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SWE2 Event type linkage
How are blockchain and digital currencies related? Blockchain technology provides the basis for the existence of a decentralised digital currency. Such a currency is an application that can be executed on the basis of an underlying blockchain. However, the blockchain offers many more applications, such as ownership, identification, communication, etc. , all of which want to get rid of a central controlling party. Blockchain: is the immutable transaction history of a decentralised community. Cryptocurrency: An application of blockchain technology to use a blockchain to secure information about the currency via cryptography. What is Mining? Mining is one of the most misunderstood things about cryptocurrencies. Most people believe that mining is a process in which a cryptocurrency is created. But that is wrong. Mining is a process in a decentralised system to build consensus. Consensus means consent and agreement on what happened and what didn't. In a central system, the central institution does that. For example, a bank with all its advantages and disadvantages. In a decentralised system, the Community decides. To avoid any disagreements, "Mining" is used as one of the possibilities.
The security of an SAP system requires protection against unauthorised access, e.g. through the secinfo and reginfo files. A cleanly implemented authorisation concept protects against attacks within the SAP system. However, it is also possible to attack your SAP system via the network. Through the RFC Gateway Server, your system communicates with external servers and programmes. One particularly effective way to protect against this are so-called Access Control Lists (ACL). Find out what this is and how you can use it to better protect your SAP system. The SAP Standard offers different approaches for gate protection. All methods combined can provide even greater safety. For example, it is possible to use Access Control Lists (ACL) to monitor exactly which external programmes and which hosts can communicate with the gateway. Another option is to configure the gateway to support Secure Network Communication (SNC). Finally, there are various security parameters for the gateway. This article focuses on the use of ACL files such as secinfo and reginfo files. What is an ACL? Access control lists are files in which permitted or prohibited communication partners can be recorded. For the gateway to use these ACL files, parameters must be set in the default profile of the SAP system and of course the files must be maintained accordingly. With the help of logs and traces, which can be configured for this purpose, a precise investigation can be made in advance of the activation, which connections currently run via the gateway. This allows them to prevent important applications with which your system communicates from being blocked by the ACL files. The rules in the ACL files are read from top to bottom of the gateway to decide whether to allow a communication request. If none of the rules matches the requesting programme, it will be blocked. Network-based ACL The network-based ACL file contains permitted and prohibited subnets or specific clients.
User authentication is usually performed by entering a user name and password. This information is called user credentials and should only be known to the user, so that no third party can gain access to the system under a false identity. This post explains how a user's password protection can be circumvented and how to prevent it. SAP system legacy data The login data of a user, including password, are saved in the USR02 database table. However, the password is not in plain text, but encrypted as a hash value. For each user there are not only one but up to three generated password hashes. Different algorithms are used to calculate these values, but only the Salted SHA1 can be considered sufficiently safe. Table deduction USR02 The secure password hash is located in the fifth column of the pictured table deduction with the heading Password hash value. The corresponding data field in the column is called PWDSALTEDHASH. Weak Password Hash Risks You have a good and working permission concept that ensures that no processes or data can be manipulated or stolen. A potential attacker now has the ability to read out your database with the password hashes. The hash values are calculated using password crackers, which are available on the Internet at home, and the attacker now has a long list of user credentials. To damage your system, the user will now search for the appropriate permissions and perform the attack under a false identity. Identifying the actual attacker is virtually impossible. Check if your system is vulnerable too Your system generates the weak hash values if the login/password_downwards_compatibility profile parameter has an unequal value of 0.
SAP Basis is also known as module BC or application Basis. In this context, SAP Basis refers to all transactions, programs and objects that control the functions of the overall system. This includes, among other things, user and authorization management as well as the configuration of interfaces via RFC.
"Shortcut for SAP Systems" makes it easier and quicker to complete a number of SAP basis tasks.
The CodeProfiler prevents poor-quality code or programs with security vulnerabilities from entering a productive SAP system landscape in the first place.
Likewise, the SAP basis should serve as a sparring partner for individuals and boards (such as enterprise architects) that significantly influence the strategy.