crypto
The
crypto  object is
global   object that   allows   using   cryptographic
functionality (since 0ZQ)_
crypto.getRandomVaLues(typedArray)
Gets cryptographically strong random values_
Returns the same array
passed as typedArray but with its contents replaced with the newly
generated random numbers_
Possible values:
typedArray
can
be
Int8Array,  IntlGArray:
Uintlgarray,
Int32Array,
Uint32Array
subtle.encrypt(algorith; key: data)
Encrypts   data   using   the
provided  algorithm
and
key:
Returns
Promise  that fulfills   with
ArrayBuffer containing
the   ciphertext:
Possible values:
algorithm
an
object that specifies the algorithm
to be used and any extra
parameters If required:
for RSA
OAEP
pass the object with the following keys:
name IS &
~string; should be set to RSA-OAEP:
crypto. subtle encrypt ( {name:
RSA
OAEP" } , key , data)
for AES
CTR, pass the object with the following keys:
name iS a string, should be
to AES
CTR
counter IS an ArrayBuffer, TypedArray, Or DataView
the
initial value of the counter block; must be 16 bytes long
(the AES block size) . The rightmost length
bits  of this
block are used for the counter; and the rest is used for
the nonce. For example, if length is set to 64, then the
first half of counter is the nonce
the second half is
used for the counter
Length is the number of bits in the counter block that are
used for the
actual
counter   The
counter
must
be   big
enough that
doesn't wrap_
for AES-CBC, pass the object with the following keys:
name IS &
~string; should be set to AES-CBC
the
initialization
vector;
ArrayBuffer,
TypedArray
or DataView; must be 16 bytes, unpredictable
and   preferably   cryptographically   random:
However;
crypto ,
set i
and