Has perimeter security become obsolete?

Tatu Ylönen, founder of Helsinki, Finland-based SSH Communications Security Corp., developed the Secure Shell protocol in 1995. Today, millions worldwide use it for secure remote logins and data transfers over the Internet.

At next week's RSA Security conference, he'll give a presentation on how the growing use of integrated, complex applications has made cyberspace more dangerous, blunting the effectiveness of perimeter security. (The session is Feb. 14, 3:25 p.m., in SJCC Room J2 at the San Jose McEnery Convention Center.)

In this Q&A, Ylönen explains how attacks against integrated applications could cause widespread damage, and how the program he created is being used to counter the threat today.

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