Authenticated encryption algorithms protect both the
confidentiality and integrity of messages in a single processing pass.
In this note we show how to utilize the $L \circ P \circ S$
transform of the Russian GOST R 34.11-2012 standard hash
``Streebog'' to build an efficient, lightweight algorithm for
Authenticated Encryption with Associated Data (AEAD) via the Sponge
construction and BLNK padding. The proposed algorithm ``StriBob'' has
attractive security properties, is faster than the Streebog hash alone,
twice as fast as the GOST 28147-89 encryption algorithm, and requires
only a modest amount of running-time memory. StriBob is a
Round 1 candidate in the CAESAR competition.
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