Using the SecureString Class

NET 2.0’s System.Security namespace includes the SecureString class, which lets you create encrypted strings and delete them from memory when they’re no longer needed. You can even make a string behave as a read-only string?and prevent any copies from being made, ensuring that there’s only a single copy in memory. Moreover, you can wipe the string out of memory by calling its Dispose() method.

SecureStrings are similar to Strings, but the framework automatically encrypts them when they’re initialized or modified. SecureStrings remain modifiable until the application marks them as read-only.

To create a SecureString, you append one character at a time:

System.Security.SecureString secString = new System.Security.SecureString();secString.AppendChar('D');secString.AppendChar('e');secString.AppendChar('V');secString.AppendChar('X');secString.AppendChar('P');secString.AppendChar('W');secString.AppendChar('D');

When the string contains the data you want, you can make it immutable and uncopyable by calling the MakeReadOnly method:


To read the secure value, use the SecureStringToBSTR() method as follows:

IntPtr ptr =    System.Runtime.InteropServices.Marshal.SecureStringToBSTR(secString);string sDecrypString =    System.Runtime.InteropServices.Marshal.PtrToStringUni(ptr);

The garbage collector will remove SecureStrings when they’re no longer referenced, but you can dispose of a SecureString by using the Dispose() method:

Share the Post:
Share on facebook
Share on twitter
Share on linkedin


The Latest

homes in the real estate industry

Exploring the Latest Tech Trends Impacting the Real Estate Industry

The real estate industry is changing thanks to the newest technological advancements. These new developments — from blockchain and AI to virtual reality and 3D printing — are poised to change how we buy and sell homes. Real estate brokers, buyers, sellers, wholesale real estate professionals, fix and flippers, and beyond may

man on floor with data

DevX Quick Guide to Data Ingestion

One of the biggest trends of the 21st century is the massive surge in internet usage. With major innovations such as smart technology, social media, and online shopping sites, the internet has become an essential part of everyday life for a large portion of the population. Due to this internet

payment via phone

7 Ways Technology Has Changed Traditional Payments

In today’s digital world, technology has changed how we make payments. From contactless cards to mobile wallets, it’s now easier to pay for goods and services without carrying cash or using a checkbook. This article will look at seven of the most significant ways technology has transformed traditional payment methods.