SSL Glossary

MD5 (Message Digest 5)


A hashing technique that creates a 128-bit message digest

Microsoft Exchange Server 2007


Microsoft Exchange Server is the server side of the popular mail client Outlook. Exchange consists of electronic mail, calendar, contacts and tasks; includes support for mobile and web-based access to information. Typical Exchange installations need a UC or SAN SSL certificate.

Microsoft Internet Information Services


IIS is the short name for Internet Information Services and is Microsoft's popular web server software.

Mot de passe à utilisation unique


Un jeton d'authentification qui ne peut être utilisé qu'une fois

MySSL


MySSL is your SSL247 SSL certificate account - enabling you to easily manage your own, or your clients' certificates, with the least work and hassle. Includes self-service reissue functionality, easy renewals, and ability to report on your SSL certificate portfolio. Never miss a renewal again, and with options to pay-as-you-go, plus buying packs of stocks or crediting tokens, make it work however suits you best.

Non-repudiation


Ensures the ownership of data.

Number DUNS


The Data Universal Numbering System (DUNS) number is a unique nine-digit identification number created and provided by Dun & Bradstreet (D&B). The DUNS number is specific for each location of an entity such as HQ, divisions and branches.

One-Time Password


An authentication token that can only be used once.

OpenSSL


OpenSSL is an open source implementation of the SSL and TLS protocols. Their versions are available for most Unix-like operating systems.

OV SSL (Organisation validated SSL)


There are three types of SSL certificates, with differing validation methods. These are domain, organisation and extended validation certificates. OV Certificates sit between Domain and Extended Validation certificates - find out more about OV SSL validation.

PKCS #12


RSA standard that describes the syntax for storing a user's public keys, private keys, certificates, and other related cryptographic information. The aim is to standardise a single key file for use among a variety of different applications.

PKCS #7


The RSA public key cryptography standard which describes a standard syntax for data, compatible with PEM format, that may be encrypted or signed, such as digital envelopes or digital signatures. Allows other attributes, such as timestamp, to also be authenticated along with the message content. The syntax is recursive so that envelopes can be nested, or someone can sign some previously encrypted data.

PKCS (Public-Key Cryptography Standards)


A series of cryptographic standards of public-key issues, published by RSA Laboratories.

PKI (Public Key Infrastructure)


Is a computerised form of message encryption using two keys; one is public and used by the sender to encrypt the message, the other is private and used by the recipient to decrypt the message. See Private Key and Public Key below also.

Private IP Address


A private IP address is usually used on local networks. An IP address is considered private if the IP number falls within one of the IP address ranges reserved for private uses by Internet Standard groups like RIPE. Example internal/private IP ranges: 10.0.0.0 ' 10.255.255.255 172.16.0.0 ' 172.31.255.255 192.168.0.0 ' 192.168.255.255

Private Key


Your half of the key pair, the other being the public key. It is associated with your SSL certificate. When you create a CSR, you create a private key at the same time. Keep your private key private! Do not email it, share it, or make it public - you do not need to provide it during your enrolment, or at any other time.

Public Key


This part of key is available publicly - your SSL certificate viewable on your website. It matches your Private Key (above).

Root Certificate


A certificate issued from a root level Certificate Authority.

RSA Encryption (Rivest-Sharmir-Adelman)


An encryption and authentication standard based on asymmetric keys. Built on a public key system, 2 digital keys are used: one to encrypt and the other to decrypt.

SAN Certificate


Subject Alternative Names are extra domains or sub-domains you can add to your certificate. SAN SSL are also known as multi-domain SSL. SAN (or UC - unified communications SSL certificates) are especially useful for securing Microsoft Exchange where multiple sub-domains and/or machine names need securing. SAN/UC can also save you time and money compared to multiple, single-domain SSL certs. Find out more about SAN/UC SSL.