One goal of the proposal is to enable applications to use KEM algorithms such as the RSA Key Encapsulation Mechanism (RSA-KEM), the Elliptic Curve Integrated Encryption Scheme (ECIES), and candidate algorithms for the National Institute of Standards and Technology (NIST) Post-Quantum Cryptography standardization process. An API for key encapsulation mechanisms, an encryption technique for securing symmetric keys via public cryptography.This change will move the Java platform closer to integrity by default. With JDK 21, plans call for requiring dynamic loading of agents to be approved by the application owner, just as has been required with the startup-time loading of agents. JDK 5 required agents to be specified on the command line, to ensure that the owner of an application approved the use of agents. There also is nothing to stop an agent from altering code outside the application, such as code in the JDK itself. While agents were designed with benign instrumentation in mind, advanced developers found use cases, such as aspect-oriented programming, that change application behavior in arbitrary ways. An agent is a component that can alter application code while the application is running these were introduced by the Java Platform Profiling Architecture in JDK 5 in 2004 as a way for tools (notably profilers) to instrument classes. The plan also calls for aligning the ability to load agents dynamically with other so-called “superpower” capabilities such as deep reflection. Other goals of the proposal include reassessing the balance between serviceability, which involves ad hoc changes to running code, and integrity, which assumes running code is not arbitrarily changed, and ensuring that the majority of tools, which do not need to load agents dynamically, are unaffected. These warnings are intended to prepare for a future release that disallows the dynamic loading of agents by default, in order to improve integrity by default. A proposal to prepare to disallow the dynamic loading of agents calls for issuing warnings when agents are loaded dynamically into a running JVM.Goals of the plan include ease of use, comprehensibility, robustness, and performance. A scoped value allows data to be safely shared between components in a large program without resorting to method arguments. Thread-local variables have design flaws including unconstrained mutability, unbounded lifetime, and expensive inheritance. They are preferred to thread-local variables, particularly when using large numbers of virtual threads.
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