingscience\/wp-json\/wp\/v2\/pages\/123\/revisions"}],"predecessor-version":[{"id":132,"href":"https:\/\/blogs.glowscotland.org.uk\/glowblogs\/phshighercomputingscience\/wp-json\/wp\/v2\/pages\/123\/revisions\/132"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/glowblogs\/phshighercomputingscience\/wp-json\/wp\/v2\/media?parent=123"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
\nThe public key can be distributed to anyone who wishes to send you a message and they use this public key to encrypt the data.\u00a0\u00a0<\/span>The public key can also decrypt data that has been encrypted with the private key.\u00a0<\/span><\/li>\n
\nThe private key is known only by you only this private key can be used to decrypt data created by the corresponding public key.\u00a0<\/span><\/li>\n<\/ul>\n![\"\"](\"https:\/\/blogs.glowscotland.org.uk\/glowblogs\/public\/phshighercomputingscience\/uploads\/sites\/10042\/2022\/05\/17155949\/GetImage-14-300x182.png\")
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<\/p>\nDigital Signature<\/h2>\n
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<\/p>\nDigital Certificate<\/h2>\n
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